From: Michael Tokarev <mjt@tls.msk.ru>
To: Peter Wu <peter@lekensteyn.nl>, qemu-devel@nongnu.org
Cc: qemu-trivial@nongnu.org
Subject: Re: [Qemu-trivial] [PATCH] gdbstub: set listen backlog to 1
Date: Sun, 29 May 2016 10:55:57 +0300 [thread overview]
Message-ID: <574AA08D.2020005@msgid.tls.msk.ru> (raw)
In-Reply-To: <1462354337-1733-1-git-send-email-peter@lekensteyn.nl>
04.05.2016 12:32, Peter Wu wrote:
> Avoid possible connection drops on Linux (when tcp_syncookies is
> disabled) or fallbacks to SYN cookies with the following kernel warning:
>
> TCP: request_sock_TCP: Possible SYN flooding on port 1234. Sending cookies. Check SNMP counters.
>
> Since Linux 4.4 (ef547f2ac16b "tcp: remove max_qlen_log"), a backlog of
> zero is really treated as the "queue length for completely established
> sockets waiting to be accepted" (listen(2)). This is apparently a valid
> interpretation of an "implementation-defined minimum value" for a
> backlog value of 0 (listen(3p)). Previous kernels would use 8 as
> minimum value, but that is no longer the case.
Applied to -trivial, thanks!
/mjt
prev parent reply other threads:[~2016-05-29 7:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-04 9:32 [Qemu-trivial] [PATCH] gdbstub: set listen backlog to 1 Peter Wu
2016-05-29 7:55 ` Michael Tokarev [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=574AA08D.2020005@msgid.tls.msk.ru \
--to=mjt@tls.msk.ru \
--cc=peter@lekensteyn.nl \
--cc=qemu-devel@nongnu.org \
--cc=qemu-trivial@nongnu.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).