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From: Keith Packard <keithp@keithp.com>
To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
	Eric Anholt <eric@anholt.net>
Cc: keithp@keithp.com, Theodore Tso <tytso@mit.edu>,
	linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
	"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
	bugme-daemon@bugzilla.kernel.org, airlied@linux.ie, "Barnes,
	Jesse" <jesse.barnes@intel.com>
Subject: RE: [Bug 10732] REGRESSION: 2.6.26-rc2-git4: X server failed start onX61s laptop
Date: Sat, 17 May 2008 11:11:56 -0700	[thread overview]
Message-ID: <1211047916.27447.314.camel@koto.keithp.com> (raw)
In-Reply-To: <924EFEDD5F540B4284297C4DC59F3DEE01119B07@orsmsx423.amr.corp.intel.com>

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On Sat, 2008-05-17 at 09:02 -0700, Pallipadi, Venkatesh wrote:

> I am thinking that may be X is depending on mprotect changes somehow and
> failing when
> it cannot change PAT attributes with mprotect call. Keith earlier
> mentioned that X
> will not depend on this. May be something to do with earlier X version.
> Keith?

It looks like we can turn off read/write access, but we can't turn it
back on. So,

        mprotect (map->memory, map->size, PROT_NONE);
        mprotect (map->memory, map->size, PROT_READ|PROT_WRITE);
 
leaves the memory with no access.

Eric saw this last week; I don't know whether he debugged into it
further.

Which repository is commit 1c12c4cf in?

-- 
keith.packard@intel.com

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  parent reply	other threads:[~2008-05-17 18:12 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-17  7:32 REGRESSION: 2.6.26-rc2-git4: X server failed start on X61s laptop Theodore Ts'o
2008-05-17  9:49 ` Sitsofe Wheeler
2008-05-17 13:21 ` Pallipadi, Venkatesh
2008-05-17 15:41   ` [Bug 10732] " Theodore Tso
2008-05-17 16:02     ` [Bug 10732] REGRESSION: 2.6.26-rc2-git4: X server failed start onX61s laptop Pallipadi, Venkatesh
2008-05-17 16:53       ` Theodore Tso
2008-05-17 18:11       ` Keith Packard [this message]
2008-05-17 18:32         ` Gabriel C
2008-05-17 18:46           ` Theodore Tso
2008-05-19 21:25             ` Hugh Dickins
2008-05-19 23:04               ` Jeremy Fitzhardinge
2008-05-19 23:10               ` Linus Torvalds
2008-05-20  2:33                 ` Linus Torvalds
2008-05-20  4:14                 ` Hugh Dickins
2008-05-20  7:32                   ` Jeremy Fitzhardinge
2008-05-20  7:31                 ` Jeremy Fitzhardinge
2008-06-02 21:21                 ` Fix for asm warning in head_32.S Joe Korty
2008-05-17 16:36     ` [Bug 10732] REGRESSION: 2.6.26-rc2-git4: X server failed start on X61s laptop Arjan van de Ven

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