kernel/block/blk.h, branch linux-5.1.y

block: pass page to xen_biovec_phys_mergeable

2019-05-31T13:43:44Z

[ Upstream commit 0383ad4374f7ad7edd925a2ee4753035c3f5508a ] xen_biovec_phys_mergeable() only needs .bv_page of the 2nd bio bvec for checking if the two bvecs can be merged, so pass page to xen_biovec_phys_mergeable() directly. No function change. Cc: ris Ostrovsky Cc: Juergen Gross Cc: xen-devel@lists.xenproject.org Cc: Omar Sandoval Cc: Christoph Hellwig Reviewed-by: Christoph Hellwig Reviewed-by: Boris Ostrovsky Signed-off-by: Ming Lei Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin

blk-mq: save queue mapping result into ctx directly

2019-02-01T15:33:04Z

Currently, the queue mapping result is saved in a two-dimensional array. In the hot path, to get a hctx, we need do following: q->queue_hw_ctx[q->tag_set->map[type].mq_map[cpu]] This isn't very efficient. We could save the queue mapping result into ctx directly with different hctx type, like, ctx->hctxs[type] Signed-off-by: Jianchao Wang Signed-off-by: Jens Axboe

block: sum requests in the plug structure

2018-11-26T17:35:22Z

This isn't exactly the same as the previous count, as it includes requests for all devices. But that really doesn't matter, if we have more than the threshold (16) queued up, flush it. It's not worth it to have an expensive list loop for this. Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: Remove bio->bi_ioc

2018-11-20T02:03:44Z

bio->bi_ioc is never set so always NULL. Remove references to it in bio_disassociate_task() and in rq_ioc() and delete this field from struct bio. With this change, rq_ioc() always returns current->io_context without the need for a bio argument. Further simplify the code and make it more readable by also removing this helper, which also allows to simplify blk_mq_sched_assign_ioc() by removing its bio argument. Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Reviewed-by: Adam Manzanares Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe

Merge tag 'v4.20-rc3' into for-4.21/block

2018-11-18T22:46:03Z

Merge in -rc3 to resolve a few conflicts, but also to get a few important fixes that have gone into mainline since the block 4.21 branch was forked off (most notably the SCSI queue issue, which is both a conflict AND needed fix). Signed-off-by: Jens Axboe

block: remove queue_lockdep_assert_held

2018-11-15T19:13:21Z

The only remaining user unconditionally drops and reacquires the lock, which means we really don't need any additional (conditional) annotation. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: use atomic bitops for ->queue_flags

2018-11-15T19:13:19Z

->queue_flags is generally not set or cleared in the fast path, and also generally set or cleared one flag at a time. Make use of the normal atomic bitops for it so that we don't need to take the queue_lock, which is otherwise mostly unused in the core block layer now. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove deadline __deadline manipulation helpers

2018-11-15T19:13:16Z

No users left since the removal of the legacy request interface, we can remove all the magic bit stealing now and make it a normal field. But use WRITE_ONCE/READ_ONCE on the new deadline field, given that we don't seem to have any mechanism to guarantee a new value actually gets seen by other threads. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove req->timeout_list

2018-11-09T18:44:10Z

Unused now that the legacy request path is gone. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: make sure discard bio is aligned with logical block size

2018-11-09T13:23:14Z

Obviously the created discard bio has to be aligned with logical block size. This patch introduces the helper of bio_allowed_max_sectors() for this purpose. Cc: stable@vger.kernel.org Cc: Mike Snitzer Cc: Christoph Hellwig Cc: Xiao Ni Cc: Mariusz Dabrowski Fixes: 744889b7cbb56a6 ("block: don't deal with discard limit in blkdev_issue_discard()") Fixes: a22c4d7e34402cc ("block: re-add discard_granularity and alignment checks") Reported-by: Rui Salvaterra Tested-by: Rui Salvaterra Signed-off-by: Ming Lei Signed-off-by: Jens Axboe