linux-kernel - Re: [PATCH 3/4] HWPOISON: Report correct address granuality for AO huge page errors

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Date:	Thu, 7 Oct 2010 09:38:48 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	fengguang.wu@...el.com, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 3/4] HWPOISON: Report correct address granuality for AO
 huge page errors

On Thu, Oct 07, 2010 at 09:31:20AM +0900, Naoya Horiguchi wrote:
> > @@ -198,7 +199,8 @@ static int kill_proc_ao(struct task_struct *t, unsigned long addr, int trapno,
> >  #ifdef __ARCH_SI_TRAPNO
> >  	si.si_trapno = trapno;
> >  #endif
> > -	si.si_addr_lsb = PAGE_SHIFT;
> > +	order = PageCompound(page) ? huge_page_order(page) : PAGE_SHIFT;
>                                                      ^^^^
>                                      huge_page_order(page_hstate(page)) ?

Ok.

> >  				printk(KERN_ERR
> >  		"MCE %#lx: forcibly killing %s:%d because of failure to unmap corrupted page\n",
> > -					pfn, tk->tsk->comm, tk->tsk->pid);
> > +					pfn,	
> > +					tk->tsk->comm, tk->tsk->pid);
> 
> What's the point of this change?

Probably left over from an earlier version; I will drop that hunk thanks.


-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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