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Merge branch 'for-linus' of git://git.kernel.dk/linux-block

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Pull block fixes from Jens Axboe:
 "Just two small fixes for this -rc.

  One is just killing an unused variable from Keith, but the other
  fixes a performance regression for nbd in this series, where we
  inadvertently flipped when we set MSG_MORE when outputting data"

* 'for-linus' of git://git.kernel.dk/linux-block:
  nbd: only set MSG_MORE when we have more to send
  blk-mq: Remove unused variable
This commit is contained in:
Linus Torvalds 2017-01-20 12:28:02 -08:00
commit e3737b9145
2 changed files with 2 additions and 5 deletions
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1
block/blk-mq.c
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@ -912,7 +912,6 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
static void blk_mq_process_rq_list(struct blk_mq_hw_ctx *hctx)
{
LIST_HEAD(rq_list);
LIST_HEAD(driver_list);
if (unlikely(blk_mq_hctx_stopped(hctx)))
return;

6
drivers/block/nbd.c
View File

@ -271,7 +271,7 @@ static inline int sock_send_bvec(struct nbd_device *nbd, int index,
static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
{
struct request *req = blk_mq_rq_from_pdu(cmd);
int result, flags;
int result;
struct nbd_request request;
unsigned long size = blk_rq_bytes(req);
struct bio *bio;
@ -310,7 +310,6 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
if (type != NBD_CMD_WRITE)
return 0;
flags = 0;
bio = req->bio;
while (bio) {
struct bio *next = bio->bi_next;
@ -319,9 +318,8 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
bio_for_each_segment(bvec, bio, iter) {
bool is_last = !next && bio_iter_last(bvec, iter);
int flags = is_last ? 0 : MSG_MORE;
if (is_last)
flags = MSG_MORE;
dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
cmd, bvec.bv_len);
result = sock_send_bvec(nbd, index, &bvec, flags);