From: Robin Holt <holt@sgi.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hugh@veritas.com>, Robin Holt <holt@sgi.com>,
Roland McGrath <roland@redhat.com>,
linux-mm@kvack.org
Subject: Re: get_user_pages() with write=1 and force=1 gets read-only pages.
Date: Sun, 31 Jul 2005 05:52:34 -0500 [thread overview]
Message-ID: <20050731105234.GA2254@lnx-holt.americas.sgi.com> (raw)
In-Reply-To: <42EC2ED6.2070700@yahoo.com.au>
Should there be a check to ensure we don't return VM_FAULT_RACE when the
pte which was inserted is exactly the same one we would have inserted?
Could we generalize that more to the point of only returning VM_FAULT_RACE
when write access was requested but the racing pte was not writable?
Most of the test cases I have thrown at this have gotten the writer
faulting first which did not result in problems. I would hate to slow
things down if not necessary. I am unaware of more issues than the one
I have been tripping.
Thanks,
Robin Holt
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next prev parent reply other threads:[~2005-07-31 10:52 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-30 20:53 Robin Holt
2005-07-30 22:13 ` Hugh Dickins
2005-07-31 1:52 ` Nick Piggin
2005-07-31 10:52 ` Robin Holt [this message]
2005-07-31 11:07 ` Nick Piggin
2005-07-31 11:30 ` Robin Holt
2005-07-31 11:39 ` Robin Holt
2005-07-31 12:09 ` Robin Holt
2005-07-31 22:27 ` Nick Piggin
2005-08-01 3:22 ` Roland McGrath
2005-08-01 8:21 ` [patch 2.6.13-rc4] fix get_user_pages bug Nick Piggin
2005-08-01 9:19 ` Ingo Molnar
2005-08-01 9:27 ` Nick Piggin
2005-08-01 10:15 ` Ingo Molnar
2005-08-01 10:57 ` Nick Piggin
2005-08-01 19:43 ` Hugh Dickins
2005-08-01 20:08 ` Linus Torvalds
2005-08-01 21:06 ` Hugh Dickins
2005-08-01 21:51 ` Linus Torvalds
2005-08-01 22:01 ` Linus Torvalds
2005-08-02 12:01 ` Martin Schwidefsky
2005-08-02 12:26 ` Hugh Dickins
2005-08-02 12:28 ` Nick Piggin
2005-08-02 15:19 ` Martin Schwidefsky
2005-08-02 15:30 ` Linus Torvalds
2005-08-02 16:03 ` Hugh Dickins
2005-08-02 16:25 ` Linus Torvalds
2005-08-02 17:02 ` Linus Torvalds
2005-08-02 17:27 ` Hugh Dickins
2005-08-02 17:21 ` Hugh Dickins
2005-08-02 18:47 ` Linus Torvalds
2005-08-02 19:20 ` Hugh Dickins
2005-08-02 19:54 ` Linus Torvalds
2005-08-02 20:55 ` Hugh Dickins
2005-08-03 10:24 ` Nick Piggin
2005-08-03 11:47 ` Hugh Dickins
2005-08-03 12:13 ` Nick Piggin
2005-08-03 16:12 ` Linus Torvalds
2005-08-03 16:39 ` Linus Torvalds
2005-08-03 16:42 ` Linus Torvalds
2005-08-03 17:12 ` Hugh Dickins
2005-08-03 23:03 ` Nick Piggin
2005-08-04 14:14 ` Alexander Nyberg
2005-08-04 14:30 ` Nick Piggin
2005-08-04 15:00 ` Alexander Nyberg
2005-08-04 15:35 ` Hugh Dickins
2005-08-04 16:32 ` Russell King
2005-08-04 15:36 ` Linus Torvalds
2005-08-04 16:29 ` Russell King
2005-08-03 10:24 ` Martin Schwidefsky
2005-08-03 11:57 ` Hugh Dickins
2005-08-02 16:44 ` Martin Schwidefsky
2005-08-01 15:42 ` Linus Torvalds
2005-08-01 18:18 ` Linus Torvalds
2005-08-03 8:24 ` Robin Holt
2005-08-03 11:31 ` Hugh Dickins
2005-08-04 11:48 ` Robin Holt
2005-08-04 13:04 ` Hugh Dickins
2005-08-01 19:29 ` Hugh Dickins
2005-08-01 19:48 ` Linus Torvalds
2005-08-02 8:07 ` Martin Schwidefsky
2005-08-01 19:57 ` Andrew Morton
2005-08-01 20:16 ` Linus Torvalds
2005-08-02 0:14 ` Nick Piggin
2005-08-02 1:27 ` Nick Piggin
2005-08-02 3:45 ` Linus Torvalds
2005-08-02 4:25 ` Nick Piggin
2005-08-02 4:35 ` Linus Torvalds
2005-08-01 20:03 ` Hugh Dickins
2005-08-01 20:12 ` Andrew Morton
2005-08-01 20:26 ` Linus Torvalds
2005-08-01 20:51 ` Hugh Dickins
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