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linux/block/blk-lib.c
Jens Axboe c8123f8c9c block: add cond_resched() to potentially long running ioctl discard loop 
When mkfs issues a full device discard and the device only
supports discards of a smallish size, we can loop in
blkdev_issue_discard() for a long time. If preempt isn't enabled,
this can turn into a softlock situation and the kernel will
start complaining.

Add an explicit cond_resched() at the end of the loop to avoid
that.

Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-02-12 09:36:37 -07:00

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