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From: Wu Fengguang <fengguang.wu@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Nick Piggin <npiggin@suse.de>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 12/24] HWPOISON: make it possible to unpoison pages
Date: Wed, 2 Dec 2009 21:31:26 +0800	[thread overview]
Message-ID: <20091202133126.GE13277@localhost> (raw)
In-Reply-To: <20091202131530.GG18989@one.firstfloor.org>

On Wed, Dec 02, 2009 at 09:15:30PM +0800, Andi Kleen wrote:
> > Note that it may leak pages silently - those who have been removed from
> > LRU cache, but not isolated from page cache/swap cache at hwpoison time.
> 
> It would be better if we could detect that somehow and at least warn.
> 
> >  }
> >  
> > +static int hwpoison_forget(void *data, u64 val)
> > +{
> > +	if (!capable(CAP_SYS_ADMIN))
> > +		return -EPERM;
> > +
> > +	return forget_memory_failure(val);
> > +}
> > +
> >  DEFINE_SIMPLE_ATTRIBUTE(hwpoison_fops, NULL, hwpoison_inject, "%lli\n");
> > +DEFINE_SIMPLE_ATTRIBUTE(unpoison_fops, NULL, hwpoison_forget, "%lli\n");
> 
> I'll rename it to unpoison, not forget. I think that's a more clear
> name.

OK. Will repost the whole updated patchset.

Thanks,
Fengguang

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  reply	other threads:[~2009-12-02 13:31 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-02  3:12 [PATCH 00/24] hwpoison fixes and stress testing filters Wu Fengguang
2009-12-02  3:12 ` [PATCH 01/24] page-types: add standard GPL license head Wu Fengguang
2009-12-02 13:08   ` Andi Kleen
2009-12-02  3:12 ` [PATCH 02/24] migrate: page could be locked by hwpoison, dont BUG() Wu Fengguang
2009-12-02 13:09   ` Andi Kleen
2009-12-02 14:50   ` Christoph Lameter
2009-12-03  1:34     ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 03/24] HWPOISON: remove the anonymous entry Wu Fengguang
2009-12-02  3:12 ` [PATCH 04/24] HWPOISON: return ENXIO on invalid pfn Wu Fengguang
2009-12-02  3:12 ` [PATCH 05/24] HWPOISON: avoid grabbing page for two times Wu Fengguang
2009-12-02  3:12 ` [PATCH 06/24] HWPOISON: abort on failed unmap Wu Fengguang
2009-12-02 13:11   ` Andi Kleen
2009-12-02 13:28     ` Wu Fengguang
2009-12-02 13:44       ` Andi Kleen
2009-12-02  3:12 ` [PATCH 07/24] HWPOISON: comment the possible set_page_dirty() race Wu Fengguang
2009-12-02  3:12 ` [PATCH 08/24] HWPOISON: comment dirty swapcache pages Wu Fengguang
2009-12-02  3:12 ` [PATCH 09/24] HWPOISON: introduce delete_from_lru_cache() Wu Fengguang
2009-12-02  3:12 ` [PATCH 10/24] HWPOISON: remove the free buddy page handler Wu Fengguang
2009-12-02 13:13   ` Andi Kleen
2009-12-02 13:31     ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 11/24] HWPOISON: detect free buddy pages explicitly Wu Fengguang
2009-12-02  3:12 ` [PATCH 12/24] HWPOISON: make it possible to unpoison pages Wu Fengguang
2009-12-02 13:15   ` Andi Kleen
2009-12-02 13:31     ` Wu Fengguang [this message]
2009-12-02 13:46     ` Wu Fengguang
2009-12-02 14:03       ` Andi Kleen
2009-12-03  1:45         ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 13/24] HWPOISON: introduce struct hwpoison_control Wu Fengguang
2009-12-02 13:15   ` Andi Kleen
2009-12-02  3:12 ` [PATCH 14/24] HWPOISON: return 0 if page is assured to be isolated Wu Fengguang
2009-12-02 12:47   ` Andi Kleen
2009-12-02 13:15     ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 15/24] HWPOISON: add fs/device filters Wu Fengguang
2009-12-02  3:12 ` [PATCH 16/24] HWPOISON: limit hwpoison injector to known page types Wu Fengguang
2009-12-02  8:11   ` Ingo Molnar
2009-12-02  3:12 ` [PATCH 17/24] mm: export stable page flags Wu Fengguang
2009-12-02  4:42   ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 18/24] HWPOISON: add page flags filter Wu Fengguang
2009-12-02  3:12 ` [PATCH 19/24] memcg: rename and export try_get_mem_cgroup_from_page() Wu Fengguang
2009-12-03  1:58   ` Balbir Singh
2009-12-02  3:12 ` [PATCH 20/24] memcg: add accessor to mem_cgroup.css Wu Fengguang
2009-12-02  3:12 ` [PATCH 21/24] cgroup: define empty css_put() when !CONFIG_CGROUPS Wu Fengguang
2009-12-02 22:48   ` Paul Menage
2009-12-02 22:52     ` Andi Kleen
2009-12-03  1:53       ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 22/24] HWPOISON: add memory cgroup filter Wu Fengguang
2009-12-02 12:44   ` Andi Kleen
2009-12-02 12:58     ` Wu Fengguang
2009-12-03  1:52       ` KAMEZAWA Hiroyuki
2009-12-03  2:19         ` Wu Fengguang
2009-12-03  2:28           ` KAMEZAWA Hiroyuki
2009-12-03  2:47             ` Wu Fengguang
2009-12-03  2:58               ` KAMEZAWA Hiroyuki
2009-12-03 15:03                 ` Wu Fengguang
2009-12-03  2:15       ` Li Zefan
2009-12-03  2:20         ` Wu Fengguang
2009-12-03  2:28         ` Wu Fengguang
2009-12-02  3:12 ` [PATCH 23/24] HWPOISON: add an interface to switch off/on all the page filters Wu Fengguang
2009-12-02  3:12 ` [PATCH 24/24] HWPOISON: show corrupted file info Wu Fengguang
2009-12-02 13:20   ` Andi Kleen
2009-12-02 13:37     ` Wu Fengguang

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