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From: Mark Hounschell <markh@compro.net>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: mlockall and mmap of IO devices don't mix
Date: Sat, 22 May 2004 06:47:32 -0400	[thread overview]
Message-ID: <40AF2FC4.911DB14B@compro.net> (raw)
In-Reply-To: 20040521191326.58100086.akpm@osdl.org

Andrew Morton wrote:
> 
> Mark Hounschell <markh@compro.net> wrote:
> >
> > Joe Korty wrote:
> > >
> > > 2.6.0-test6: the use of mlockall(2) in a process that has mmap(2)ed
> > > the registers of an IO device will hang that process uninterruptibly.
> > > The task runs in an infinite loop in get_user_pages(), invoking
> > > follow_page() forever.
> > >
> > > Using binary search I discovered that the problem was introduced
> > > in 2.5.14, specifically in ChangeSetKey
> > >
> > >     zippel@linux-m68k.org|ChangeSet|20020503210330|37095
> > >
> >
> > I know this is an old thread but can anyone tell me if this problem is
> > resolved in the current 2.6.6 kernel?
> >
> 
> There's an utterly ancient patch in -mm which might fix this.
> 
> http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.6/2.6.6-mm4/broken-out/get_user_pages-handle-VM_IO.patch

Thanks for that. I'll try it. 

Mark

  reply	other threads:[~2004-05-22 10:47 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-03 21:44 mlockall and mmap of IO devices don't mix Joe Korty
2003-10-03 22:23 ` Andrew Morton
2003-10-03 22:55   ` Joe Korty
2003-10-03 23:06     ` Andrew Morton
2003-10-03 23:28       ` Joe Korty
2003-10-03 23:15     ` Andrew Morton
2003-10-03 23:54       ` Joe Korty
2003-10-04  0:27         ` Andrew Morton
2003-10-04  5:47           ` David S. Miller
2003-10-04  9:29             ` Ingo Oeser
2004-05-21 11:34 ` Mark Hounschell
2004-05-22  2:13   ` Andrew Morton
2004-05-22 10:47     ` Mark Hounschell [this message]
2004-05-23 12:58       ` Mark Hounschell
2004-05-25 14:27     ` Joe Korty
2004-05-25 19:47       ` Andrew Morton
2004-05-25 21:31         ` Joe Korty
2004-07-16 21:01         ` Mark Hounschell
     [not found] <CFYv.787.23@gated-at.bofh.it>
2003-10-04  7:02 ` Andi Kleen
2003-10-04  7:42   ` Andrew Morton
2003-10-04  8:29     ` Andi Kleen
2003-10-04  8:47   ` Ingo Oeser
2003-10-04  9:17     ` Andi Kleen
2003-10-04  9:22       ` Russell King
2003-10-04 10:02         ` Ingo Oeser
2003-10-04 10:13           ` Russell King
2003-10-04 14:19             ` Ingo Oeser
2003-10-04 14:19               ` Ingo Oeser
2003-10-04 14:32           ` Martin J. Bligh

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