From: Alex Williamson <alex.williamson@hp.com>
To: Russ Anderson <rja@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
mingo@elte.hu, tglx@linutronix.de,
Tony Luck <tony.luck@intel.com>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org
Subject: Re: [PATCH 0/2] Migrate data off physical pages with corrected
Date: Mon, 21 Jul 2008 19:11:39 +0000 [thread overview]
Message-ID: <1216667499.8806.79.camel@lappy> (raw)
In-Reply-To: <20080720173914.GA9409@sgi.com>
On Sun, 2008-07-20 at 12:39 -0500, Russ Anderson wrote:
> On Sat, Jul 19, 2008 at 12:37:11PM +0200, Andi Kleen wrote:
> > If you really wanted to do this you probably should hook it up
> > to mcelog's (or the IA64 equivalent) DIMM database
>
> Is there an IA64 equivalent? I've looked at the x86_64 mcelog,
> but have not found a IA64 version.
There's a bit in the SAL error record that can tell you when the
platform thinks the page should be deallocated. In the section header
(B2.2), ERROR_RECOVERY_INFO, bit 3 "Error threshold exceeded". If you
use this bit, then it's a platform decision. If you want pages to be
deallocated on the first hit, then have your SAL always set that bit. I
believe HP systems do implement this bit in SAL using some kind of
heuristics.
Alex
--
Alex Williamson HP Open Source & Linux Org.
WARNING: multiple messages have this Message-ID (diff)
From: Alex Williamson <alex.williamson@hp.com>
To: Russ Anderson <rja@sgi.com>
Cc: Andi Kleen <andi@firstfloor.org>,
mingo@elte.hu, tglx@linutronix.de,
Tony Luck <tony.luck@intel.com>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org
Subject: Re: [PATCH 0/2] Migrate data off physical pages with corrected memory errors (Version 7)
Date: Mon, 21 Jul 2008 13:11:39 -0600 [thread overview]
Message-ID: <1216667499.8806.79.camel@lappy> (raw)
In-Reply-To: <20080720173914.GA9409@sgi.com>
On Sun, 2008-07-20 at 12:39 -0500, Russ Anderson wrote:
> On Sat, Jul 19, 2008 at 12:37:11PM +0200, Andi Kleen wrote:
> > If you really wanted to do this you probably should hook it up
> > to mcelog's (or the IA64 equivalent) DIMM database
>
> Is there an IA64 equivalent? I've looked at the x86_64 mcelog,
> but have not found a IA64 version.
There's a bit in the SAL error record that can tell you when the
platform thinks the page should be deallocated. In the section header
(B2.2), ERROR_RECOVERY_INFO, bit 3 "Error threshold exceeded". If you
use this bit, then it's a platform decision. If you want pages to be
deallocated on the first hit, then have your SAL always set that bit. I
believe HP systems do implement this bit in SAL using some kind of
heuristics.
Alex
--
Alex Williamson HP Open Source & Linux Org.
next prev parent reply other threads:[~2008-07-21 19:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-18 20:35 [PATCH 0/2] Migrate data off physical pages with corrected memory errors (Version 7) Russ Anderson
2008-07-18 20:35 ` Russ Anderson
2008-07-19 10:37 ` Andi Kleen
2008-07-19 10:37 ` Andi Kleen
2008-07-19 12:13 ` Matthew Wilcox
2008-07-19 12:13 ` Matthew Wilcox
2008-07-19 15:06 ` Andi Kleen
2008-07-19 15:06 ` Andi Kleen
2008-07-20 17:50 ` Russ Anderson
2008-07-20 17:50 ` Russ Anderson
2008-07-20 17:39 ` Russ Anderson
2008-07-20 17:39 ` Russ Anderson
2008-07-21 19:11 ` Alex Williamson [this message]
2008-07-21 19:11 ` Alex Williamson
2008-07-21 19:45 ` Russ Anderson
2008-07-21 19:45 ` Russ Anderson
2008-07-21 19:40 ` Andi Kleen
2008-07-21 19:40 ` Andi Kleen
2008-07-28 21:44 ` Russ Anderson
2008-07-28 21:44 ` Russ Anderson
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