From: Nick Piggin <npiggin@suse.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>,
tytso@mit.edu, hch@infradead.org, mfasheh@suse.com,
aia21@cantab.net, hugh.dickins@tiscali.co.uk,
swhiteho@redhat.com, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
fengguang.wu@intel.com,
Satoshi OSHIMA <satoshi.oshima.fk@hitachi.com>,
Taketoshi Sakuraba <taketoshi.sakuraba.hc@hitachi.com>
Subject: Re: [PATCH] [16/19] HWPOISON: Enable .remove_error_page for migration aware file systems
Date: Wed, 12 Aug 2009 10:46:13 +0200 [thread overview]
Message-ID: <20090812084613.GB32342@wotan.suse.de> (raw)
In-Reply-To: <20090812082331.GD28848@basil.fritz.box>
On Wed, Aug 12, 2009 at 10:23:31AM +0200, Andi Kleen wrote:
> > page corruption, IMO, because by definition they should be able to
> > tolerate panic. But if they do not know about this change to -EIO
> > semantics, then it is quite possible to cause problems.
>
> There's no change really. You already have this problem with
> any metadata error, which can cause similar trouble.
> If the application handles those correctly it will also
> handle hwpoison correctly.
What do you mean metadata error?
To be clear, we're talking about safety given by a panic on any
memory error, versus safety of this hwpoison code (specifically
which removes dirty pagecache pages as -EIO).
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next prev parent reply other threads:[~2009-08-12 8:46 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-05 9:36 [PATCH] [0/19] HWPOISON: Intro Andi Kleen
2009-08-05 9:36 ` [PATCH] [1/19] HWPOISON: Add page flag for poisoned pages Andi Kleen
2009-08-05 9:36 ` [PATCH] [2/19] HWPOISON: Export some rmap vma locking to outside world Andi Kleen
2009-08-05 9:36 ` [PATCH] [3/19] HWPOISON: Add support for poison swap entries v2 Andi Kleen
2009-08-05 9:36 ` [PATCH] [4/19] HWPOISON: Add new SIGBUS error codes for hardware poison signals Andi Kleen
2009-08-05 9:36 ` [PATCH] [5/19] HWPOISON: Add basic support for poisoned pages in fault handler v3 Andi Kleen
2009-08-05 9:36 ` [PATCH] [6/19] HWPOISON: Add various poison checks in mm/memory.c v2 Andi Kleen
2009-08-05 9:36 ` [PATCH] [7/19] HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2 Andi Kleen
2009-08-05 9:36 ` [PATCH] [8/19] HWPOISON: Use bitmask/action code for try_to_unmap behaviour Andi Kleen
2009-08-05 9:36 ` [PATCH] [9/19] HWPOISON: Handle hardware poisoned pages in try_to_unmap Andi Kleen
2009-08-05 9:36 ` [PATCH] [10/19] HWPOISON: check and isolate corrupted free pages v2 Andi Kleen
2009-08-05 9:36 ` [PATCH] [11/19] HWPOISON: Refactor truncate to allow direct truncating of page v2 Andi Kleen
2009-08-05 10:20 ` Nick Piggin
2009-08-05 12:37 ` Wu Fengguang
2009-08-05 13:46 ` Andi Kleen
2009-08-05 14:01 ` Nick Piggin
2009-08-05 14:10 ` Andi Kleen
2009-08-05 14:16 ` Nick Piggin
2009-08-05 14:41 ` Andi Kleen
2009-08-05 14:44 ` Nick Piggin
2009-08-05 15:00 ` Matthew Wilcox
2009-08-06 11:48 ` Martin Schwidefsky
2009-08-06 12:04 ` Andi Kleen
2009-08-05 15:12 ` Wu Fengguang
2009-08-05 9:36 ` [PATCH] [12/19] HWPOISON: Add invalidate_inode_page Andi Kleen
2009-08-05 9:36 ` [PATCH] [13/19] HWPOISON: Define a new error_remove_page address space op for async truncation Andi Kleen
2009-08-05 9:36 ` [PATCH] [14/19] HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process Andi Kleen
2009-08-05 9:36 ` [PATCH] [15/19] HWPOISON: The high level memory error handler in the VM v7 Andi Kleen
2009-08-05 9:36 ` [PATCH] [16/19] HWPOISON: Enable .remove_error_page for migration aware file systems Andi Kleen
2009-08-05 11:12 ` Christoph Hellwig
2009-08-05 11:52 ` Wu Fengguang
2009-08-05 13:50 ` Andi Kleen
2009-08-10 6:36 ` Hidehiro Kawai
2009-08-10 7:07 ` Wu Fengguang
2009-08-11 3:48 ` Hidehiro Kawai
2009-08-11 6:59 ` Andi Kleen
2009-08-11 12:38 ` Wu Fengguang
2009-08-10 7:44 ` Andi Kleen
2009-08-11 3:50 ` Hidehiro Kawai
2009-08-11 7:17 ` Andi Kleen
2009-08-12 2:49 ` Hidehiro Kawai
2009-08-12 7:46 ` Andi Kleen
2009-08-12 9:52 ` Hidehiro Kawai
2009-08-12 10:16 ` Andi Kleen
2009-08-12 8:05 ` Nick Piggin
2009-08-12 8:23 ` Andi Kleen
2009-08-12 8:46 ` Nick Piggin [this message]
2009-08-12 8:57 ` Andi Kleen
2009-08-12 9:05 ` Nick Piggin
2009-08-12 9:39 ` Wu Fengguang
2009-08-05 9:36 ` [PATCH] [17/19] HWPOISON: Enable error_remove_page for NFS Andi Kleen
2009-08-05 9:36 ` [PATCH] [18/19] HWPOISON: Add madvise() based injector for hardware poisoned pages v3 Andi Kleen
2009-08-05 9:36 ` [PATCH] [19/19] HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs Andi Kleen
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