linux-kernel - Re: [PATCH 12/24] HWPOISON: make it possible to unpoison pages

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Date:	Wed, 2 Dec 2009 21:31:26 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 12/24] HWPOISON: make it possible to unpoison pages

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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