We don't need to force to write dirty_exceeded for f2fs_balance_fs_bg.
This flag was only meaningful to write bypassing conditions.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Merge misc fixes from Andrew Morton:
"12 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm, vmscan: prevent kswapd livelock due to pfmemalloc-throttled process being killed
memcg: fix destination cgroup leak on task charges migration
mm: memcontrol: switch soft limit default back to infinity
mm/debug_pagealloc: remove obsolete Kconfig options
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
arch/blackfin/mach-bf533/boards/stamp.c: add linux/delay.h
ocfs2: fix the wrong directory passed to ocfs2_lookup_ino_from_name() when link file
MAINTAINERS: update rydberg's addresses
mm: protect set_page_dirty() from ongoing truncation
mm: prevent endless growth of anon_vma hierarchy
exit: fix race between wait_consider_task() and wait_task_zombie()
ocfs2: remove bogus check in dlm_process_recovery_data
Charles Shirron and Paul Cassella from Cray Inc have reported kswapd
stuck in a busy loop with nothing left to balance, but
kswapd_try_to_sleep() failing to sleep. Their analysis found the cause
to be a combination of several factors:
1. A process is waiting in throttle_direct_reclaim() on pgdat->pfmemalloc_wait
2. The process has been killed (by OOM in this case), but has not yet been
scheduled to remove itself from the waitqueue and die.
3. kswapd checks for throttled processes in prepare_kswapd_sleep():
if (waitqueue_active(&pgdat->pfmemalloc_wait)) {
wake_up(&pgdat->pfmemalloc_wait);
return false; // kswapd will not go to sleep
}
However, for a process that was already killed, wake_up() does not remove
the process from the waitqueue, since try_to_wake_up() checks its state
first and returns false when the process is no longer waiting.
4. kswapd is running on the same CPU as the only CPU that the process is
allowed to run on (through cpus_allowed, or possibly single-cpu system).
5. CONFIG_PREEMPT_NONE=y kernel is used. If there's nothing to balance, kswapd
encounters no voluntary preemption points and repeatedly fails
prepare_kswapd_sleep(), blocking the process from running and removing
itself from the waitqueue, which would let kswapd sleep.
So, the source of the problem is that we prevent kswapd from going to
sleep until there are processes waiting on the pfmemalloc_wait queue,
and a process waiting on a queue is guaranteed to be removed from the
queue only when it gets scheduled. This was done to make sure that no
process is left sleeping on pfmemalloc_wait when kswapd itself goes to
sleep.
However, it isn't necessary to postpone kswapd sleep until the
pfmemalloc_wait queue actually empties. To prevent processes from being
left sleeping, it's actually enough to guarantee that all processes
waiting on pfmemalloc_wait queue have been woken up by the time we put
kswapd to sleep.
This patch therefore fixes this issue by substituting 'wake_up' with
'wake_up_all' and removing 'return false' in the code snippet from
prepare_kswapd_sleep() above. Note that if any process puts itself in
the queue after this waitqueue_active() check, or after the wake up
itself, it means that the process will also wake up kswapd - and since
we are under prepare_to_wait(), the wake up won't be missed. Also we
update the comment prepare_kswapd_sleep() to hopefully more clearly
describe the races it is preventing.
Fixes: 5515061d22 ("mm: throttle direct reclaimers if PF_MEMALLOC reserves are low and swap is backed by network storage")
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org> [3.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We are supposed to take one css reference per each memory page and per
each swap entry accounted to a memory cgroup. However, during task
charges migration we take a reference to the destination cgroup twice
per each swap entry: first in mem_cgroup_do_precharge()->try_charge()
and then in mem_cgroup_move_swap_account(), permanently leaking the
destination cgroup.
The hunk taking the second reference seems to be a leftover from the
pre-00501b531c472 ("mm: memcontrol: rewrite charge API") era. Remove it
to fix the leak.
Fixes: e8ea14cc6e (mm: memcontrol: take a css reference for each charged page)
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 3e32cb2e0a ("mm: memcontrol: lockless page counters")
accidentally switched the soft limit default from infinity to zero,
which turns all memcgs with even a single page into soft limit excessors
and engages soft limit reclaim on all of them during global memory
pressure. This makes global reclaim generally more aggressive, but also
inverts the meaning of existing soft limit configurations where unset
soft limits are usually more generous than set ones.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These are obsolete since commit e30825f186 ("mm/debug-pagealloc:
prepare boottime configurable") was merged. So remove them.
[pebolle@tiscali.nl: find obsolete Kconfig options]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Dave Hansen <dave@sr71.net>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Jungsoo Son <jungsoo.son@lge.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix clashing values for O_PATH and FMODE_NONOTIFY on sparc. The
clashing O_PATH value was added in commit 5229645bdc ("vfs: add
nonconflicting values for O_PATH") but this can't be changed as it is
user-visible.
FMODE_NONOTIFY is only used internally in the kernel, but it is in the
same numbering space as the other O_* flags, as indicated by the comment
at the top of include/uapi/asm-generic/fcntl.h (and its use in
fs/notify/fanotify/fanotify_user.c). So renumber it to avoid the clash.
All of this has happened before (commit 12ed2e36c98a: "fanotify:
FMODE_NONOTIFY and __O_SYNC in sparc conflict"), and all of this will
happen again -- so update the uniqueness check in fcntl_init() to
include __FMODE_NONOTIFY.
Signed-off-by: David Drysdale <drysdale@google.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In ocfs2_link(), the parent directory inode passed to function
ocfs2_lookup_ino_from_name() is wrong. Parameter dir is the parent of
new_dentry not old_dentry. We should get old_dir from old_dentry and
lookup old_dentry in old_dir in case another node remove the old dentry.
With this change, hard linking works again, when paths are relative with
at least one subdirectory. This is how the problem was reproducable:
# mkdir a
# mkdir b
# touch a/test
# ln a/test b/test
ln: failed to create hard link `b/test' => `a/test': No such file or directory
However when creating links in the same dir, it worked well.
Now the link gets created.
Fixes: 0e048316ff ("ocfs2: check existence of old dentry in ocfs2_link()")
Signed-off-by: joyce.xue <xuejiufei@huawei.com>
Reported-by: Szabo Aron - UBIT <aron@ubit.hu>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Tested-by: Aron Szabo <aron@ubit.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
My ISP finally gave up on the old mail address, so I am moving things
over to bitmath.org instead. Also change the status fields to better
reflect reality.
Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tejun, while reviewing the code, spotted the following race condition
between the dirtying and truncation of a page:
__set_page_dirty_nobuffers() __delete_from_page_cache()
if (TestSetPageDirty(page))
page->mapping = NULL
if (PageDirty())
dec_zone_page_state(page, NR_FILE_DIRTY);
dec_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
if (page->mapping)
account_page_dirtied(page)
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
which results in an imbalance of NR_FILE_DIRTY and BDI_RECLAIMABLE.
Dirtiers usually lock out truncation, either by holding the page lock
directly, or in case of zap_pte_range(), by pinning the mapcount with
the page table lock held. The notable exception to this rule, though,
is do_wp_page(), for which this race exists. However, do_wp_page()
already waits for a locked page to unlock before setting the dirty bit,
in order to prevent a race where clear_page_dirty() misses the page bit
in the presence of dirty ptes. Upgrade that wait to a fully locked
set_page_dirty() to also cover the situation explained above.
Afterwards, the code in set_page_dirty() dealing with a truncation race
is no longer needed. Remove it.
Reported-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Constantly forking task causes unlimited grow of anon_vma chain. Each
next child allocates new level of anon_vmas and links vma to all
previous levels because pages might be inherited from any level.
This patch adds heuristic which decides to reuse existing anon_vma
instead of forking new one. It adds counter anon_vma->degree which
counts linked vmas and directly descending anon_vmas and reuses anon_vma
if counter is lower than two. As a result each anon_vma has either vma
or at least two descending anon_vmas. In such trees half of nodes are
leafs with alive vmas, thus count of anon_vmas is no more than two times
bigger than count of vmas.
This heuristic reuses anon_vmas as few as possible because each reuse
adds false aliasing among vmas and rmap walker ought to scan more ptes
when it searches where page is might be mapped.
Link: http://lkml.kernel.org/r/20120816024610.GA5350@evergreen.ssec.wisc.edu
Fixes: 5beb493052 ("mm: change anon_vma linking to fix multi-process server scalability issue")
[akpm@linux-foundation.org: fix typo, per Rik]
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-by: Daniel Forrest <dan.forrest@ssec.wisc.edu>
Tested-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Jerome Marchand <jmarchan@redhat.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org> [2.6.34+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
wait_consider_task() checks EXIT_ZOMBIE after EXIT_DEAD/EXIT_TRACE and
both checks can fail if we race with EXIT_ZOMBIE -> EXIT_DEAD/EXIT_TRACE
change in between, gcc needs to reload p->exit_state after
security_task_wait(). In this case ->notask_error will be wrongly
cleared and do_wait() can hang forever if it was the last eligible
child.
Many thanks to Arne who carefully investigated the problem.
Note: this bug is very old but it was pure theoretical until commit
b3ab03160d ("wait: completely ignore the EXIT_DEAD tasks"). Before
this commit "-O2" was probably enough to guarantee that compiler won't
read ->exit_state twice.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Arne Goedeke <el@laramies.com>
Tested-by: Arne Goedeke <el@laramies.com>
Cc: <stable@vger.kernel.org> [3.15+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In dlm_process_recovery_data, only when dlm_new_lock failed the ret will
be set to -ENOMEM. And in this case, newlock is definitely NULL. So
test newlock is meaningless, remove it.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Alex Chen <alex.chen@huawei.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull kbuild fix from Michal Marek:
"make mrproper / distclean stopped removing the generated debian/
directory in v3.16. This fixes it"
* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kbuild: Fix removal of the debian/ directory
The introduction of the uapi directories in v3.7-rc1 moved some of the
generated headers from arch/*/include/generated to the uapi directory,
keeping the #include directives intact.
This creates a problem when bisecting, because the unversioned files are
not cleaned automatically by git and the compiler might include stale
headers as a result. Instead of cleaning them in the Makefiles, promote
arch/*/include/generated/uapi in the search path. Under normal
circumstances, there is no overlap between this uapi subdirectory and
its parent, so the include choices remain the same. We keep
arch/*/include/generated/uapi in the USERINCLUDE variable so that it is
usable standalone.
Note that we cannot completely swap the order of the uapi and
kernel-only directories, since the headers in include/uapi/asm-generic
are meant to be wrapped by their include/asm-generic counterparts when
building kernel code.
Reported-by: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Reported-by: David Drysdale <dmd@lurklurk.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
and STi drivers.
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Merge tag 'pinctrl-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij:
"Allright allright I've been lazy over christmas and New Years. Here
are a few collected pin control fixes eventually. Details:
A set of assorted pin control fixes for the Rockchip and STi drivers"
* tag 'pinctrl-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: st: Add irq_disable hook to st_gpio_irqchip
pinctrl: st: avoid multiple mutex lock
pinctrl: rockchip: Fix enable/disable/mask/unmask
pinctrl: rockchip: Handle wakeup pins
- Fix ACPI power management intialization for device objects
corresponding to devices that are not present at the init time
(the _STA control method returns 0 for them) and therefore should
not be regarded as power manageable (Rafael J Wysocki).
- Rename a structure field and two functions used by the ACPI
processor driver to make them less tied to architectures that
use APICs (both x86 and ia64) and more suitable for ARM64
processors (Hanjun Guo).
- Add a disable_native_backlight quirk for Dell XPS15 L521X
designed in an unusual way preventing native backlight from
working on that machine (Hans de Goede).
/
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Merge tag 'pm+acpi-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"These are an ACPI device power management initialization fix (-stable
material), two commits renaming stuff in the ACPI processor driver to
make it more suitable for ARM64 processors and a new ACPI backlight
blacklist entry.
Specifics:
- Fix ACPI power management intialization for device objects
corresponding to devices that are not present at the init time (the
_STA control method returns 0 for them) and therefore should not be
regarded as power manageable (Rafael J Wysocki).
- Rename a structure field and two functions used by the ACPI
processor driver to make them less tied to architectures that use
APICs (both x86 and ia64) and more suitable for ARM64 processors
(Hanjun Guo).
- Add a disable_native_backlight quirk for Dell XPS15 L521X designed
in an unusual way preventing native backlight from working on that
machine (Hans de Goede)"
* tag 'pm+acpi-3.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
ACPI / processor: Convert apic_id to phys_id to make it arch agnostic
ACPI / PM: Fix PM initialization for devices that are not present
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Merge tag 'keys-fixes-20150107' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull keyrings fixes from David Howells:
"Two fixes:
- Fix for the order in which things are done during key garbage
collection to prevent named keyrings causing a crash
[CVE-2014-9529].
- Fix assoc_array to explicitly #include rcupdate.h to prevent
compilation errors under certain circumstances"
* tag 'keys-fixes-20150107' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
assoc_array: Include rcupdate.h for call_rcu() definition
KEYS: close race between key lookup and freeing
This fixes a couple of bugs triggered by hot-unplug
of virtio devices, as well as a regression in vhost-net.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
pull virtio/vhost fixes from Michael Tsirkin:
"This fixes a couple of bugs triggered by hot-unplug of virtio devices,
as well as a regression in vhost-net"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost/net: length miscalculation
virtio_pci: document why we defer kfree
virtio_pci: defer kfree until release callback
virtio_pci: device-specific release callback
virtio: make del_vqs idempotent
Including:
* A domain structure leak fix in the Intel VT-d driver
* Compile error fix for the VMSA IPMMU driver because of the
IOMMU_EXEC -> IOMMU_NOEXEC conversion
* Two small cleanups as an aftermath of the merge window and the
domain-leak fix
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Merge tag 'iommu-fixes-v3.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Including:
- a domain structure leak fix in the Intel VT-d driver
- compile error fix for the VMSA IPMMU driver because of the
IOMMU_EXEC -> IOMMU_NOEXEC conversion
- two small cleanups as an aftermath of the merge window and the
domain-leak fix"
* tag 'iommu-fixes-v3.19-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/rockchip: Drop owner assignment from platform_drivers
iommu/vt-d: Remove dead code in device_notifier
iommu/vt-d: Fix dmar_domain leak in iommu_attach_device
iommu/ipmmu-vmsa: Change IOMMU_EXEC to IOMMU_NOEXEC
Pull crypto fixes from Herbert Xu:
"This fixes a build problem with sha-mb with old toolchains and an
implementation bug in the ctr(aes)/by8 branch of aesni-intel that's
enabled when AVX is available"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: sha-mb - Add avx2_supported check.
crypto: aesni - fix "by8" variant for 128 bit keys
Include rcupdate.h header to provide call_rcu() definition. This was implicitly
being provided by slab.h file which include srcu.h somewhere in its include
hierarchy which in-turn included rcupdate.h.
Lately, tinification effort added support to remove srcu entirely because of
which we are encountering build errors like
lib/assoc_array.c: In function 'assoc_array_apply_edit':
lib/assoc_array.c:1426:2: error: implicit declaration of function 'call_rcu' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
Fix these by including rcupdate.h explicitly.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Reported-by: Scott Wood <scottwood@freescale.com>
commit 8b38694a2d
vhost/net: virtio 1.0 byte swap
had this chunk:
- heads[headcount - 1].len += datalen;
+ heads[headcount - 1].len = cpu_to_vhost32(vq, len - datalen);
This adds datalen with the wrong sign, causing guest panics.
Fixes: 8b38694a2d
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Suggested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Currently disable_irq() doesn't work for pinctrl-st driver, due to
missing irq_disable hook in the driver.
disable_irq() is required only for level-triggered interrupts, which
is not the case normally.
Signed-off-by: Pankaj Dev <pankaj.dev@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using the sysfs inteface to inspect the pins configuration
the system can walk around a path which acquires the same
mutex twice.
On STiH407 platform, for example :
cat /sys/kernel/debug/pinctrl/920f080.pin-controller-front0/pinconf-pins
hangs the kernel and never returns.
With this patch the mutex is temporary freed.
Signed-off-by: Francesco Virlinzi <francesco.virlinzi@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pull networking fixes from David Miller:
"Just a pile of random fixes, including:
1) Do not apply TSO limits to non-TSO packets, fix from Herbert Xu.
2) MDI{,X} eeprom check in e100 driver is reversed, from John W.
Linville.
3) Missing error return assignments in several ethernet drivers, from
Julia Lawall.
4) Altera TSE device doesn't come back up after ifconfig down/up
sequence, fix from Kostya Belezko.
5) Add more cases to the check for whether the qmi_wwan device has a
bogus MAC address and needs to be assigned a random one. From
Kristian Evensen.
6) Fix interrupt hangs in CPSW, from Felipe Balbi.
7) Implement ndo_features_check in r8152 so that the stack doesn't
feed GSO packets which are outside of the chip's capabilities.
From Hayes Wang"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
qla3xxx: don't allow never end busy loop
xen-netback: fixing the propagation of the transmit shaper timeout
r8152: support ndo_features_check
batman-adv: fix potential TT client + orig-node memory leak
batman-adv: fix multicast counter when purging originators
batman-adv: fix counter for multicast supporting nodes
batman-adv: fix lock class for decoding hash in network-coding.c
batman-adv: fix delayed foreign originator recognition
batman-adv: fix and simplify condition when bonding should be used
Revert "mac80211: Fix accounting of the tailroom-needed counter"
net: ethernet: cpsw: fix hangs with interrupts
enic: free all rq buffs when allocation fails
qmi_wwan: Set random MAC on devices with buggy fw
openvswitch: Consistently include VLAN header in flow and port stats.
tcp: Do not apply TSO segment limit to non-TSO packets
Altera TSE: Add missing phydev
net/mlx4_core: Fix error flow in mlx4_init_hca()
net/mlx4_core: Correcly update the mtt's offset in the MR re-reg flow
qlcnic: Fix return value in qlcnic_probe()
net: axienet: fix error return code
...
The counter variable wasn't increased at all which may stuck under
certain circumstances.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* acpi-pm:
ACPI / PM: Fix PM initialization for devices that are not present
* acpi-processor:
ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
ACPI / processor: Convert apic_id to phys_id to make it arch agnostic
* acpi-video:
ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
The L521X variant of the Dell XPS15 has integrated nvidia graphics, and
backlight control does not work properly when using the native interfaces.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1163574
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ext4 to handle ext3 file systems, plus two minor bug fixes.
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o:
"Revert a potential seek_data/hole regression which shows up when using
ext4 to handle ext3 file systems, plus two minor bug fixes"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: remove spurious KERN_INFO from ext4_warning call
Revert "ext4: fix suboptimal seek_{data,hole} extents traversial"
ext4: prevent online resize with backup superblock
Jay Foad reports that the address sanitizer test (asan) sometimes gets
confused by a stack pointer that ends up being outside the stack vma
that is reported by /proc/maps.
This happens due to an interaction between RLIMIT_STACK and the guard
page: when we do the guard page check, we ignore the potential error
from the stack expansion, which effectively results in a missing guard
page, since the expected stack expansion won't have been done.
And since /proc/maps explicitly ignores the guard page (commit
d7824370e263: "mm: fix up some user-visible effects of the stack guard
page"), the stack pointer ends up being outside the reported stack area.
This is the minimal patch: it just propagates the error. It also
effectively makes the guard page part of the stack limit, which in turn
measn that the actual real stack is one page less than the stack limit.
Let's see if anybody notices. We could teach acct_stack_growth() to
allow an extra page for a grow-up/grow-down stack in the rlimit test,
but I don't want to add more complexity if it isn't needed.
Reported-and-tested-by: Jay Foad <jay.foad@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- ensure bonding is used (if enabled) for packets coming in the soft
interface
- fix race condition to avoid orig_nodes to be deleted right after
being added
- avoid false positive lockdep splats by assigning lockclass to
the proper hashtable lock objects
- avoid miscounting of multicast 'disabled' nodes in the network
- fix memory leak in the Global Translation Table in case of
originator interval change
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge
Included changes:
- ensure bonding is used (if enabled) for packets coming in the soft
interface
- fix race condition to avoid orig_nodes to be deleted right after
being added
- avoid false positive lockdep splats by assigning lockclass to
the proper hashtable lock objects
- avoid miscounting of multicast 'disabled' nodes in the network
- fix memory leak in the Global Translation Table in case of
originator interval change
Signed-off-by: David S. Miller <davem@davemloft.net>
Since e9ce7cb6b1 ("xen-netback: Factor queue-specific data into queue struct"),
the transimt shaper timeout is always set to 0. The value the user sets via
xenbus is never propagated to the transmit shaper.
This patch fixes the issue.
Cc: Anthony Liguori <aliguori@amazon.com>
Signed-off-by: Imre Palik <imrep@amazon.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
p54 and cw2100 drivers (arguably due to bad assumptions there.)
Since this affects kernels since 3.17, I decided to revert for
now and we'll revisit this optimisation properly for -next.
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Merge tag 'mac80211-for-davem-2015-01-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Here's just a single fix - a revert of a patch that broke the
p54 and cw2100 drivers (arguably due to bad assumptions there.)
Since this affects kernels since 3.17, I decided to revert for
now and we'll revisit this optimisation properly for -next.
Signed-off-by: David S. Miller <davem@davemloft.net>
Support ndo_features_check to avoid:
- the transport offset is more than the hw limitation when using hw checksum.
- the skb->len of a GSO packet is more than the limitation.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The reason we defer kfree until release function is because it's a
general rule for kobjects: kfree of the reference counter itself is only
legal in the release function.
Previous patch didn't make this clear, document this in code.
Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
A struct device which has just been unregistered can live on past the
point at which a driver decides to drop it's initial reference to the
kobject gained on allocation.
This implies that when releasing a virtio device, we can't free a struct
virtio_device until the underlying struct device has been released,
which might not happen immediately on device_unregister().
Unfortunately, this is exactly what virtio pci does:
it has an empty release callback, and frees memory immediately
after unregistering the device.
This causes an easy to reproduce crash if CONFIG_DEBUG_KOBJECT_RELEASE
it enabled.
To fix, free the memory only once we know the device is gone in the release
callback.
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
It turns out we need to add device-specific code
in release callback. Move it to virtio_pci_legacy.c.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This patch fixes a potential memory leak which can occur once an
originator times out. On timeout the according global translation table
entry might not get purged correctly. Furthermore, the non purged TT
entry will cause its orig-node to leak, too. Which additionally can lead
to the new multicast optimization feature not kicking in because of a
therefore bogus counter.
In detail: The batadv_tt_global_entry->orig_list holds the reference to
the orig-node. Usually this reference is released after
BATADV_PURGE_TIMEOUT through: _batadv_purge_orig()->
batadv_purge_orig_node()->batadv_update_route()->_batadv_update_route()->
batadv_tt_global_del_orig() which purges this global tt entry and
releases the reference to the orig-node.
However, if between two batadv_purge_orig_node() calls the orig-node
timeout grew to 2*BATADV_PURGE_TIMEOUT then this call path isn't
reached. Instead the according orig-node is removed from the
originator hash in _batadv_purge_orig(), the batadv_update_route()
part is skipped and won't be reached anymore.
Fixing the issue by moving batadv_tt_global_del_orig() out of the rcu
callback.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Acked-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
When purging an orig_node we should only decrease counter tracking the
number of nodes without multicast optimizations support if it was
increased through this orig_node before.
A not yet quite initialized orig_node (meaning it did not have its turn
in the mcast-tvlv handler so far) which gets purged would not adhere to
this and will lead to a counter imbalance.
Fixing this by adding a check whether the orig_node is mcast-initalized
before decreasing the counter in the mcast-orig_node-purging routine.
Introduced by 60432d756c
("batman-adv: Announce new capability via multicast TVLV")
Reported-by: Tobias Hachmer <tobias@hachmer.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
A miscounting of nodes having multicast optimizations enabled can lead
to multicast packet loss in the following scenario:
If the first OGM a node receives from another one has no multicast
optimizations support (no multicast tvlv) then we are missing to
increase the counter. This potentially leads to the wrong assumption
that we could safely use multicast optimizations.
Fixings this by increasing the counter if the initial OGM has the
multicast TVLV unset, too.
Introduced by 60432d756c
("batman-adv: Announce new capability via multicast TVLV")
Reported-by: Tobias Hachmer <tobias@hachmer.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
batadv_has_set_lock_class() is called with the wrong hash table as first
argument (probably due to a copy-paste error), which leads to false
positives when running with lockdep.
Introduced-by: 612d2b4fe0
("batman-adv: network coding - save overheard and tx packets for decoding")
Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Currently it can happen that the reception of an OGM from a new
originator is not being accepted. More precisely it can happen that
an originator struct gets allocated and initialized
(batadv_orig_node_new()), even the TQ gets calculated and set correctly
(batadv_iv_ogm_calc_tq()) but still the periodic orig_node purging
thread will decide to delete it if it has a chance to jump between
these two function calls.
This is because batadv_orig_node_new() initializes the last_seen value
to zero and its caller (batadv_iv_ogm_orig_get()) makes it visible to
other threads by adding it to the hash table already.
batadv_iv_ogm_calc_tq() will set the last_seen variable to the correct,
current time a few lines later but if the purging thread jumps in between
that it will think that the orig_node timed out and will wrongly
schedule it for deletion already.
If the purging interval is the same as the originator interval (which is
the default: 1 second), then this game can continue for several rounds
until the random OGM jitter added enough difference between these
two (in tests, two to about four rounds seemed common).
Fixing this by initializing the last_seen variable of an orig_node
to the current time before adding it to the hash table.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
The current condition actually does NOT consider bonding when the
interface the packet came in from is the soft interface, which is the
opposite of what it should do (and the comment describes). Fix that and
slightly simplify the condition.
Reported-by: Ray Gibson <booray@gmail.com>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Jaegeuk Kim