Date: Fri, 12 Dec 2008 01:51:58 +0300
From: Evgeniy Polyakov <zbr@ioremap.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: mike@nauticaltech.com, bugme-daemon@bugzilla.kernel.org,
       netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
       Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [Bugme-new] [Bug 12201] New: long wait in call_usermodehelper() / queue_work() / wait_for_completion()
Message-ID: <20081211225158.GA2169@ioremap.net>
References: <bug-12201-10286@http.bugzilla.kernel.org/> <20081211143758.510b51b6.akpm@linux-foundation.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20081211143758.510b51b6.akpm@linux-foundation.org>
User-Agent: Mutt/1.5.13 (2006-08-11)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1045
Lines: 31

Hi.

On Thu, Dec 11, 2008 at 02:37:58PM -0800, Andrew Morton (akpm@linux-foundation.org) wrote:
> > If I write a small pilot program that calls socket(PF_NETLINK, SOCK_RAW,
> > NETLINK_AUDIT), it will delay by 1-2 seconds 100% of the time (assuming server
> > has been online for a while).  Certain protocol types given to socket() have
> > zero delay (because no module needs to be loaded).
> > 
> > Steps to reproduce:
> > Once server has been online for a while, a simple call to socket(PF_NETLINK,
> > SOCK_RAW, NETLINK_AUDIT) shows the problem.
> 
> OK, weird.
> 
> Please get sysrq working then get us a task trace, so we can see who is
> sleeping where.  Do this:
> 
> 
> - run your "small pilot program"

Or send it to us and we will quickly fix the bug :)

Thank you!

-- 
	Evgeniy Polyakov
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/