kernel/linux.git/block/blk-flush.c, branch v3.16.4

block: remove elv_abort_queue and blk_abort_flushes

2014-06-11T21:31:21+00:00

elv_abort_queue has no callers, and blk_abort_flushes is only called by elv_abort_queue. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: mq flush: clear flush_rq's tag in flush_end_io()

2014-06-04T16:40:16+00:00

blk_mq_tag_to_rq() needs to be able to tell if it should return the original request, or the flush request if we are doing a flush sequence. Clear the flush tag when IO completes for a flush, since that is what we are comparing against. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

blk-mq: blk_mq_tag_to_rq should handle flush request

2014-05-30T14:06:42+00:00

flush request is special, which borrows the tag from the parent request. Hence blk_mq_tag_to_rq needs special handling to return the flush request from the tag. Signed-off-by: Shaohua Li Signed-off-by: Jens Axboe

blk-mq: add helper to insert requests from irq context

2014-05-28T14:08:02+00:00

Both the cache flush state machine and the SCSI midlayer want to submit requests from irq context, and the current per-request requeue_work unfortunately causes corruption due to sharing with the csd field for flushes. Replace them with a per-request_queue list of requests to be requeued. Based on an earlier test by Ming Lei. Signed-off-by: Christoph Hellwig Reported-by: Ming Lei Tested-by: Ming Lei Signed-off-by: Jens Axboe

blk-mq: rename mq_flush_work struct request member

2014-04-16T20:15:25+00:00

We will use this work_struct to requeue scsi commands from the completion handler as well, so give it a more generic name. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

blk-mq: make ->flush_rq fully transparent to drivers

2014-04-15T20:03:02+00:00

Drivers shouldn't have to care about the block layer setting aside a request to implement the flush state machine. We already override the mq context and tag to make it more transparent, but so far haven't deal with the driver private data in the request. Make sure to override this as well, and while we're at it add a proper helper sitting in blk-mq.c that implements the full impersonation. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

blk-mq: do not initialize req->special

2014-04-15T20:03:02+00:00

Drivers can reach their private data easily using the blk_mq_rq_to_pdu helper and don't need req->special. By not initializing it code can be simplified nicely, and we also shave off a few more instructions from the I/O path. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove 'q' parameter from kblockd_schedule_*_work()

2014-04-09T16:17:00+00:00

The queue parameter is never used, just get rid of it. Signed-off-by: Jens Axboe

block: change flush sequence list addition back to front add

2014-03-09T03:31:31+00:00

Commit 18741986 inadvertently changed the rq flush insertion from a head to a tail insertion. Fix that back up. Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe

blk-mq: merge blk_mq_insert_request and blk_mq_run_request

2014-02-21T16:58:48+00:00

It's almost identical to blk_mq_insert_request, so fold the two into one slightly more generic function by making the flush special case a bit smarted. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe