From: Ingo Molnar <mingo@elte.hu>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>, Matt Mackall <mpm@selenic.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-mm@kvack.org
Subject: Re: [PATCH 8/8] pagemap: export PG_hwpoison
Date: Fri, 8 May 2009 13:49:36 +0200 [thread overview]
Message-ID: <20090508114936.GC17129@elte.hu> (raw)
In-Reply-To: <20090508111032.121067794@intel.com>
* Wu Fengguang <fengguang.wu@intel.com> wrote:
> This flag indicates a hardware detected memory corruption on the
> page. Any future access of the page data may bring down the
> machine.
NAK on this whole idea, it's utterly harmful. At _minimum_
/proc/kpageflags should be moved to /debug/vm/ to not have
any ABI bindings.
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>, Matt Mackall <mpm@selenic.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-mm@kvack.org
Subject: Re: [PATCH 8/8] pagemap: export PG_hwpoison
Date: Fri, 8 May 2009 13:49:36 +0200 [thread overview]
Message-ID: <20090508114936.GC17129@elte.hu> (raw)
In-Reply-To: <20090508111032.121067794@intel.com>
* Wu Fengguang <fengguang.wu@intel.com> wrote:
> This flag indicates a hardware detected memory corruption on the
> page. Any future access of the page data may bring down the
> machine.
NAK on this whole idea, it's utterly harmful. At _minimum_
/proc/kpageflags should be moved to /debug/vm/ to not have
any ABI bindings.
Ingo
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next prev parent reply other threads:[~2009-05-08 11:50 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 10:53 [PATCH 0/8] export more page flags in /proc/kpageflags (take 6) Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 1/8] mm: introduce PageHuge() for testing huge/gigantic pages Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 11:40 ` Ingo Molnar
2009-05-08 11:40 ` Ingo Molnar
2009-05-08 12:21 ` Wu Fengguang
2009-05-08 12:21 ` Wu Fengguang
2009-05-13 17:05 ` Mel Gorman
2009-05-13 17:05 ` Mel Gorman
2009-05-17 13:09 ` Wu Fengguang
2009-05-17 13:09 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 2/8] slob: use PG_slab for identifying SLOB pages Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 3/8] proc: kpagecount/kpageflags code cleanup Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 4/8] proc: export more page flags in /proc/kpageflags Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 11:47 ` Ingo Molnar
2009-05-08 11:47 ` Ingo Molnar
2009-05-08 12:44 ` Wu Fengguang
2009-05-08 12:44 ` Wu Fengguang
2009-05-09 5:59 ` Ingo Molnar
2009-05-09 5:59 ` Ingo Molnar
2009-05-09 7:56 ` Wu Fengguang
2009-05-09 7:56 ` Wu Fengguang
2009-05-09 6:27 ` [patch] tracing/mm: add page frame snapshot trace Ingo Molnar
2009-05-09 6:27 ` Ingo Molnar
2009-05-09 9:13 ` Wu Fengguang
2009-05-09 9:13 ` Wu Fengguang
2009-05-09 9:24 ` Ingo Molnar
2009-05-09 9:24 ` Ingo Molnar
2009-05-09 9:43 ` Wu Fengguang
2009-05-09 9:43 ` Wu Fengguang
2009-05-09 10:22 ` Ingo Molnar
2009-05-09 10:22 ` Ingo Molnar
2009-05-09 10:45 ` Wu Fengguang
2009-05-09 10:45 ` Wu Fengguang
2009-05-09 10:01 ` Ingo Molnar
2009-05-09 10:01 ` Ingo Molnar
2009-05-09 10:27 ` Ingo Molnar
2009-05-09 10:27 ` Ingo Molnar
2009-05-09 10:57 ` Wu Fengguang
2009-05-09 10:57 ` Wu Fengguang
2009-05-09 11:05 ` Ingo Molnar
2009-05-09 11:05 ` Ingo Molnar
2009-05-09 12:23 ` Wu Fengguang
2009-05-09 12:23 ` Wu Fengguang
2009-05-09 14:05 ` Ingo Molnar
2009-05-09 14:05 ` Ingo Molnar
2009-05-10 8:35 ` Wu Fengguang
2009-05-10 8:35 ` Wu Fengguang
2009-05-11 12:01 ` Ingo Molnar
2009-05-11 12:01 ` Ingo Molnar
2009-05-09 10:36 ` Ingo Molnar
2009-05-09 10:36 ` Ingo Molnar
2009-05-08 12:58 ` ftrace: concurrent accesses possible? Wu Fengguang
2009-05-08 12:58 ` Wu Fengguang
2009-05-08 13:17 ` Steven Rostedt
2009-05-08 13:17 ` Steven Rostedt
2009-05-08 13:43 ` Wu Fengguang
2009-05-08 13:43 ` Wu Fengguang
2009-05-08 20:24 ` [PATCH 4/8] proc: export more page flags in /proc/kpageflags Andrew Morton
2009-05-08 20:24 ` Andrew Morton
2009-05-09 10:44 ` Ingo Molnar
2009-05-09 10:44 ` Ingo Molnar
2009-05-10 3:58 ` Andrew Morton
2009-05-10 3:58 ` Andrew Morton
2009-05-10 5:26 ` Andrew Morton
2009-05-10 5:26 ` Andrew Morton
2009-05-11 11:45 ` Ingo Molnar
2009-05-11 11:45 ` Ingo Molnar
2009-05-11 18:31 ` Andrew Morton
2009-05-11 18:31 ` Andrew Morton
2009-05-11 22:08 ` Ingo Molnar
2009-05-11 22:08 ` Ingo Molnar
2009-05-11 19:03 ` Andy Isaacson
2009-05-11 19:03 ` Andy Isaacson
2009-05-08 10:53 ` [PATCH 5/8] pagemap: document clarifications Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 6/8] pagemap: document 9 more exported page flags Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-09 8:13 ` KOSAKI Motohiro
2009-05-09 8:13 ` KOSAKI Motohiro
2009-05-09 8:18 ` Wu Fengguang
2009-05-09 8:18 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 7/8] pagemap: add page-types tool Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 10:53 ` [PATCH 8/8] pagemap: export PG_hwpoison Wu Fengguang
2009-05-08 10:53 ` Wu Fengguang
2009-05-08 11:49 ` Ingo Molnar [this message]
2009-05-08 11:49 ` Ingo Molnar
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