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Vivek Goyal 32f2e807a3 cfq-iosched: reset oom_cfqq in cfq_set_request() 
In case memory is scarce, we now default to oom_cfqq. Once memory is
available again, we should allocate a new cfqq and stop using oom_cfqq for
a particular io context.

Once a new request comes in, check if we are using oom_cfqq, and if yes,
try to allocate a new cfqq.

Tested the patch by forcing the use of oom_cfqq and upon next request thread
realized that it was using oom_cfqq and it allocated a new cfqq.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-07-10 20:31:54 +02:00
..
as-iosched.c block: convert to pos and nr_sectors accessors 2009-05-11 09:50:54 +02:00
blk-barrier.c block: Use accessor functions for queue limits 2009-05-22 23:22:54 +02:00
blk-core.c blocK: Restore barrier support for md and probably other virtual devices. 2009-07-01 10:56:26 +02:00
blk-exec.c block: don't set REQ_NOMERGE unnecessarily 2009-04-28 07:37:33 +02:00
blk-integrity.c block: Do away with the notion of hardsect_size 2009-05-22 23:22:54 +02:00
blk-ioc.c block: prevent possible io_context->refcount overflow 2009-06-10 23:07:15 +02:00
blk-map.c block: Use accessor functions for queue limits 2009-05-22 23:22:54 +02:00
blk-merge.c block: don't merge requests of different failfast settings 2009-07-03 21:06:45 +02:00
blk-settings.c Fix kernel-doc parameter name typo in blk-settings.c: 2009-06-19 09:18:32 +02:00
blk-softirq.c generic-ipi: remove CSD_FLAG_WAIT 2009-02-25 14:13:44 +01:00
blk-sysfs.c Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block 2009-06-11 11:10:35 -07:00
blk-tag.c block: change the tag sync vs async restriction logic 2009-05-20 08:54:31 +02:00
blk-timeout.c block: clean up misc stuff after block layer timeout conversion 2009-04-28 07:37:34 +02:00
blk.h block: fix no diskstat problem 2009-05-27 14:50:02 +02:00
bsg.c block: get rid of queue-private command filter 2009-07-01 10:56:26 +02:00
cfq-iosched.c cfq-iosched: reset oom_cfqq in cfq_set_request() 2009-07-10 20:31:54 +02:00
compat_ioctl.c Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block 2009-06-11 11:10:35 -07:00
deadline-iosched.c block: convert to pos and nr_sectors accessors 2009-05-11 09:50:54 +02:00
elevator.c block: don't merge requests of different failfast settings 2009-07-03 21:06:45 +02:00
genhd.c Driver Core: block: add nodename support for block drivers. 2009-06-15 21:30:25 -07:00
ioctl.c block: Use accessor functions for queue limits 2009-05-22 23:22:54 +02:00
Kconfig block: rename CONFIG_LBD to CONFIG_LBDAF 2009-06-19 08:08:50 +02:00
Kconfig.iosched update I/O sched Kconfig help texts - CFQ is now default, not AS. 2007-02-17 20:08:22 +01:00
Makefile block: get rid of queue-private command filter 2009-07-01 10:56:26 +02:00
noop-iosched.c block: get rid of elevator_t typedef 2008-12-29 08:29:50 +01:00
scsi_ioctl.c block: call blk_scsi_ioctl_init() 2009-07-10 20:31:53 +02:00