From: Andrew Morton <akpm@linux-foundation.org>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: Ingo Molnar <mingo@elte.hu>, Jan Beulich <jbeulich@novell.com>,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
linux-kernel@vger.kernel.org, Gautham R Shenoy <ego@in.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Alexey Dobriyan <adobriyan@gmail.com>, <netdev@vger.kernel.org>
Subject: Re: [PATCH 2/2] sysctl: lockdep support for sysctl reference counting.
Date: Fri, 10 Apr 2009 02:18:54 -0700 [thread overview]
Message-ID: <20090410021854.65c6662a.akpm@linux-foundation.org> (raw)
In-Reply-To: <m1ab7fxqxw.fsf_-_@fess.ebiederm.org>
On Sat, 21 Mar 2009 00:42:19 -0700 ebiederm@xmission.com (Eric W. Biederman) wrote:
> It is possible for get lock ordering deadlocks between locks
> and waiting for the sysctl used count to drop to zero. We have
> recently observed one of these in the networking code.
>
> So teach the sysctl code how to speak lockdep so the kernel
> can warn about these kinds of rare issues proactively.
`make headers_check':
/usr/src/25/usr/include/linux/sysctl.h:31: included file 'linux/lockdep.h' is not exported
make[2]: *** [/usr/src/25/usr/include/linux/.check] Error 1
It looks like we'll need version 2 on these patches..
prev parent reply other threads:[~2009-04-10 9:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <49B91A7E.76E4.0078.0@novell.com>
[not found] ` <tip-6a09dfa870ba0ed21b1124539968a36b42660661@git.kernel.org>
[not found] ` <1236934491.5188.209.camel@laptop>
[not found] ` <49BA33BE.76E4.0078.0@novell.com>
[not found] ` <1236937423.22914.3698.camel@twins>
[not found] ` <20090313103828.GB31094@elte.hu>
[not found] ` <m1d4cd9n4k.fsf@fess.ebiederm.org>
[not found] ` <20090320085205.GB16021@elte.hu>
[not found] ` <m14oxo8qis.fsf@fess.ebiederm.org>
[not found] ` <20090320182404.GA31629@elte.hu>
[not found] ` <1237575134.4667.5.camel@laptop>
[not found] ` <1237577688.4667.68.camel@laptop>
2009-03-21 7:39 ` [PATCH 0/2] sysctl: lockdep support Eric W. Biederman
2009-03-21 7:40 ` [PATCH 1/2] sysctl: Don't take the use count of multiple heads at a time Eric W. Biederman
2009-03-21 7:42 ` [PATCH 2/2] sysctl: lockdep support for sysctl reference counting Eric W. Biederman
2009-03-30 22:26 ` Andrew Morton
2009-03-30 22:53 ` Eric W. Biederman
2009-03-30 23:18 ` Andrew Morton
2009-03-30 23:50 ` Eric W. Biederman
2009-03-31 8:10 ` Peter Zijlstra
2009-03-31 8:47 ` Eric W. Biederman
2009-03-31 8:17 ` Peter Zijlstra
2009-03-31 13:40 ` Eric W. Biederman
2009-03-31 15:35 ` Peter Zijlstra
2009-03-31 22:44 ` Eric W. Biederman
2009-04-10 9:18 ` Andrew Morton [this message]
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