From: "Larry H." <research@subreption.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: 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: Wed, 27 May 2009 13:35:11 -0700 [thread overview]
Message-ID: <20090527203511.GA26530@oblivion.subreption.com> (raw)
In-Reply-To: <20090527201226.CCCBB1D028F@basil.firstfloor.org>
On 22:12 Wed 27 May , Andi Kleen 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.
>
> The page flags wars seem to be over, so it shouldn't be a problem
> to get a new one.
I gave a look to your patchset and this is yet another case in which the
only way to truly control the allocation/release behavior at low level
(without intrusive approaches) is to -indeed- use a page flag.
If this gets merged I would like to ask Andrew and Christopher to look
at my recent memory sanitization patches. It seems the opinion about
adding new page flags isn't the same for everyone here.
Larry
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next prev parent reply other threads:[~2009-05-27 20:36 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. [this message]
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
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
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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