From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net-next-2.6] tcp: Add SNMP counter for DEFER_ACCEPT
Date: Sun, 21 Mar 2010 18:32:32 -0700 (PDT) [thread overview]
Message-ID: <20100321.183232.123981427.davem@davemloft.net> (raw)
In-Reply-To: <1269013038.3048.58.camel@edumazet-laptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 19 Mar 2010 16:37:18 +0100
> Its currently hard to diagnose when ACK frames are dropped because an
> application set TCP_DEFER_ACCEPT on its listening socket.
>
> See http://bugzilla.kernel.org/show_bug.cgi?id=15507
>
> This patch adds a SNMP value, named TCPDeferAcceptDrop
>
> netstat -s | grep TCPDeferAcceptDrop
> TCPDeferAcceptDrop: 0
>
> This counter is incremented every time we drop a pure ACK frame received
> by a socket in SYN_RECV state because its SYNACK retrans count is lower
> than defer_accept value.
>
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Applied, thanks Eric.
prev parent reply other threads:[~2010-03-22 1:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-19 15:37 [PATCH net-next-2.6] tcp: Add SNMP counter for DEFER_ACCEPT Eric Dumazet
2010-03-22 1:32 ` David Miller [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100321.183232.123981427.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=eric.dumazet@gmail.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).