blk-merge.c (d57c1cf43e7b33fdd790d50d972e0e5d6a0d20fe) blk-merge.c (5b2050718d095cd3242d1f42aaaea3a2fec8e6f0)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Functions related to segment and merge handling
4 */
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/bio.h>
8#include <linux/blkdev.h>

--- 768 unchanged lines hidden (view full) ---

777
778 if (rq_data_dir(req) != rq_data_dir(next))
779 return NULL;
780
781 if (req_op(req) == REQ_OP_WRITE_SAME &&
782 !blk_write_same_mergeable(req->bio, next->bio))
783 return NULL;
784
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Functions related to segment and merge handling
4 */
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/bio.h>
8#include <linux/blkdev.h>

--- 768 unchanged lines hidden (view full) ---

777
778 if (rq_data_dir(req) != rq_data_dir(next))
779 return NULL;
780
781 if (req_op(req) == REQ_OP_WRITE_SAME &&
782 !blk_write_same_mergeable(req->bio, next->bio))
783 return NULL;
784
785 /*
786 * Don't allow merge of different write hints, or for a hint with
787 * non-hint IO.
788 */
789 if (req->write_hint != next->write_hint)
790 return NULL;
791
785 if (req->ioprio != next->ioprio)
786 return NULL;
787
788 /*
789 * If we are allowed to merge, then append bio list
790 * from next to rq and release next. merge_requests_fn
791 * will have updated segment counts, update sector
792 * counts here. Handle DISCARDs separately, as they

--- 110 unchanged lines hidden (view full) ---

903 if (!bio_crypt_rq_ctx_compatible(rq, bio))
904 return false;
905
906 /* must be using the same buffer */
907 if (req_op(rq) == REQ_OP_WRITE_SAME &&
908 !blk_write_same_mergeable(rq->bio, bio))
909 return false;
910
792 if (req->ioprio != next->ioprio)
793 return NULL;
794
795 /*
796 * If we are allowed to merge, then append bio list
797 * from next to rq and release next. merge_requests_fn
798 * will have updated segment counts, update sector
799 * counts here. Handle DISCARDs separately, as they

--- 110 unchanged lines hidden (view full) ---

910 if (!bio_crypt_rq_ctx_compatible(rq, bio))
911 return false;
912
913 /* must be using the same buffer */
914 if (req_op(rq) == REQ_OP_WRITE_SAME &&
915 !blk_write_same_mergeable(rq->bio, bio))
916 return false;
917
918 /*
919 * Don't allow merge of different write hints, or for a hint with
920 * non-hint IO.
921 */
922 if (rq->write_hint != bio->bi_write_hint)
923 return false;
924
911 if (rq->ioprio != bio_prio(bio))
912 return false;
913
914 return true;
915}
916
917enum elv_merge blk_try_merge(struct request *rq, struct bio *bio)
918{

--- 149 unchanged lines hidden (view full) ---

1068{
1069 struct blk_plug *plug;
1070 struct request *rq;
1071
1072 plug = blk_mq_plug(q, bio);
1073 if (!plug || rq_list_empty(plug->mq_list))
1074 return false;
1075
925 if (rq->ioprio != bio_prio(bio))
926 return false;
927
928 return true;
929}
930
931enum elv_merge blk_try_merge(struct request *rq, struct bio *bio)
932{

--- 149 unchanged lines hidden (view full) ---

1082{
1083 struct blk_plug *plug;
1084 struct request *rq;
1085
1086 plug = blk_mq_plug(q, bio);
1087 if (!plug || rq_list_empty(plug->mq_list))
1088 return false;
1089
1076 /* check the previously added entry for a quick merge attempt */
1077 rq = rq_list_peek(&plug->mq_list);
1078 if (rq->q == q) {
1079 if (blk_attempt_bio_merge(q, rq, bio, nr_segs, false) ==
1080 BIO_MERGE_OK)
1081 return true;
1090 rq_list_for_each(&plug->mq_list, rq) {
1091 if (rq->q == q) {
1092 if (blk_attempt_bio_merge(q, rq, bio, nr_segs, false) ==
1093 BIO_MERGE_OK)
1094 return true;
1095 break;
1096 }
1097
1098 /*
1099 * Only keep iterating plug list for merges if we have multiple
1100 * queues
1101 */
1102 if (!plug->multiple_queues)
1103 break;
1082 }
1083 return false;
1084}
1085
1086/*
1087 * Iterate list of requests and see if we can merge this bio with any
1088 * of them.
1089 */

--- 56 unchanged lines hidden --- 		1104 }
1105 return false;
1106}
1107
1108/*
1109 * Iterate list of requests and see if we can merge this bio with any
1110 * of them.
1111 */

--- 56 unchanged lines hidden ---