From: Rik van Riel <riel@redhat.com>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Hugh Dickins <hughd@google.com>, Christoph Lameter <cl@linux.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Andi Kleen <andi@firstfloor.org>, linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH 3/4] hugetlb, rmap: fix confusing page locking in hugetlb_cow()
Date: Fri, 10 Sep 2010 10:41:45 -0400 [thread overview]
Message-ID: <4C8A43A9.2030907@redhat.com> (raw)
In-Reply-To: <1284092586-1179-4-git-send-email-n-horiguchi@ah.jp.nec.com>
On 09/10/2010 12:23 AM, Naoya Horiguchi wrote:
> if(!trylock_page) block in avoidcopy path of hugetlb_cow() looks confusing
> and is buggy. Originally this trylock_page() is intended to make sure
> that old_page is locked even when old_page != pagecache_page, because then
> only pagecache_page is locked.
> This patch fixes it by moving page locking into hugetlb_fault().
>
> Signed-off-by: Naoya Horiguchi<n-horiguchi@ah.jp.nec.com>
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2010-09-10 14:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-10 4:23 [PATCH 0/4] hugetlb, rmap: fixes and cleanups Naoya Horiguchi
2010-09-10 4:23 ` [PATCH 1/4] hugetlb, rmap: always use anon_vma root pointer Naoya Horiguchi
2010-09-10 14:37 ` Andrea Arcangeli
2010-09-10 14:40 ` Rik van Riel
2010-09-10 17:19 ` Linus Torvalds
2010-09-10 21:50 ` Andi Kleen
2010-09-10 22:07 ` Linus Torvalds
2010-09-11 2:09 ` Rik van Riel
2010-09-10 4:23 ` [PATCH 2/4] hugetlb, rmap: use hugepage_add_new_anon_rmap() in hugetlb_cow() Naoya Horiguchi
2010-09-10 14:39 ` Andrea Arcangeli
2010-09-10 14:40 ` Rik van Riel
2010-09-10 4:23 ` [PATCH 3/4] hugetlb, rmap: fix confusing page locking " Naoya Horiguchi
2010-09-10 14:41 ` Rik van Riel [this message]
2010-09-10 17:15 ` Linus Torvalds
2010-09-23 23:50 ` Naoya Horiguchi
2010-09-10 4:23 ` [PATCH 4/4] hugetlb, rmap: add BUG_ON(!PageLocked) in hugetlb_add_anon_rmap() Naoya Horiguchi
2010-09-10 14:42 ` Rik van Riel
2010-09-10 14:44 ` Andrea Arcangeli
2010-09-10 9:04 ` [PATCH 0/4] hugetlb, rmap: fixes and cleanups Andi Kleen
2010-09-10 11:47 ` Naoya Horiguchi
2010-09-10 14:30 ` Andi Kleen
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