Commit Graph

380753 Commits

Author SHA1 Message Date
Akira Takeuchi e3f12a5304 mn10300: Use early_param() to parse "mem=" parameter
This fixes the problem that "init=" options may not be passed to kernel
correctly.

parse_mem_cmdline() of mn10300 arch gets rid of "mem=" string from
redboot_command_line. Then init_setup() parses the "init=" options from
static_command_line, which is a copy of redboot_command_line, and keeps
the pointer to the init options in execute_command variable.

Since the commit 026cee0 upstream (params: <level>_initcall-like kernel
parameters), static_command_line becomes overwritten by saved_command_line at
do_initcall_level(). Notice that saved_command_line is a command line
which includes "mem=" string.

As a result, execute_command may point to weird string by the length of
"mem=" parameter.
I noticed this problem when using the command line like this:

    mem=128M console=ttyS0,115200 init=/bin/sh

Here is the processing flow of command line parameters.
    start_kernel()
      setup_arch(&command_line)
         parse_mem_cmdline(cmdline_p)
           * strcpy(boot_command_line, redboot_command_line);
           * Remove "mem=xxx" from redboot_command_line.
           * *cmdline_p = redboot_command_line;
      setup_command_line(command_line) <-- command_line is redboot_command_line
        * strcpy(saved_command_line, boot_command_line)
        * strcpy(static_command_line, command_line)
      parse_early_param()
        strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
        parse_early_options(tmp_cmdline);
          parse_args("early options", cmdline, NULL, 0, 0, 0, do_early_param);
      parse_args("Booting ..", static_command_line, ...);
        init_setup() <-- save the pointer in execute_command
      rest_init()
        kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);

At this point, execute_command points to "/bin/sh" string.

    kernel_init()
      kernel_init_freeable()
        do_basic_setup()
          do_initcalls()
            do_initcall_level()
              (*) strcpy(static_command_line, saved_command_line);

Here, execute_command gets to point to "200" string !!

Signed-off-by: David Howells <dhowells@redhat.com>
2013-06-28 16:53:03 +01:00
Akira Takeuchi c6dc9f0a4e mn10300: Allow to pass array name to get_user()
This fixes the following compile error:

CC block/scsi_ioctl.o
block/scsi_ioctl.c: In function 'sg_scsi_ioctl':
block/scsi_ioctl.c:449: error: invalid initializer

Signed-off-by: David Howells <dhowells@redhat.com>
2013-06-28 16:53:01 +01:00
Davidlohr Bueso d2e08473f2 softirq: Use _RET_IP_
Use the already defined macro to pass the function return address.

Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1367347569.1784.3.camel@buesod1.americas.hpqcorp.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 14:10:57 +02:00
Alex Shi 333bb864f1 sched/debug: Remove CONFIG_FAIR_GROUP_SCHED mask
Now that we are using runnable load avg in sched balance, we don't
need to keep it under CONFIG_FAIR_GROUP_SCHED.

Also align the code style to #ifdef instead of #if defined() and
reorder the tg output info.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Cc: pjt@google.com
Cc: kamalesh@linux.vnet.ibm.com
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/1372417835-4698-1-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-28 13:17:17 +02:00
Thomas Gleixner ccc414f839 genirq: Add the generic chip to the genirq docbook
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Randy Dunlap <rdunlap@infradead.org>
2013-06-28 12:56:04 +02:00
Fabio Estevam d55f0cc4c9 genirq: generic-chip: Export some irq_gc_ functions
When building imx_v6_v7_defconfig with imx-drm drivers selected as
modules, we get the following build errors:

ERROR: "irq_gc_mask_clr_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined!
ERROR: "irq_gc_mask_set_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined!
ERROR: "irq_gc_ack_set_bit" [drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.ko] undefined!

Export the required functions to avoid this problem.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Cc: shawn.guo@linaro.org
Cc: kernel@pengutronix.de
Link: http://lkml.kernel.org/r/1372389789-7048-1-git-send-email-festevam@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 12:56:04 +02:00
Ben Hutchings 2779db8d37 genirq: Fix can_request_irq() for IRQs without an action
Commit 02725e7471 ('genirq: Use irq_get/put functions'),
inadvertently changed can_request_irq() to return 0 for IRQs that have
no action.  This causes pcibios_lookup_irq() to select only IRQs that
already have an action with IRQF_SHARED set, or to fail if there are
none.  Change can_request_irq() to return 1 for IRQs that have no
action (if the first two conditions are met).

Reported-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
Tested-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is> (against 3.2)
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: 709647@bugs.debian.org
Cc: stable@vger.kernel.org # 2.6.39+
Link: http://bugs.debian.org/709647
Link: http://lkml.kernel.org/r/1372383630.23847.40.camel@deadeye.wl.decadent.org.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 12:56:03 +02:00
Sachin Kamat b8394dee78 irqchip: exynos-combiner: Staticize combiner_init
combiner_init() is referenced only in this file. Make it
static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kgene.kim@samsung.com
Cc: t.figa@samsung.com
Cc: arnd@arndb.de
Cc: patches@linaro.org
Link: http://lkml.kernel.org/r/1372246597-32323-2-git-send-email-sachin.kamat@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-28 12:56:03 +02:00
Kamalesh Babulal add332a152 sched/debug: Fix formatting of /proc/<PID>/sched
This patch alters format string's width, to align all statistics
at par with the longest struct sched_statistic member name under
/proc/<PID>/sched.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20130627165005.GA15583@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-28 11:13:35 +02:00
Borislav Petkov 4f4319a02a x86/ioremap: Correct function name output
Infact, let the compiler enter the function name so that there
are no discrepancies.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1372369996-20556-1-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-28 11:11:58 +02:00
Ingo Molnar fb476cffd5 Changes to simplify the SDM mean that we can also simplify
the code for SRAR (software recoverable action required) errors.
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Merge tag 'please-pull-mce' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/ras

Pull MCE cleanup from Tony Luck:

 "Changes to simplify the SDM means that we can also simplify
  the code for SRAR (software recoverable action required) errors."

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-28 11:09:26 +02:00
Qiaowei Ren 13bfd47a0e x86/tboot: Provide debugfs interfaces to access TXT log
These logs come from tboot (Trusted Boot, an open source,
pre-kernel/VMM module that uses Intel TXT to perform a
measured and verified launch of an OS kernel/VMM.).

Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Gang Wei <gang.wei@intel.com>
Link: http://lkml.kernel.org/r/1372053333-21788-1-git-send-email-qiaowei.ren@intel.com
[ Beautified the code a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-28 11:05:16 +02:00
Dave Airlie 18097b91aa drm/qxl: add missing access check for execbuffer ioctl
Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-06-28 13:27:40 +10:00
Thadeu Lima de Souza Cascardo 1abd601864 powerpc/eeh: Add eeh_dev to the cache during boot
commit f8f7d63fd9 ("powerpc/eeh: Trace eeh
device from I/O cache") broke EEH on pseries for devices that were
present during boot and have not been hotplugged/DLPARed.

eeh_check_failure will get the eeh_dev from the cache, and will get
NULL. eeh_addr_cache_build adds the addresses to the cache, but eeh_dev
for the giving pci_device is not set yet. Just reordering the call to
eeh_addr_cache_insert_dev works fine. The ordering is similar to the one
in eeh_add_device_late.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-06-28 12:02:07 +10:00
Olof Johansson 8c3d913888 MSM clock updates for 3.11.
Per Stephen Boyd's coverletter:
 
 Resending to collect higher level maintainer acks per Olof's request.
 The plan is to push this patchset through MSM to the arm-soc tree.
 
 This patchset moves the existing MSM clock code and affected drivers
 to the common clock framework. A prerequisite of moving to the common
 clock framework is to use clk_prepare() and clk_enable() so the first
 few patches migrate drivers to that call (clk_prepare() is a no-op on
 MSM right now). It also removes some custom clock APIs that MSM
 provides and finally moves the proc_comm clock code to the common
 struct clk.
 
 This patch series will be used as the foundation of the MSM 8660/8960
 clock code that I plan to send out after this series.
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Merge tag 'msm-clock-for-3.11b' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/late

From David Brown:
MSM clock updates for 3.11.

Per Stephen Boyd's coverletter:

Resending to collect higher level maintainer acks per Olof's request.
The plan is to push this patchset through MSM to the arm-soc tree.

This patchset moves the existing MSM clock code and affected drivers
to the common clock framework. A prerequisite of moving to the common
clock framework is to use clk_prepare() and clk_enable() so the first
few patches migrate drivers to that call (clk_prepare() is a no-op on
MSM right now). It also removes some custom clock APIs that MSM
provides and finally moves the proc_comm clock code to the common
struct clk.

This patch series will be used as the foundation of the MSM 8660/8960
clock code that I plan to send out after this series.

* tag 'msm-clock-for-3.11b' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
  ARM: msm: Migrate to common clock framework
  ARM: msm: Make proc_comm clock control into a platform driver
  ARM: msm: Prepare clk_get() users in mach-msm for clock-pcom driver
  ARM: msm: Remove clock-7x30.h include file
  ARM: msm: Remove custom clk_set_{max,min}_rate() API
  ARM: msm: Remove custom clk_set_flags() API
  msm: iommu: Use clk_set_rate() instead of clk_set_min_rate()
  msm: iommu: Convert to clk_prepare/unprepare
  msm_sdcc: Convert to clk_prepare/unprepare
  usb: otg: msm: Convert to clk_prepare/unprepare
  msm_serial: Use devm_clk_get() and properly return errors
  msm_serial: Convert to clk_prepare/unprepare

Acked-by: Chris Ball <cjb@laptop.org> # for msm_sdcc.c
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-27 17:04:27 -07:00
Olof Johansson fbd1a04b21 Merge branch 'msm/fixes' into next/late
Merging in msm/fixes to avoid silly conflicts at top level.

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-27 17:04:00 -07:00
Chen Gong 33d7885b59 x86/mce: Update MCE severity condition check
Update some SRAR severity conditions check to make it clearer,
according to latest Intel SDM Vol 3(June 2013), table 15-20.

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2013-06-27 13:45:52 -07:00
Bob Peterson a01aedfe21 GFS2: Reserve journal space for quota change in do_grow
If a GFS2 file system is mounted with quotas and a file is grown
in such a way that its free blocks for the allocation are represented
in a secondary bitmap, GFS2 ran out of blocks in the transaction.
That resulted in "fatal: assertion "tr->tr_num_buf <= tr->tr_blocks".
This patch reserves extra blocks for the quota change so the
transaction has enough space.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2013-06-27 18:16:27 +01:00
Arnd Bergmann b88923451f Device Tree updates for DaVinci
This patch set updates da850 DTS files to enable use of
 C pre-processor. Also updates pinctrl-single DT data
 to go with changes done in that module to enable a
 single register to service configuration of multiple
 pins.
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Merge tag 'davinci-for-v3.11/dt' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci into next/late

From Sekhar Nori:

Device Tree updates for DaVinci

This patch set updates da850 DTS files to enable use of
C pre-processor. Also updates pinctrl-single DT data
to go with changes done in that module to enable a
single register to service configuration of multiple
pins.

* tag 'davinci-for-v3.11/dt' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
  ARM: davinci: da850: adopt to pinctrl-single change for configuring multiple pins
  ARM: davinci: da850: Use #include for all device trees

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 15:09:52 +02:00
Arnd Bergmann 6b9a39de73 Several fixes for:
- external irq on non-DT boards
 - cpuidle code in some circumstances
 - PMC code in relation with PLLB/PLL_UTMI/USB:
   mainly for SAMA5D3 and AT91SAM9N12
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Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into next/fixes-non-critical

From Nicolas Ferre:

Several fixes for:
- external irq on non-DT boards
- cpuidle code in some circumstances
- PMC code in relation with PLLB/PLL_UTMI/USB:
  mainly for SAMA5D3 and AT91SAM9N12

* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
  ARM: at91/PMC: use at91_usb_rate() for UTMI PLL
  ARM: at91/PMC: fix at91sam9n12 USB FS init
  ARM: at91/PMC: at91sam9n12 family has a PLLB
  ARM: at91/PMC: sama5d3 family doesn't have a PLLB
  ARM: at91: cpuidle: Fix target_residency
  ARM: at91: fix at91_extern_irq usage for non-dt boards

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 15:03:13 +02:00
Linus Walleij 31c72abbca ARM: ux500: bail out on alien cpus
This makes the l2x0 initialization fail gracefully on non-ux500
systems.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-27 15:00:56 +02:00
Josh Durgin d2d1f17a0d rbd: send snapshot context with writes
Sending the right snapshot context with each write is required for
snapshots to work. Due to the ordering of calls, the snapshot context
is never set for any requests. This causes writes to the current
version of the image to be reflected in all snapshots, which are
supposed to be read-only.

This happens because rbd_osd_req_format_write() sets the snapshot
context based on obj_request->img_request. At this point, however,
obj_request->img_request has not been set yet, to the snapshot context
is set to NULL. Fix this by moving rbd_img_obj_request_add(), which
sets obj_request->img_request, before the osd request formatting
calls.

This resolves:
    http://tracker.ceph.com/issues/5465

Reported-by: Karol Jurak <karol.jurak@gmail.com>
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2013-06-27 05:55:29 -07:00
Arnd Bergmann 0ad578ef25 Renesas sh-sci updates for v3.11
HSCIF support by Ulrich Hecht.
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Merge tag 'renesas-sh-sci-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/late

Renesas sh-sci updates for v3.11

HSCIF support by Ulrich Hecht.

* tag 'renesas-sh-sci-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  serial: sh-sci: Initialise variables before access in sci_set_termios()
  ARM: shmobile: r8a7790: don't use external clock for SCIFs
  ARM: shmobile: r8a7790: HSCIF support
  serial: sh-sci: HSCIF support

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 14:26:33 +02:00
Arnd Bergmann 4022acdb5b Merge branch 'renesas/boards2' into next/late
Conflicts:
	arch/arm/mach-shmobile/setup-r8a7778.c

This is a dependency for the Renesas sh-sci updates.

Signedf-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 14:26:06 +02:00
Linus Walleij 1eb92b24e2 ARM: integrator: let pciv3 use mem/premem from device tree
Instead of relying on the hard-coded mem/premem bases for
the PCI side, read in these from the device tree in the
DT probe path. Hard-code the old values on the non-DT probe
path. Introduce some static locals to hold these addresses
instead of the earlier static #defines.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 14:19:54 +02:00
Linus Walleij 56ce3ffbd5 ARM: integrator: set local side PCI addresses right
This alters the local side address of the iospace to zero,
non prefetchable memory local side address to 0x00000000 and
prefetchable memory local side address to 0x10000000,
so as to match the values actually poked in by the driver.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 14:19:12 +02:00
Kamalesh Babulal 239003ea2e sched: Fix typo in struct sched_avg member description
Remove extra 'for' from the description about member of
struct sched_avg.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: pjt@google.com
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20130627060409.GB18582@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:18:26 +02:00
Kamalesh Babulal 0fc576d592 sched/fair: Fix typo describing flags in enqueue_entity
Fix spelling of 'calling' in description of se flags in
enqueue_entity().

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20130627055418.GA18582@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:18:25 +02:00
Kamalesh Babulal 939fd731eb sched/debug: Add load-tracking statistics to task
At present we print per-entity load-tracking statistics for
cfs_rq of cgroups/runqueues. Given that per task statistics
is maintained, it can be used to know the contribution made
by the task to its parenting cfs_rq level.

This patch adds per-task load-tracking statistics to /proc/<PID>/sched.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130625080336.GA20175@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:46 +02:00
Alex Shi a9dc5d0e33 sched: Change get_rq_runnable_load() to static and inline
Based-on-patch-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-14-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:44 +02:00
Alex Shi a9cef46a10 sched/tg: Remove tg.load_weight
Since no one use it.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-13-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:43 +02:00
Alex Shi 2509940fd7 sched/cfs_rq: Change atomic64_t removed_load to atomic_long_t
Similar to runnable_load_avg, blocked_load_avg variable, long type is
enough for removed_load in 64 bit or 32 bit machine.

Then we avoid the expensive atomic64 operations on 32 bit machine.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-12-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:41 +02:00
Alex Shi bf5b986ed4 sched/tg: Use 'unsigned long' for load variable in task group
Since tg->load_avg is smaller than tg->load_weight, we don't need a
atomic64_t variable for load_avg in 32 bit machine.
The same reason for cfs_rq->tg_load_contrib.

The atomic_long_t/unsigned long variable type are more efficient and
convenience for them.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-11-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:40 +02:00
Alex Shi 72a4cf20cb sched: Change cfs_rq load avg to unsigned long
Since the 'u64 runnable_load_avg, blocked_load_avg' in cfs_rq struct are
smaller than 'unsigned long' cfs_rq->load.weight. We don't need u64
vaiables to describe them. unsigned long is more efficient and convenience.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-10-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:38 +02:00
Alex Shi a003a25b22 sched: Consider runnable load average in move_tasks()
Aside from using runnable load average in background, move_tasks is
also the key function in load balance. We need consider the runnable
load average in it in order to make it an apple to apple load
comparison.

Morten had caught a div u64 bug on ARM, thanks!

Thanks-to: Morten Rasmussen <morten.rasmussen@arm.com>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-8-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:36 +02:00
Alex Shi b92486cbf2 sched: Compute runnable load avg in cpu_load and cpu_avg_load_per_task
They are the base values in load balance, update them with rq runnable
load average, then the load balance will consider runnable load avg
naturally.

We also try to include the blocked_load_avg as cpu load in balancing,
but that cause kbuild performance drop 6% on every Intel machine, and
aim7/oltp drop on some of 4 CPU sockets machines.
Or only add blocked_load_avg into get_rq_runable_load, hackbench still
drop a little on NHM EX.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-7-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:35 +02:00
Alex Shi 83dfd5235e sched: Update cpu load after task_tick
To get the latest runnable info, we need do this cpuload update after
task_tick.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-6-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:33 +02:00
Alex Shi 282cf499f0 sched: Fix sleep time double accounting in enqueue entity
The woken migrated task will __synchronize_entity_decay(se); in
migrate_task_rq_fair, then it needs to set
`se->avg.last_runnable_update -= (-se->avg.decay_count) << 20' before
update_entity_load_avg, in order to avoid sleep time is updated twice
for se.avg.load_avg_contrib in both __syncchronize and
update_entity_load_avg.

However if the sleeping task is woken up from the same cpu, it miss
the last_runnable_update before update_entity_load_avg(se, 0, 1), then
the sleep time was used twice in both functions.  So we need to remove
the double sleep time accounting.

Paul also contributed some code comments in this commit.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-5-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:32 +02:00
Alex Shi a75cdaa915 sched: Set an initial value of runnable avg for new forked task
We need to initialize the se.avg.{decay_count, load_avg_contrib} for a
new forked task. Otherwise random values of above variables cause a
mess when a new task is enqueued:

    enqueue_task_fair
        enqueue_entity
            enqueue_entity_load_avg

and make fork balancing imbalance due to incorrect load_avg_contrib.

Further more, Morten Rasmussen notice some tasks were not launched at
once after created. So Paul and Peter suggest giving a start value for
new task runnable avg time same as sched_slice().

PeterZ said:

> So the 'problem' is that our running avg is a 'floating' average; ie. it
> decays with time. Now we have to guess about the future of our newly
> spawned task -- something that is nigh impossible seeing these CPU
> vendors keep refusing to implement the crystal ball instruction.
>
> So there's two asymptotic cases we want to deal well with; 1) the case
> where the newly spawned program will be 'nearly' idle for its lifetime;
> and 2) the case where its cpu-bound.
>
> Since we have to guess, we'll go for worst case and assume its
> cpu-bound; now we don't want to make the avg so heavy adjusting to the
> near-idle case takes forever. We want to be able to quickly adjust and
> lower our running avg.
>
> Now we also don't want to make our avg too light, such that it gets
> decremented just for the new task not having had a chance to run yet --
> even if when it would run, it would be more cpu-bound than not.
>
> So what we do is we make the initial avg of the same duration as that we
> guess it takes to run each task on the system at least once -- aka
> sched_slice().
>
> Of course we can defeat this with wakeup/fork bombs, but in the 'normal'
> case it should be good enough.

Paul also contributed most of the code comments in this commit.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Reviewed-by: Paul Turner <pjt@google.com>
[peterz; added explanation of sched_slice() usage]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-4-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:30 +02:00
Alex Shi fa6bddeb14 sched: Move a few runnable tg variables into CONFIG_SMP
The following 2 variables are only used under CONFIG_SMP, so its
better to move their definiation into CONFIG_SMP too.

        atomic64_t load_avg;
        atomic_t runnable_avg;

Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1371694737-29336-3-git-send-email-alex.shi@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:29 +02:00
Alex Shi 141965c749 Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking"
Remove CONFIG_FAIR_GROUP_SCHED that covers the runnable info, then
we can use runnable load variables.

Also remove 2 CONFIG_FAIR_GROUP_SCHED setting which is not in reverted
patch(introduced in 9ee474f), but also need to revert.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51CA76A3.3050207@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:22 +02:00
James Bottomley a9e94ec350 This patch fixes a critical bug that was introduced in 3.9
related to VLAN tagging FCoE frames.
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Merge tag 'fcoe1' into fixes

This patch fixes a critical bug that was introduced in 3.9
related to VLAN tagging FCoE frames.
2013-06-26 23:08:22 -07:00
James Bottomley 36a279686b 3.10 fixes
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Merge tag 'fcoe' into fixes

3.10 fixes
2013-06-26 23:07:53 -07:00
Linus Torvalds 98b6ed0f2b Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Found via trinity:

    If you connect up an ipv6 socket to an ipv4 mapped address then an
    ipv6 one, sendmsg() can croak because ip6_sk_dst_check() assumes the
    route cached in the socket is an ipv6 one.  In this case there is an
    ipv4 route attached, so it gets stomped on.

    Reported by Dave Jones and Hannes Frederic Sowa, fixed by Eric
    Dumazet.

 2) AF_KEY notifications leak some kernel memory to userspace, fix from
    Mathias Krause.

 3) DLCI calls __dev_get_by_name() without proper locking, and dlci_del
    doesn't validate that the device being deleted is actually a DLCI
    one.  Fixes from Li Zefan.

 4) Length check on bluetooth l2cap information responses is wrong, each
    response type has a different lenth, so we should make sure it's in
    a given range rather than enforce one single valid length.  From
    Jaganath Kanakkassery.

 5) Receive FIFO overflow is really easy to trigger in stress scenerios
    in the sh_eth driver, but the event isn't being handled properly at
    all.  Specifically, the mask of error interrupts doesn't include the
    event so we never clear it, resulting in the driver becomming wedged
    processing an interrupt that never gets cleared.

    Fix from Sergei Shtylyov.

 6) qlcnic sleeps while holding a spinlock, use mdelay() instead of
    msleep().  From Shahed Shaikh.

 7) Missing curly braces causes SIP netfilter NAT module to always drop
    packets.  Fix from Balazs Peter Odor.

 8) ipt_ULOG in netfilter passes the wrong value to timer setup, causing
    the timer to dereference crap when it fires.  Fix from Gao Feng.

 9) Missing RCU protection around txq->axq_acq traversal in
    ath_txq_schedule().  Fix from Felix Fietkau.

10) Idle state transition test in ath9k_htc_config() is reversed, fix
    from Sujith Manoharan.

11) IPV6 forwarding handles unicast Router Alert packets incorrectly.
    It tests the wrong option state.  Previously opt->ra being non-zero
    indicated a router alert marking in the SKB, but now it's indicated
    by a bit in opt->flags.  Fix from YOSHIFUJI Hideaki.

12) SKB leak in GRE tunnel GSO handling, from Eric Dumazet.

13) get_user_pages_fast() error handling in TUN and MACVTAP use the same
    local variable for the base index and the loop iterator for page
    traversal, oops! Fix from Michael S Tsirkin.

14) ipv6_get_lladdr() can fail, and we must therefore check it's return
    value in inet6_set_iftoken().  For from Hannes Frederic Sowa.

15) If you change an interface name and meanwhile can sneak in something
    that looks up the name (like SO_BINDTODEVICE or SIOCGIFNAME) we can
    deadlock with CONFIG_PREEMPT=n.  Fix this by providing a helper
    function that properly uses raw_seqcount_begin().  From Nicolas
    Schichan.

16) Chain noise calibration test is inverted in iwlwifi, fix from
    Nikolay Martynov.

17) Properly set TX iwlwifi descriptor flags for back requests.  Fix
    from Emmanuel Grumbach.

18) We can't assume skb_transport_header() is set in xt_TCPOPTSTRAP
    module, fix from Pablo Neira Ayuso.

19) Some crummy APs don't provide the proper High Throughput info in
    association response frames.  Add a workaround by assume we'll use
    whatever is in the beacon/probe.  Fix from Johannes Berg.

20) mac80211 call to rate_idx_match_mask() swaps two arguments (mask and
    channel width).  Fix from Simon Wunderlich.

21) xt_TCPMSS (like xt_TCPOPTSTRAP) must not try to handle fragmented
    frames.  Fix from Phil Oester.

22) Fix rate control regression causing iwlwifi/iwlegacy chips to use
    1Mbit/s on pre-11n networks.  From Moshe Benji and Stanslaw Gruszka.

23) Disable brcmsmac power-save functions, they cause regressions.  From
    Arend van Spriel.

24) Enforce a sane minimum MTU in l2cap_build_cmd() otherwise we can
    easily crash.  Fix from Anderson Lizardo.

25) If a learning packet arrives during vxlan_stop() we crash, easily
    fixed by checking netif_running().  From Stephen Hemminger.

26) Static vxlan FDB entries should not be migrated, also from Stephen.

27) skb_clone() failures not handled in vxlan_xmit(), oops.  Also from
    Stephen.

28) Add minimal driver for AR816x/AR817x ethernet chips, from Johannes
    Berg.

29) Fix regression in userspace VLAN acceleration control, added by the
    802.1ad support changes.  Fix from Fernando Luis Vazquez Cao.

30) Interval selection for MLD queries in the bridging code was
    reversed.  Fix from Linus Lüssing.

31) ipv6's ndisc_send_redirect() erroneously writes to the packet we
    received not the packet we are building to send out.  Fix from
    Matthias Schiffer.

32) Don't free netdev before unregistering it, in usb_8dev can driver.
    From Marc Kleine-Budde.

33) Fix nl80211 attribute buffer races, from Johannes Berg.

34) Although netlink_diag.h is under uapi/ it isn't present in Kbuild.
    From Stephen Hemminger.

35) Wrong address and family passed to MD5 key lookups in TCP, from
    Aydin Arik.

36) phy_type attribute created by SFC driver should not be writable.
    From Ben Hutchings.

37) Receive/Transmit queue allocations in pxa168_eth and mv643xx_eth
    should use kzalloc().  Otherwise if setup fails half-way, we'll
    dereference garbage when trying to teardown the rings.  From Lubomir
    Rintel.

38) Fix double-allocation of dst (resulting in unfreeable net device) in
    ipv6's init_loopback().  From Gao Feng.

39) Fix fragmentation handling SKB leak in netfilter conntrack, we were
    freeing the wrong skb pointer.  From Phil Oester.

40) Don't report "-1" (SPEED_UNKNOWN) in bond_miimon_commit(), from
    Nikolay Aleksandrov.

41) davinci_cpdma doesn't check for DMA mapping errors, letting the
    device scribble to random addresses.  From Sebastian Siewior.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (69 commits)
  dlci: validate the net device in dlci_del()
  dlci: acquire rtnl_lock before calling __dev_get_by_name()
  af_key: fix info leaks in notify messages
  ipv6: ip6_sk_dst_check() must not assume ipv6 dst
  net: fix kernel deadlock with interface rename and netdev name retrieval.
  net/tg3: Avoid delay during MMIO access
  ipv6: check return value of ipv6_get_lladdr
  macvtap: fix recovery from gup errors
  tun: fix recovery from gup errors
  gre: fix a possible skb leak
  ipv6: Process unicast packet with Router Alert by checking flag in skb.
  ath9k_htc: Handle IDLE state transition properly
  ath9k: fix an RCU issue in calling ieee80211_get_tx_rates
  netfilter: ipt_ULOG: fix incorrect setting of ulog timer
  netfilter: ctnetlink: send event when conntrack label was modified
  netfilter: nf_nat_sip: fix mangling
  qlcnic: Do not sleep while holding spinlock
  drivers: net: cpsw: fix compilation error with cpsw driver
  tcp: doc : fix the syncookies default value
  sh_eth: fix misreporting of transmit abort
  ...
2013-06-26 19:24:37 -10:00
Linus Torvalds 1a506e4735 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull i915 drm fixes from Dave Airlie:
 "These should be the last two fixes for i915, one is for a fence leak
  killing X on some older GPUs, and one is a late regression partial
  revert for an swiotlb/xen/i915 interaction, Konrad has promised to
  figure out the proper answer, and this patch is the best thing to do
  at this stage to avoid regressing"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: make compact dma scatter lists creation work with SWIOTLB backend.
  drm/i915: Restore fences after resume and GPU resets
2013-06-26 19:23:15 -10:00
Zefan Li 578a1310f2 dlci: validate the net device in dlci_del()
We triggered an oops while running trinity with 3.4 kernel:

BUG: unable to handle kernel paging request at 0000000100000d07
IP: [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
PGD 640c0d067 PUD 0
Oops: 0000 [#1] PREEMPT SMP
CPU 3
...
Pid: 7302, comm: trinity-child3 Not tainted 3.4.24.09+ 40 Huawei Technologies Co., Ltd. Tecal RH2285          /BC11BTSA
RIP: 0010:[<ffffffffa0109738>]  [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
...
Call Trace:
  [<ffffffff8137c5c3>] sock_ioctl+0x153/0x280
  [<ffffffff81195494>] do_vfs_ioctl+0xa4/0x5e0
  [<ffffffff8118354a>] ? fget_light+0x3ea/0x490
  [<ffffffff81195a1f>] sys_ioctl+0x4f/0x80
  [<ffffffff81478b69>] system_call_fastpath+0x16/0x1b
...

It's because the net device is not a dlci device.

Reported-by: Li Jinyue <lijinyue@huawei.com>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26 15:36:42 -07:00
Zefan Li 11eb2645cb dlci: acquire rtnl_lock before calling __dev_get_by_name()
Otherwise the net device returned can be freed at anytime.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26 15:36:42 -07:00
Mathias Krause a5cc68f3d6 af_key: fix info leaks in notify messages
key_notify_sa_flush() and key_notify_policy_flush() miss to initialize
the sadb_msg_reserved member of the broadcasted message and thereby
leak 2 bytes of heap memory to listeners. Fix that.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26 15:15:54 -07:00
Eric Dumazet a963a37d38 ipv6: ip6_sk_dst_check() must not assume ipv6 dst
It's possible to use AF_INET6 sockets and to connect to an IPv4
destination. After this, socket dst cache is a pointer to a rtable,
not rt6_info.

ip6_sk_dst_check() should check the socket dst cache is IPv6, or else
various corruptions/crashes can happen.

Dave Jones can reproduce immediate crash with
trinity -q -l off -n -c sendmsg -c connect

With help from Hannes Frederic Sowa

Reported-by: Dave Jones <davej@redhat.com>
Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26 15:13:47 -07:00
Jacob Shin 9608d33b82 x86, microcode, amd: Another early loading fixup
commit cd1c32ca96 is an early premature
rendition of the patch. Augment it with this delta patch to:
  * correctly mark offset and size of the matching bin file
  * use __pa instead of __pa_nodebug during AP load
  * check for !initrd_start before using it

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Link: http://lkml.kernel.org/r/20130620152414.GA6676@jshin-Toonie
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-26 14:55:37 -07:00