From: Stefan Hajnoczi <stefanha@redhat.com>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Nick Thomas <nick@bytemark.co.uk>
Subject: [Qemu-devel] [PATCH 0/3] nbd: use TCP_NODELAY
Date: Mon, 15 Apr 2013 16:14:45 +0200 [thread overview]
Message-ID: <1366035288-15840-1-git-send-email-stefanha@redhat.com> (raw)
The nbd block driver should use TCP_NODELAY. Nick Thomas <nick@bytemark.co.uk>
measured a 40 millisecond latency added by the Naggle algorithm.
This series turns on TCP_NODELAY. This requires that we use TCP_CORK to
efficiently send NBD requests that contain a payload after the header.
Finally, fix a bug where we forget to unlock a mutex when sending fails.
Stefan Hajnoczi (3):
nbd: unlock mutex in nbd_co_send_request() error path
nbd: use TCP_CORK in nbd_co_send_request()
nbd: set TCP_NODELAY
block/nbd.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
--
1.8.1.4
next reply other threads:[~2013-04-15 14:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-15 14:14 Stefan Hajnoczi [this message]
2013-04-15 14:14 ` [Qemu-devel] [PATCH 1/3] nbd: unlock mutex in nbd_co_send_request() error path Stefan Hajnoczi
2013-04-15 14:14 ` [Qemu-devel] [PATCH 2/3] nbd: use TCP_CORK in nbd_co_send_request() Stefan Hajnoczi
2013-04-15 14:14 ` [Qemu-devel] [PATCH 3/3] nbd: set TCP_NODELAY Stefan Hajnoczi
2013-04-15 14:28 ` [Qemu-devel] [PATCH 0/3] nbd: use TCP_NODELAY Nicholas Thomas
2013-04-15 14:33 ` Paolo Bonzini
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