block: make blk-throttle preserve the issuing task on delayed bios

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Make blk-throttle call bio_associate_current() on bios being delayed
such that they get issued to block layer with the original io_context.
This allows stacking blk-throttle and cfq-iosched propio policies.
bios will always be issued with the correct ioc and blkcg whether it
gets delayed by blk-throttle or not.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Tejun Heo 2012-03-05 13:15:29 -08:00 • committed by Jens Axboe

parent 4f85cb96d9

commit 671058fb2a

1 changed files with 4 additions and 0 deletions

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block/blk-throttle.c

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