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This patch is used to update the documents of D-release.
[kvmfornfv.git]
/
kernel
/
block
/
blk-flush.c
diff --git
a/kernel/block/blk-flush.c
b/kernel/block/blk-flush.c
index
20badd7
..
9c423e5
100644
(file)
--- a/
kernel/block/blk-flush.c
+++ b/
kernel/block/blk-flush.c
@@
-73,6
+73,7
@@
#include "blk.h"
#include "blk-mq.h"
#include "blk.h"
#include "blk-mq.h"
+#include "blk-mq-tag.h"
/* FLUSH/FUA sequences */
enum {
/* FLUSH/FUA sequences */
enum {
@@
-226,7
+227,12
@@
static void flush_end_io(struct request *flush_rq, int error)
struct blk_flush_queue *fq = blk_get_flush_queue(q, flush_rq->mq_ctx);
if (q->mq_ops) {
struct blk_flush_queue *fq = blk_get_flush_queue(q, flush_rq->mq_ctx);
if (q->mq_ops) {
+ struct blk_mq_hw_ctx *hctx;
+
+ /* release the tag's ownership to the req cloned from */
spin_lock_irqsave(&fq->mq_flush_lock, flags);
spin_lock_irqsave(&fq->mq_flush_lock, flags);
+ hctx = q->mq_ops->map_queue(q, flush_rq->mq_ctx->cpu);
+ blk_mq_tag_set_rq(hctx, flush_rq->tag, fq->orig_rq);
flush_rq->tag = -1;
}
flush_rq->tag = -1;
}
@@
-308,11
+314,18
@@
static bool blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq)
/*
* Borrow tag from the first request since they can't
/*
* Borrow tag from the first request since they can't
- * be in flight at the same time.
+ * be in flight at the same time. And acquire the tag's
+ * ownership for flush req.
*/
if (q->mq_ops) {
*/
if (q->mq_ops) {
+ struct blk_mq_hw_ctx *hctx;
+
flush_rq->mq_ctx = first_rq->mq_ctx;
flush_rq->tag = first_rq->tag;
flush_rq->mq_ctx = first_rq->mq_ctx;
flush_rq->tag = first_rq->tag;
+ fq->orig_rq = first_rq;
+
+ hctx = q->mq_ops->map_queue(q, first_rq->mq_ctx->cpu);
+ blk_mq_tag_set_rq(hctx, first_rq->tag, flush_rq);
}
flush_rq->cmd_type = REQ_TYPE_FS;
}
flush_rq->cmd_type = REQ_TYPE_FS;