From: "Stephen C. Tweedie" <sct@redhat.com>
To: Alexander Viro <viro@math.psu.edu>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Manfred Spraul <manfreds@colorfullife.com>,
Andrea Arcangeli <andrea@suse.de>,
linux-kernel@vger.rutgers.edu,
Ingo Molnar <mingo@chiara.csoma.elte.hu>,
linux-mm@kvack.org
Subject: Re: locking question: do_mmap(), do_munmap()
Date: Wed, 13 Oct 1999 11:25:36 +0100 (BST) [thread overview]
Message-ID: <14340.24096.808136.514437@dukat.scot.redhat.com> (raw)
In-Reply-To: <Pine.GSO.4.10.9910111823320.18777-100000@weyl.math.psu.edu>
Hi,
On Mon, 11 Oct 1999 18:31:37 -0400 (EDT), Alexander Viro
<viro@math.psu.edu> said:
> And spinlock being released in the ->swapout() is outright ugly. OK, so
> we are adding to mm_struct a new semaphore (vma_sem) and getting it around
> the places where the list is modified + in the swapper (for scanning). In
> normal situation it will never give us contention - everyone except
> swapper uses it with mmap_sem already held. Are there any objections
> against it? If it's OK I'll go ahead and do it. Comments?
Looks OK as long as the swapper remains non-recursive and we never, ever
allocate memory outside the swapper with vma_sem held.
--Stephen
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next prev parent reply other threads:[~1999-10-13 10:25 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.10.9910101713010.364-100000@alpha.random>
1999-10-10 15:52 ` Manfred Spraul
1999-10-10 16:07 ` Alexander Viro
1999-10-10 16:25 ` Alexander Viro
1999-10-10 16:45 ` Manfred Spraul
1999-10-10 17:25 ` Alexander Viro
1999-10-10 17:12 ` Andrea Arcangeli
1999-10-10 17:48 ` Alexander Viro
1999-10-10 18:42 ` Manfred Spraul
1999-10-10 19:03 ` Alexander Viro
1999-10-10 21:31 ` Manfred Spraul
1999-10-10 21:53 ` Andrea Arcangeli
1999-10-10 22:34 ` Alexander Viro
1999-10-10 23:28 ` Andrea Arcangeli
1999-10-11 15:50 ` Stephen C. Tweedie
1999-10-11 16:05 ` Alexander Viro
1999-10-11 18:02 ` Manfred Spraul
1999-10-11 19:07 ` Kanoj Sarcar
1999-10-11 22:23 ` Stephen C. Tweedie
1999-10-13 1:25 ` Kanoj Sarcar
1999-10-13 7:32 ` Manfred Spraul
1999-10-15 9:58 ` Ralf Baechle
1999-10-15 17:50 ` Kanoj Sarcar
1999-10-13 10:45 ` Stephen C. Tweedie
1999-10-11 20:15 ` Stephen C. Tweedie
1999-10-11 21:14 ` Manfred Spraul
1999-10-11 21:37 ` Alexander Viro
1999-10-11 22:13 ` Manfred Spraul
1999-10-11 22:22 ` Stephen C. Tweedie
1999-10-11 23:01 ` Alexander Viro
1999-10-12 14:06 ` [more fun] " Alexander Viro
1999-10-13 7:35 ` Manfred Spraul
1999-10-13 18:34 ` Kanoj Sarcar
1999-10-13 10:16 ` Stephen C. Tweedie
1999-10-11 20:13 ` Stephen C. Tweedie
1999-10-11 21:40 ` Alexander Viro
1999-10-11 22:20 ` Stephen C. Tweedie
1999-10-11 22:31 ` Alexander Viro
1999-10-13 10:25 ` Stephen C. Tweedie [this message]
1999-10-11 15:47 ` Stephen C. Tweedie
1999-10-11 15:43 ` Stephen C. Tweedie
1999-10-10 16:56 ` Andrea Arcangeli
1999-10-11 15:41 ` Stephen C. Tweedie
1999-10-11 15:52 ` Alexander Viro
1999-10-09 12:48 Manfred Spraul
1999-10-09 13:12 ` Alexander Viro
1999-10-09 13:17 ` Manfred Spraul
1999-10-09 13:38 ` Alexander Viro
1999-10-09 16:01 ` Andrea Arcangeli
1999-10-10 13:05 ` Manfred Spraul
1999-10-11 15:09 ` Stephen C. Tweedie
1999-10-11 15:05 ` Stephen C. Tweedie
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