From: William Lee Irwin III <wli@holomorphy.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Andy Isaacson <adi@hexapodia.org>,
Linus Torvalds <torvalds@osdl.org>,
"David S. Miller" <davem@davemloft.net>,
linux-kernel@vger.kernel.org, tglx@linutronix.de, akpm@osdl.org
Subject: Re: VM fixes [->used_math to PF_USED_MATH] [6/4]
Date: Sat, 8 Jan 2005 09:17:11 -0800 [thread overview]
Message-ID: <20050108171711.GW9636@holomorphy.com> (raw)
In-Reply-To: <20050102154148.GA5164@dualathlon.random>
On Sun, Dec 26, 2004 at 11:03:09PM -0800, Andy Isaacson wrote:
>> I can't find any authoritative source for that assertion, but google
>> supports it:
>> http://sources.redhat.com/ml/libc-alpha/2002-09/msg00328.html
On Sun, Jan 02, 2005 at 04:41:48PM +0100, Andrea Arcangeli wrote:
> This is a nice reference, thanks for the info (I personally only worked
> with ev6 so I probably never run in the exact features and history of
> the older chips).
> All issues with ev4+smp/preempt and ev5+smp/preempt should be fixed with
> the two incremental patches I posted last week that make PF_MEMDIE a
> TIF_MEMDIE and used_math a PF_USED_MATH and that fixes the PF_MEMDIE
> race that existed on all archs in mainline 2.6 and that AFIK Wli even
> managed to reproduce once.
Reproduced only once ever on x86-64, but reliably reproducible on all
other 64-bit architectures. 32-bit architectures have resource
scalability issues that make the particular exploit I wrote ineffective.
-- wli
next prev parent reply other threads:[~2005-01-08 17:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-24 17:41 VM fixes [4/4] Andrea Arcangeli
2004-12-24 18:01 ` David S. Miller
2004-12-24 18:22 ` Andrea Arcangeli
2004-12-24 20:55 ` David S. Miller
2004-12-24 21:25 ` William Lee Irwin III
2004-12-24 23:52 ` William Lee Irwin III
2004-12-24 23:55 ` David S. Miller
2004-12-24 23:41 ` Linus Torvalds
2004-12-25 2:27 ` Andrea Arcangeli
2004-12-25 3:24 ` VM fixes [PF_MEMDIE to TIF_MEMDIE] [5/4] Andrea Arcangeli
2004-12-25 14:53 ` VM fixes [->used_math to PF_USED_MATH] [6/4] Andrea Arcangeli
2004-12-27 7:03 ` Andy Isaacson
2005-01-02 15:41 ` Andrea Arcangeli
2005-01-08 17:17 ` William Lee Irwin III [this message]
2004-12-25 0:06 ` VM fixes [4/4] Mitchell Blank Jr
2004-12-25 2:37 ` Andrea Arcangeli
2004-12-24 23:32 ` Linus Torvalds
2004-12-27 13:38 ` Rik van Riel
2004-12-28 9:42 ` Thomas Gleixner
2005-01-02 15:51 ` Andrea Arcangeli
2005-01-02 16:44 ` Rik van Riel
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