linux-kernel - Re: [2.6.27-rc5] inotify_read's ev_mutex vs do_page_fault's mmap

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Message-ID: <6278d2220809101310l1c6e4810q2d5c56ca693a2d43@mail.gmail.com>
Date:	Wed, 10 Sep 2008 21:10:42 +0100
From:	"Daniel J Blueman" <daniel.blueman@...il.com>
To:	"Nick Piggin" <nickpiggin@...oo.com.au>
Cc:	torvalds@...ux-foundation.org,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Linux Kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [2.6.27-rc5] inotify_read's ev_mutex vs do_page_fault's mmap_sem...

On Wed, Sep 10, 2008 at 9:12 PM, Nick Piggin <nickpiggin@...oo.com.au> wrote:
> On Wednesday 10 September 2008 14:07, Nick Piggin wrote:
>> On Wednesday 10 September 2008 07:03, Daniel J Blueman wrote:
>> > I observed this locking violation [1] while gnome-panel was loading;
>> > this was previously reported at
>> > http://uwsg.iu.edu/hypermail/linux/kernel/0806.3/2881.html .
>> >
>> > Let me know for more information/config/testing. Thanks!
>>
>> Thanks for the report. I've attached a patch you could test. It compiles
>> (and boots a UML here) but I don't think I've actually tested the inotify
>> path at all, so it may explode on you.
>
> Indeed it was wrong, I messed up the waitqueue handling. This one
> survives longer for me...

So far, so good with that last patch. I'll continue testing this and
follow up if I find any problem.

Thanks for the patching, Nick!

Daniel
-- 
Daniel J Blueman
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