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authorChristoph Hellwig <hch@lst.de>2015-10-30 20:57:30 +0800
committerJens Axboe <axboe@fb.com>2015-12-22 09:38:16 -0700
commit287922eb0b186e2a5bf54fdd04b734c25c90035c (patch)
treebf7e8976139ac3eacfaab6ace9d1807088463140 /include/linux/blkdev.h
parent8c0b39155048d5a24f25c6c60aa83729927b04cd (diff)
block: defer timeouts to a workqueue
Timer context is not very useful for drivers to perform any meaningful abort action from. So instead of calling the driver from this useless context defer it to a workqueue as soon as possible. Note that while a delayed_work item would seem the right thing here I didn't dare to use it due to the magic in blk_add_timer that pokes deep into timer internals. But maybe this encourages Tejun to add a sensible API for that to the workqueue API and we'll all be fine in the end :) Contains a major update from Keith Bush: "This patch removes synchronizing the timeout work so that the timer can start a freeze on its own queue. The timer enters the queue, so timer context can only start a freeze, but not wait for frozen." Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e711f294934c..221dc3bac49f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -407,6 +407,7 @@ struct request_queue {
unsigned int rq_timeout;
struct timer_list timeout;
+ struct work_struct timeout_work;
struct list_head timeout_list;
struct list_head icq_list;