From: Mike Christie <[email protected]> This patch converts the block layer merging code to use separate variables for the operation and flags, and to check request->op for the REQ_OP.
Signed-off-by: Mike Christie <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> --- block/blk-core.c | 2 +- block/blk-merge.c | 10 ++++++---- include/linux/blkdev.h | 20 ++++++++++---------- 3 files changed, 17 insertions(+), 15 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 3ec1310..5632cd1 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2175,7 +2175,7 @@ EXPORT_SYMBOL(submit_bio); static int blk_cloned_rq_check_limits(struct request_queue *q, struct request *rq) { - if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->cmd_flags)) { + if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->op)) { printk(KERN_ERR "%s: over max size limit.\n", __func__); return -EIO; } diff --git a/block/blk-merge.c b/block/blk-merge.c index 2613531..c02371f 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -649,7 +649,8 @@ static int attempt_merge(struct request_queue *q, struct request *req, if (!rq_mergeable(req) || !rq_mergeable(next)) return 0; - if (!blk_check_merge_flags(req->cmd_flags, next->cmd_flags)) + if (!blk_check_merge_flags(req->cmd_flags, req->op, next->cmd_flags, + next->op)) return 0; /* @@ -663,7 +664,7 @@ static int attempt_merge(struct request_queue *q, struct request *req, || req_no_special_merge(next)) return 0; - if (req->cmd_flags & REQ_WRITE_SAME && + if (req->op == REQ_OP_WRITE_SAME && !blk_write_same_mergeable(req->bio, next->bio)) return 0; @@ -751,7 +752,8 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) if (!rq_mergeable(rq) || !bio_mergeable(bio)) return false; - if (!blk_check_merge_flags(rq->cmd_flags, bio->bi_rw)) + if (!blk_check_merge_flags(rq->cmd_flags, rq->op, bio->bi_rw, + bio->bi_op)) return false; /* different data direction or already started, don't merge */ @@ -767,7 +769,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio) return false; /* must be using the same buffer */ - if (rq->cmd_flags & REQ_WRITE_SAME && + if (rq->op == REQ_OP_WRITE_SAME && !blk_write_same_mergeable(rq->bio, bio)) return false; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index e2b2881..39df8ef 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -660,16 +660,16 @@ static inline bool rq_mergeable(struct request *rq) return true; } -static inline bool blk_check_merge_flags(unsigned int flags1, - unsigned int flags2) +static inline bool blk_check_merge_flags(unsigned int flags1, unsigned int op1, + unsigned int flags2, unsigned int op2) { - if ((flags1 & REQ_DISCARD) != (flags2 & REQ_DISCARD)) + if ((op1 == REQ_OP_DISCARD) != (op2 == REQ_OP_DISCARD)) return false; if ((flags1 & REQ_SECURE) != (flags2 & REQ_SECURE)) return false; - if ((flags1 & REQ_WRITE_SAME) != (flags2 & REQ_WRITE_SAME)) + if ((op1 == REQ_OP_WRITE_SAME) != (op2 == REQ_OP_WRITE_SAME)) return false; return true; @@ -870,12 +870,12 @@ static inline unsigned int blk_rq_cur_sectors(const struct request *rq) } static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q, - unsigned int cmd_flags) + int op) { - if (unlikely(cmd_flags & REQ_DISCARD)) + if (unlikely(op == REQ_OP_DISCARD)) return min(q->limits.max_discard_sectors, UINT_MAX >> 9); - if (unlikely(cmd_flags & REQ_WRITE_SAME)) + if (unlikely(op == REQ_OP_WRITE_SAME)) return q->limits.max_write_same_sectors; return q->limits.max_sectors; @@ -902,11 +902,11 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq) if (unlikely(rq->cmd_type != REQ_TYPE_FS)) return q->limits.max_hw_sectors; - if (!q->limits.chunk_sectors || (rq->cmd_flags & REQ_DISCARD)) - return blk_queue_get_max_sectors(q, rq->cmd_flags); + if (!q->limits.chunk_sectors || (rq->op == REQ_OP_DISCARD)) + return blk_queue_get_max_sectors(q, rq->op); return min(blk_max_size_offset(q, blk_rq_pos(rq)), - blk_queue_get_max_sectors(q, rq->cmd_flags)); + blk_queue_get_max_sectors(q, rq->op)); } static inline unsigned int blk_rq_count_bios(struct request *rq) -- 2.7.2 ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
