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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-11 08:41:17 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-11 08:41:17 -0700 |
commit | 23d4ed53b7342bf5999b3ea227d9f69e75e5a625 (patch) | |
tree | 86229fb558235c2f742b35c0c66d5d98003f5f6e /block/blk-core.c | |
parent | e413a19a8ef49ae3b76310bb569dabe66b22f5a3 (diff) | |
parent | a2d445d440003f2d70ee4cd4970ea82ace616fee (diff) |
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe:
"Final small batch of fixes to be included before -rc1. Some general
cleanups in here as well, but some of the blk-mq fixes we need for the
NVMe conversion and/or scsi-mq. The pull request contains:
- Support for not merging across a specified "chunk size", if set by
the driver. Some NVMe devices perform poorly for IO that crosses
such a chunk, so we need to support it generically as part of
request merging avoid having to do complicated split logic. From
me.
- Bump max tag depth to 10Ki tags. Some scsi devices have a huge
shared tag space. Before we failed with EINVAL if a too large tag
depth was specified, now we truncate it and pass back the actual
value. From me.
- Various blk-mq rq init fixes from me and others.
- A fix for enter on a dying queue for blk-mq from Keith. This is
needed to prevent oopsing on hot device removal.
- Fixup for blk-mq timer addition from Ming Lei.
- Small round of performance fixes for mtip32xx from Sam Bradshaw.
- Minor stack leak fix from Rickard Strandqvist.
- Two __init annotations from Fabian Frederick"
* 'for-linus' of git://git.kernel.dk/linux-block:
block: add __init to blkcg_policy_register
block: add __init to elv_register
block: ensure that bio_add_page() always accepts a page for an empty bio
blk-mq: add timer in blk_mq_start_request
blk-mq: always initialize request->start_time
block: blk-exec.c: Cleaning up local variable address returnd
mtip32xx: minor performance enhancements
blk-mq: ->timeout should be cleared in blk_mq_rq_ctx_init()
blk-mq: don't allow queue entering for a dying queue
blk-mq: bump max tag depth to 10K tags
block: add blk_rq_set_block_pc()
block: add notion of a chunk size for request merging
Diffstat (limited to 'block/blk-core.c')
-rw-r--r-- | block/blk-core.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 40d654861c33..9aca8c71e70b 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1218,6 +1218,8 @@ struct request *blk_make_request(struct request_queue *q, struct bio *bio, if (unlikely(!rq)) return ERR_PTR(-ENOMEM); + blk_rq_set_block_pc(rq); + for_each_bio(bio) { struct bio *bounce_bio = bio; int ret; @@ -1235,6 +1237,22 @@ struct request *blk_make_request(struct request_queue *q, struct bio *bio, EXPORT_SYMBOL(blk_make_request); /** + * blk_rq_set_block_pc - initialize a requeest to type BLOCK_PC + * @rq: request to be initialized + * + */ +void blk_rq_set_block_pc(struct request *rq) +{ + rq->cmd_type = REQ_TYPE_BLOCK_PC; + rq->__data_len = 0; + rq->__sector = (sector_t) -1; + rq->bio = rq->biotail = NULL; + memset(rq->__cmd, 0, sizeof(rq->__cmd)); + rq->cmd = rq->__cmd; +} +EXPORT_SYMBOL(blk_rq_set_block_pc); + +/** * blk_requeue_request - put a request back on queue * @q: request queue where request should be inserted * @rq: request to be inserted |