From: Eric Dumazet <eric.dumazet@gmail.com>
To: Alexey Vlasov <renton@renton.name>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.36.2 - loop on read /proc/net/tcp
Date: Wed, 22 Dec 2010 17:54:09 +0100 [thread overview]
Message-ID: <1293036849.3027.277.camel@edumazet-laptop> (raw)
In-Reply-To: <20101222134343.GC19998@beaver.vrungel.ru>
Le mercredi 22 décembre 2010 à 16:43 +0300, Alexey Vlasov a écrit :
> Hi.
>
> Has anyone seen such a bug at 2.6.36.2?
> # netstat -ntl
> Active Internet connections (only servers)
> Proto Recv-Q Send-Q Local Address Foreign Address State
> tcp 0 0 81.176.228.2:60608 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:8099 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:8099 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.7:8099 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:8100 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:8100 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:8101 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:8101 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:20037 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:8102 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:8102 0.0.0.0:* LISTEN
> tcp 0 0 127.0.0.1:3399 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:20040 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:38985 0.0.0.0:* LISTEN
> tcp 0 0 0.0.0.0:873 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:20041 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:20042 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:3306 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.3:3306 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.2:3306 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:9099 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:9099 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:20043 0.0.0.0:* LISTEN
> tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:9100 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:9100 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:20044 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.5:33549 0.0.0.0:* LISTEN
> ...
> First 30 lines are ok
>
> but then go lines repeating in "eternal" loop:
> tcp 0 0 81.176.228.2:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.3:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.7:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.2:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.3:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.7:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.2:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.3:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.4:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.7:80 0.0.0.0:* LISTEN
> tcp 0 0 81.176.228.2:80 0.0.0.0:* LISTEN
>
> # cat /proc/net/tcp
> ...
> It can hang an hour or so. but not always actually.
Ouch...
Hmm, yes, I think I can do something about it, thanks for the report
next prev parent reply other threads:[~2010-12-22 16:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-22 13:43 Alexey Vlasov
2010-12-22 16:54 ` Eric Dumazet [this message]
2010-12-23 5:07 ` Eric Dumazet
2010-12-23 17:33 ` David Miller
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=1293036849.3027.277.camel@edumazet-laptop \
--to=eric.dumazet@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=renton@renton.name \
/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
all inboxes | Powered by JetHome®