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Jens Axboe f2d1f0ae78 cfq-iosched: cache prio_tree root in cfqq->p_root ... Currently we look it up from ->ioprio, but ->ioprio can change if either the process gets its IO priority changed explicitly, or if cfq decides to temporarily boost it. So if we are unlucky, we can end up attempting to remove a node from a different rbtree root than where it was added. Fix this by using ->org_ioprio as the prio_tree index, since that will only change for explicit IO priority settings (not for a boost). Additionally cache the rbtree root inside the cfqq, then we don't have to add code to reinsert the cfqq in the prio_tree if IO priority changes. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		16 years ago
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Kconfig	…
Kconfig.iosched	…
Makefile	…
as-iosched.c	…
blk-barrier.c	…
blk-core.c	block: simplify I/O stat accounting	16 years ago
blk-exec.c	…
blk-integrity.c	…
blk-ioc.c	…
blk-map.c	…
blk-merge.c	block: simplify I/O stat accounting	16 years ago
blk-settings.c	…
blk-softirq.c	…
blk-sysfs.c	block: simplify I/O stat accounting	16 years ago
blk-tag.c	…
blk-timeout.c	block: fix intermittent dm timeout based oops	16 years ago
blk.h	block: simplify I/O stat accounting	16 years ago
bsg.c	…
cfq-iosched.c	cfq-iosched: cache prio_tree root in cfqq->p_root	16 years ago
cmd-filter.c	…
compat_ioctl.c	…
deadline-iosched.c	…
elevator.c	…
genhd.c	…
ioctl.c	…
noop-iosched.c	…
scsi_ioctl.c	…