From: Andi Kleen <andi@firstfloor.org>
To: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, fengguang.wu@intel.com
Subject: Re: [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages
Date: Fri, 29 May 2009 18:37:57 +0200 [thread overview]
Message-ID: <20090529163757.GX1065@one.firstfloor.org> (raw)
In-Reply-To: <4A2008F0.1070304@redhat.com>
On Fri, May 29, 2009 at 12:10:24PM -0400, Rik van Riel wrote:
> Andi Kleen wrote:
> >On Wed, May 27, 2009 at 10:15:10PM +0100, Alan Cox wrote:
> >>On Wed, 27 May 2009 22:12:26 +0200 (CEST)
> >>Andi Kleen <andi@firstfloor.org> wrote:
> >>
> >>>Hardware poisoned pages need special handling in the VM and shouldn't be
> >>>touched again. This requires a new page flag. Define it here.
> >>Why can't you use PG_reserved ? That already indicates the page may not
> >>even be present (which is effectively your situation at that point).
> >
> >Right now a page must be present with PG_reserved, otherwise /dev/mem,
> >/proc/kcore
> >lots of other things will explode.
>
> Could we use a combination of, say PG_reserved and
> PG_writeback to keep /dev/mem and /proc/kcore from
> exploding ?
They should just check for poisoned pages. Fengguang has some patches
to add checks, but they need more work before they can be merged.
The interesting part is also fixing vmcore, as in memory outside
your memory.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
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next prev parent reply other threads:[~2009-05-29 16:30 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-27 20:12 [PATCH] [0/16] HWPOISON: Intro Andi Kleen
2009-05-27 20:12 ` [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages Andi Kleen
2009-05-27 20:35 ` Larry H.
2009-05-27 21:15 ` Alan Cox
2009-05-28 7:54 ` Andi Kleen
2009-05-29 16:10 ` Rik van Riel
2009-05-29 16:37 ` Andi Kleen [this message]
2009-05-29 16:34 ` Rik van Riel
2009-05-29 18:24 ` Andi Kleen
2009-05-29 18:26 ` Rik van Riel
2009-05-29 18:42 ` Andi Kleen
2009-05-27 20:12 ` [PATCH] [2/16] HWPOISON: Export poison flag in /proc/kpageflags Andi Kleen
2009-05-29 16:37 ` Rik van Riel
2009-05-27 20:12 ` [PATCH] [3/16] HWPOISON: Export some rmap vma locking to outside world Andi Kleen
2009-05-27 20:12 ` [PATCH] [4/16] HWPOISON: Add support for poison swap entries v2 Andi Kleen
2009-05-28 8:46 ` Hidehiro Kawai
2009-05-28 9:11 ` Wu Fengguang
2009-05-28 10:42 ` Andi Kleen
2009-05-27 20:12 ` [PATCH] [5/16] HWPOISON: Add new SIGBUS error codes for hardware poison signals Andi Kleen
2009-05-27 20:12 ` [PATCH] [6/16] HWPOISON: Add basic support for poisoned pages in fault handler v2 Andi Kleen
2009-05-29 4:15 ` Hidehiro Kawai
2009-05-29 6:28 ` Andi Kleen
2009-05-27 20:12 ` [PATCH] [7/16] HWPOISON: Add various poison checks in mm/memory.c Andi Kleen
2009-05-27 20:12 ` [PATCH] [8/16] HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler Andi Kleen
2009-05-27 20:12 ` [PATCH] [9/16] HWPOISON: Use bitmask/action code for try_to_unmap behaviour Andi Kleen
2009-05-28 7:27 ` Nick Piggin
2009-05-28 8:03 ` Andi Kleen
2009-05-28 8:28 ` Nick Piggin
2009-05-28 9:02 ` Andi Kleen
2009-05-28 12:26 ` Nick Piggin
2009-05-27 20:12 ` [PATCH] [10/16] HWPOISON: Handle hardware poisoned pages in try_to_unmap Andi Kleen
2009-05-27 20:12 ` [PATCH] [11/16] HWPOISON: Handle poisoned pages in set_page_dirty() Andi Kleen
2009-05-27 20:12 ` [PATCH] [12/16] HWPOISON: check and isolate corrupted free pages Andi Kleen
2009-05-27 20:12 ` [PATCH] [13/16] HWPOISON: The high level memory error handler in the VM v3 Andi Kleen
2009-05-28 8:26 ` Nick Piggin
2009-05-28 9:31 ` Andi Kleen
2009-05-28 12:08 ` Nick Piggin
2009-05-28 13:45 ` Andi Kleen
2009-05-28 14:50 ` Wu Fengguang
2009-06-04 6:25 ` Nai Xia
2009-06-07 16:02 ` Wu Fengguang
2009-06-08 11:06 ` Nai Xia
2009-06-08 12:31 ` Wu Fengguang
2009-06-08 14:46 ` Nai Xia
2009-06-09 6:48 ` Wu Fengguang
2009-06-09 10:48 ` Nick Piggin
2009-06-09 12:15 ` Wu Fengguang
2009-06-09 12:17 ` Nick Piggin
2009-06-09 12:47 ` Wu Fengguang
2009-06-09 13:36 ` Nai Xia
2009-05-28 16:56 ` Russ Anderson
2009-05-30 6:42 ` Andi Kleen
2009-06-01 11:39 ` Nick Piggin
2009-06-01 18:19 ` Andi Kleen
2009-06-01 12:05 ` Nick Piggin
2009-06-01 18:51 ` Andi Kleen
2009-06-02 12:10 ` Nick Piggin
2009-06-02 12:34 ` Andi Kleen
2009-06-02 12:37 ` Nick Piggin
2009-06-02 12:55 ` Andi Kleen
2009-06-02 13:03 ` Nick Piggin
2009-06-02 13:20 ` Andi Kleen
2009-06-02 13:19 ` Nick Piggin
2009-06-02 13:46 ` Andi Kleen
2009-06-02 13:47 ` Nick Piggin
2009-06-02 14:05 ` Andi Kleen
2009-06-02 13:30 ` Wu Fengguang
2009-06-02 14:07 ` Nick Piggin
2009-05-28 9:59 ` Wu Fengguang
2009-05-28 10:11 ` Andi Kleen
2009-05-28 10:33 ` Wu Fengguang
2009-05-28 10:51 ` Andi Kleen
2009-05-28 11:03 ` Wu Fengguang
2009-05-28 12:15 ` Nick Piggin
2009-05-28 13:48 ` Andi Kleen
2009-05-28 12:23 ` Nick Piggin
2009-05-28 13:54 ` Wu Fengguang
2009-06-01 11:50 ` Nick Piggin
2009-06-01 14:05 ` Wu Fengguang
2009-06-01 14:40 ` Nick Piggin
2009-06-02 11:14 ` Wu Fengguang
2009-06-02 12:19 ` Nick Piggin
2009-06-02 12:51 ` Wu Fengguang
2009-06-02 14:33 ` Nick Piggin
2009-06-03 10:21 ` Jens Axboe
2009-06-01 21:11 ` Hugh Dickins
2009-06-01 21:41 ` Andi Kleen
2009-06-01 18:32 ` Andi Kleen
2009-06-02 12:00 ` Nick Piggin
2009-06-02 12:47 ` Andi Kleen
2009-06-02 12:57 ` Nick Piggin
2009-06-02 13:25 ` Andi Kleen
2009-06-02 13:24 ` Nick Piggin
2009-06-02 13:41 ` Andi Kleen
2009-06-02 13:40 ` Nick Piggin
2009-06-02 13:53 ` Wu Fengguang
2009-06-02 14:06 ` Andi Kleen
2009-06-02 14:12 ` Wu Fengguang
2009-06-02 14:21 ` Nick Piggin
2009-06-02 13:46 ` Wu Fengguang
2009-06-02 14:08 ` Andi Kleen
2009-06-02 14:10 ` Wu Fengguang
2009-06-02 14:14 ` Nick Piggin
2009-06-02 15:17 ` Nick Piggin
2009-06-02 17:27 ` Andi Kleen
2009-06-03 9:35 ` Nick Piggin
2009-06-03 11:24 ` Andi Kleen
2009-06-02 13:02 ` Wu Fengguang
2009-06-02 15:09 ` Nick Piggin
2009-06-02 17:19 ` Andi Kleen
2009-06-03 6:24 ` Nick Piggin
2009-06-03 15:51 ` Wu Fengguang
2009-06-03 16:05 ` Andi Kleen
2009-05-27 20:12 ` [PATCH] [14/16] HWPOISON: FOR TESTING: Enable memory failure code unconditionally Andi Kleen
2009-05-27 20:12 ` [PATCH] [15/16] HWPOISON: Add madvise() based injector for hardware poisoned pages v3 Andi Kleen
2009-05-27 20:12 ` [PATCH] [16/16] HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2009-05-29 21:35 [PATCH] [0/16] HWPOISON: Intro Andi Kleen
2009-05-29 21:35 ` [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages Andi Kleen
2009-05-29 21:52 ` Alan Cox
2009-06-03 18:46 [PATCH] [0/16] HWPOISON: Intro Andi Kleen
2009-06-03 18:46 ` [PATCH] [1/16] HWPOISON: Add page flag for poisoned pages Andi Kleen
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