tmp_suning_uos_patched/include
Josef Bacik e07f7183a4 jbd2: improve jbd2 fsync batching
This patch removes the static sleep time in favor of a more self
optimizing approach where we measure the average amount of time it
takes to commit a transaction to disk and the ammount of time a
transaction has been running.  If somebody does a sync write or an
fsync() traditionally we would sleep for 1 jiffies, which depending on
the value of HZ could be a significant amount of time compared to how
long it takes to commit a transaction to the underlying storage.  With
this patch instead of sleeping for a jiffie, we check to see if the
amount of time this transaction has been running is less than the
average commit time, and if it is we sleep for the delta using
schedule_hrtimeout to give us a higher precision sleep time.  This
greatly benefits high end storage where you could end up sleeping for
longer than it takes to commit the transaction and therefore sitting
idle instead of allowing the transaction to be committed by keeping
the sleep time to a minimum so you are sure to always be doing
something.

Signed-off-by: Josef Bacik <jbacik@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-11-26 01:14:26 -05:00
..
acpi cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t 2009-01-03 19:15:40 +01:00
asm-arm
asm-frv frv: define __fls 2009-01-03 16:14:05 +10:30
asm-generic Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-02 11:44:09 -08:00
asm-h8300
asm-m32r m32r: define __fls 2009-01-03 16:16:54 +10:30
asm-m68k m68k: define __fls 2009-01-01 10:12:18 +10:30
asm-mn10300 mn10300: define __fls 2009-01-03 16:19:03 +10:30
asm-xtensa xtensa: define __fls 2009-01-03 16:21:08 +10:30
crypto crypto: aes - Precompute tables 2008-12-25 11:05:13 +11:00
drm drm: Add a debug node for vblank state. 2008-12-29 17:47:27 +10:00
keys
linux jbd2: improve jbd2 fsync batching 2008-11-26 01:14:26 -05:00
math-emu
media V4L/DVB (10141): v4l2: debugging API changed to match against driver name instead of ID. 2009-01-02 17:11:52 -02:00
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2008-12-28 12:49:40 -08:00
pcmcia
rdma
rxrpc
scsi [SCSI] fcoe: Fibre Channel over Ethernet 2008-12-29 11:24:33 -06:00
sound V4L/DVB (10135): v4l2: introduce v4l2_file_operations. 2009-01-02 17:11:12 -02:00
trace sched, trace: update trace_sched_wakeup() 2008-12-25 13:10:21 +01:00
video video: sh_mobile_lcdcfb deferred io support 2008-12-22 18:44:48 +09:00
xen xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
Kbuild