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Date: Tue, 21 May 2013 13:18:38 -0700
From: Dave Hansen <dave@sr71.net>
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Subject: Re: [PATCHv4 16/39] thp, mm: locking tail page is a bug
References: <1368321816-17719-1-git-send-email-kirill.shutemov@linux.intel.com> <1368321816-17719-17-git-send-email-kirill.shutemov@linux.intel.com>
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To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Al Viro <viro@zeniv.linux.org.uk>, Hugh Dickins <hughd@google.com>, Wu Fengguang <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>, Mel Gorman <mgorman@suse.de>, linux-mm@kvack.org, Andi Kleen <ak@linux.intel.com>, Matthew Wilcox <matthew.r.wilcox@intel.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, Hillf Danton <dhillf@gmail.com>, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org

On 05/11/2013 06:23 PM, Kirill A. Shutemov wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> 
> Locking head page means locking entire compound page.
> If we try to lock tail page, something went wrong.

Have you actually triggered this in your development?

This is another one that can theoretically get merged separately.

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>

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