linux-kernel - Re: Lockless/Get_User_Pages_Fast causes Xorg 1.4.99.* to lock

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Date:	Mon, 07 Jul 2008 17:43:58 +0200
From:	Carsten Otte <cotte@...ibm.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
CC:	Hugh Dickins <hugh@...itas.com>, benh@...nel.crashing.org,
	Zan Lynx <zlynx@....org>, Ryan Hope <rmh3093@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Lockless/Get_User_Pages_Fast causes Xorg 1.4.99.* to lock

Nick Piggin wrote:
> I think we need a similar fix for s390 too. If so, then it really should
> get into 2.6.26, but this late in the release, I hope an s390 maintainer
> might be able to test and verify the fix?
I've done my best to combine mprotect, mmap and munmap a MAP_PRIVATE 
mapping on a xip file system. The system runs stable with and without 
this patch. Could someone please enlighten me on how to reproduce the 
problem so that I can verify the fix?
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