From: Rik van Riel <riel@redhat.com>
To: Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, Hugh Dickins <hughd@google.com>,
Mel Gorman <mgorman@techsingularity.net>,
Jan Vorlicek <janvorli@microsoft.com>,
Aditya Mandaleeka <adityam@microsoft.com>
Subject: Re: [PATCH 1/2] mm: vm_page_prot: update with WRITE_ONCE/READ_ONCE
Date: Thu, 15 Sep 2016 14:27:34 -0400 [thread overview]
Message-ID: <1473964054.10218.91.camel@redhat.com> (raw)
In-Reply-To: <1473961304-19370-2-git-send-email-aarcange@redhat.com>
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On Thu, 2016-09-15 at 19:41 +0200, Andrea Arcangeli wrote:
> vma->vm_page_prot is read lockless from the rmap_walk, it may be
> updated concurrently and this prevents the risk of reading
> intermediate values.
>
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
--
All rights reversed
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next prev parent reply other threads:[~2016-09-15 18:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-15 17:41 [PATCH 0/2] vma_merge vs rmap_walk SMP race condition fix Andrea Arcangeli
2016-09-15 17:41 ` [PATCH 1/2] mm: vm_page_prot: update with WRITE_ONCE/READ_ONCE Andrea Arcangeli
2016-09-15 18:27 ` Rik van Riel [this message]
2016-09-15 17:41 ` [PATCH 2/2] mm: vma_merge: fix race vm_page_prot race condition against rmap_walk Andrea Arcangeli
2016-09-15 18:28 ` Rik van Riel
2016-09-16 18:42 ` Hugh Dickins
2016-09-16 20:54 ` Andrea Arcangeli
2016-09-17 16:05 ` [PATCH 0/1] mm: vma_merge: fix vm_page_prot SMP race condition against rmap_walk v2 Andrea Arcangeli
2016-09-17 16:05 ` [PATCH 1/1] mm: vma_merge: fix vm_page_prot SMP race condition against rmap_walk Andrea Arcangeli
2016-09-18 0:36 ` Andrea Arcangeli
2016-09-19 18:25 ` [PATCH 1/2] " Andrea Arcangeli
2016-09-19 18:25 ` [PATCH 2/2] mm: vma_adjust: remove superfluous check for next not NULL Andrea Arcangeli
2016-09-22 10:36 ` [PATCH 1/2] mm: vma_merge: fix vm_page_prot SMP race condition against rmap_walk Hugh Dickins
2016-09-23 19:18 ` Andrea Arcangeli
2016-09-23 20:25 ` Hugh Dickins
2016-09-28 5:09 ` [lkp] [mm] 2129957506: kernel BUG at mm/mmap.c:329! kernel test robot
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