linux-kernel - Re: [RESEND PATCH v2 1/4] mm/hwpoison: fix traverse hugetlbfs page to avoid printk flood

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Date:	Mon, 16 Sep 2013 18:09:57 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Wu, Fengguang" <fengguang.wu@...el.com>,
	"gong.chen@...ux.intel.com" <gong.chen@...ux.intel.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH v2 1/4] mm/hwpoison: fix traverse hugetlbfs page to
 avoid printk flood

On Mon, Sep 16, 2013 at 09:50:06PM +0000, Luck, Tony wrote:
> This is good - but the real solution is to stop poisoning entire huge pages ... they should
> be broken into 4K pages and just one 4K page should be poisoned.
> 
> Naoya Horiguchi: I thought that you were looking at this problem some months ago. Any progress?

Sorry, I have no meaningful progress on this. Splitting hugepages is not
a trivial operation, and introduce more complexity on hugetlbfs code.
I don't hit on any usecase of it rather than memory failure, so I'm not
sure that it's worth doing now.

Thanks,
Naoya Horiguchi
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