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Philipp Reisner 99432fcc52 drbd: Take a more conservative approach when deciding max_bio_size 
The old (optimistic) implementation could shrink the bio size
on an primary device.

Shrinking the bio size on a primary device is bad. Since there
we might get BIOs with the old (bigger) size shortly after
we published the new size.

The new implementation is more conservative, and eventually
increases the max_bio_size on a primary device (which is valid).
It does so, when it knows the local limit AND the remote limit.

 We cache the last seen max_bio_size of the peer in the meta
 data, and rely on that, to make the operation of single
 nodes more efficient.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
 		2011-05-24 10:08:58 +02:00
..
aoe drivers/block/aoe/Makefile: replace the use of <module>-objs with <module>-y 2011-01-19 08:25:02 -07:00
drbd drbd: Take a more conservative approach when deciding max_bio_size 2011-05-24 10:08:58 +02:00
paride block: don't block events on excl write for non-optical devices 2011-04-21 20:54:46 +02:00
xen-blkback xen/blkback: don't fail empty barrier requests 2011-05-18 11:28:16 -04:00
DAC960.c Fix common misspellings 2011-03-31 11:26:23 -03:00
DAC960.h Fix DAC960 driver on machines which don't support 64-bit DMA 2007-09-11 17:21:19 -07:00
Kconfig xen/blkback: Flesh out the description in the Kconfig. 2011-05-12 17:55:40 -04:00
Makefile xen/blkback: Move it from drivers/xen to drivers/block 2011-04-18 14:30:26 -04:00
amiflop.c Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block 2011-03-24 10:16:26 -07:00
ataflop.c floppy,{ami|ata}flop: Convert to bdops->check_events() 2011-03-09 19:54:27 +01:00
brd.c Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
cciss.c cciss: fix compile issue 2011-05-06 08:27:00 -06:00
cciss.h cciss: increase timeouts for post-reset no-ops 2011-05-06 08:23:54 -06:00
cciss_cmd.h cciss: use new doorbell-bit-5 reset method 2011-05-06 08:23:55 -06:00
cciss_scsi.c cciss: add cciss_tape_cmds module paramter 2011-05-06 08:23:59 -06:00
cciss_scsi.h cciss: add cciss_tape_cmds module paramter 2011-05-06 08:23:59 -06:00
cpqarray.c block: remove per-queue plugging 2011-03-10 08:52:07 +01:00
cpqarray.h
…
cryptoloop.c drivers: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:32 -04:00
floppy.c Merge branch 'for-2.6.39/stack-plug' into for-2.6.39/core 2011-03-10 08:58:35 +01:00
hd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ida_cmd.h
…
ida_ioctl.h
…
loop.c Merge branch 'for-2.6.39/stack-plug' into for-2.6.39/core 2011-03-10 08:58:35 +01:00
mg_disk.c block: switch s390 tape_block and mg_disk to elevator_change() 2010-08-23 14:02:44 +02:00
nbd.c nbd: remove module-level ioctl mutex 2011-02-11 16:12:20 -08:00
osdblk.c block: remove spurious uses of REQ_HARDBARRIER 2010-09-10 12:35:36 +02:00
pktcdvd.c Merge branch 'for-2.6.39/stack-plug' into for-2.6.39/core 2011-03-10 08:58:35 +01:00
ps3disk.c Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
ps3vram.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
rbd.c rbd: use watch/notify for changes in rbd header 2011-03-22 11:33:56 -07:00
rbd_types.h rbd: introduce rados block device (rbd), based on libceph 2010-10-20 15:38:13 -07:00
smart1,2.h fix typos 'comamnd' -> 'command' in comments 2011-02-02 11:31:21 +01:00
sunvdc.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
swim.c swim[3]: Convert to bdops->check_events() 2011-03-09 19:54:28 +01:00
swim3.c swim[3]: Convert to bdops->check_events() 2011-03-09 19:54:28 +01:00
swim_asm.S m68k: mac - Add SWIM floppy support 2009-03-26 21:15:27 +01:00
sx8.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
ub.c ub: Convert to bdops->check_events() 2011-03-09 19:54:28 +01:00
umem.c Merge branch 'for-2.6.39/stack-plug' into for-2.6.39/core 2011-03-10 08:58:35 +01:00
umem.h drivers/block/umem: trim trailing whitespace 2007-10-10 09:25:59 +02:00
viodasd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
virtio_blk.c Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
xd.c block: autoconvert trivial BKL users to private mutex 2010-10-05 15:01:10 +02:00
xd.h [PATCH] switch xd 2008-10-21 07:48:11 -04:00
xen-blkfront.c xen-blkfront: Introduce BLKIF_OP_FLUSH_DISKCACHE support. 2011-05-12 08:56:03 -04:00
xsysace.c Fix common misspellings 2011-03-31 11:26:23 -03:00
z2ram.c drivers/block/z2ram.c: correct printing of sector_t 2010-10-28 06:15:26 -06:00