linux-kernel - Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 31 May 2008 15:58:56 +0300 (EEST)
From:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Evgeniy Polyakov <johnpol@....mipt.ru>
Subject: Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

On Sat, 31 May 2008, Ingo Molnar wrote:

> 
> * Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> wrote:
> 
> > > Btw, does your distcc perhaps happen enable TCP_DEFER_ACCEPT (there 
> > > were some post 2.6.25 changes into it)?
> > 
> > Hmm, if so, please try this revert below (I hope I got everything that 
> > is related there, gitk is currently broken for me so that viewing many 
> > commits quickly is a pain, so I might have accidently missed 
> > something)...
> 
> what is the easiest way to figure out whether my version of distcc 
> enables TCP_DEFER_ACCEPT?

strace distccd (the listening party is the interesting one here, not the 
distcc)?

...setsockopt(listenfd, SOL_TCP, TCP_DEFER_ACCEPT, &val, sizeof(val)) 
seems to be the magic trick that is interestion here.

-- 
 i.