kernel/linux.git/block/blk-flush.c, branch v5.3.1

block: switch all files cleared marked as GPLv2 to SPDX tags

2019-04-30T22:11:57+00:00

All these files have some form of the usual GPLv2 boilerplate. Switch them to use SPDX tags instead. Reviewed-by: Chaitanya Kulkarni Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

blk-mq: use blk_mq_put_driver_tag() to put tag

2019-03-24T16:26:16+00:00

Expect arguments, blk_mq_put_driver_tag_hctx() and blk_mq_put_driver_tag() is same. We can just use argument 'request' to put tag by blk_mq_put_driver_tag(). Then we can remove the unused blk_mq_put_driver_tag_hctx(). Signed-off-by: Yufen Yu Signed-off-by: Jens Axboe

blk-mq: fix a hung issue when fsync

2019-01-30T15:53:54+00:00

Florian reported a io hung issue when fsync(). It should be triggered by following race condition. data + post flush a flush blk_flush_complete_seq case REQ_FSEQ_DATA blk_flush_queue_rq issued to driver blk_mq_dispatch_rq_list try to issue a flush req failed due to NON-NCQ command .queue_rq return BLK_STS_DEV_RESOURCE request completion req->end_io // doesn't check RESTART mq_flush_data_end_io case REQ_FSEQ_POSTFLUSH blk_kick_flush do nothing because previous flush has not been completed blk_mq_run_hw_queue insert rq to hctx->dispatch due to RESTART is still set, do nothing To fix this, replace the blk_mq_run_hw_queue in mq_flush_data_end_io with blk_mq_sched_restart to check and clear the RESTART flag. Fixes: bd166ef1 (blk-mq-sched: add framework for MQ capable IO schedulers) Reported-by: Florian Stecker Tested-by: Florian Stecker Signed-off-by: Jianchao Wang Signed-off-by: Jens Axboe

block: add queue_is_mq() helper

2018-11-16T15:34:06+00:00

Various spots check for q->mq_ops being non-NULL, but provide a helper to do this instead. Where the ->mq_ops != NULL check is redundant, remove it. Since mq == rq-based now that legacy is gone, get rid of the queue_is_rq_based() and just use queue_is_mq() everywhere. Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: update a few comments for the legacy request removal

2018-11-15T19:13:23+00:00

Only the mq locking is left in the flush state machine. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

blk-mq: cache request hardware queue mapping

2018-11-07T20:44:59+00:00

We call blk_mq_map_queue() a lot, at least two times for each request per IO, sometimes more. Since we now have an indirect call as well in that function. cache the mapping so we don't have to re-call blk_mq_map_queue() for the same request multiple times. Reviewed-by: Keith Busch Reviewed-by: Sagi Grimberg Reviewed-by: Hannes Reinecke Signed-off-by: Jens Axboe

blk-mq: pass in request/bio flags to queue mapping

2018-11-07T20:44:59+00:00

Prep patch for being able to place request based not just on CPU location, but also on the type of request. Reviewed-by: Hannes Reinecke Reviewed-by: Keith Busch Signed-off-by: Jens Axboe

block: cleanup kick/queued handling

2018-11-07T20:42:32+00:00

Now that blk_flush_queue_rq() always returns false, we can remove that return value. That bubbles through the stack, allowing us to remove a bunch of state tracking around it. Tested-by: Ming Lei Reviewed-by: Omar Sandoval Signed-off-by: Jens Axboe

block: remove non mq parts from the flush code

2018-11-07T20:42:32+00:00

Reviewed-by: Hannes Reinecke Tested-by: Ming Lei Reviewed-by: Omar Sandoval Signed-off-by: Jens Axboe

blk-mq: change gfp flags to GFP_NOIO in blk_mq_realloc_hw_ctxs

2018-10-13T21:42:01+00:00

blk_mq_realloc_hw_ctxs could be invoked during update hw queues. At the momemt, IO is blocked. Change the gfp flags from GFP_KERNEL to GFP_NOIO to avoid forever hang during memory allocation in blk_mq_realloc_hw_ctxs. Signed-off-by: Jianchao Wang Signed-off-by: Jens Axboe