From: "Stephen C. Tweedie" <sct@redhat.com>
To: Andrea Arcangeli <andrea@e-mind.com>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Zlatko.Calusic@CARNet.hr, Linux-MM List <linux-mm@kvack.org>,
Andi Kleen <andi@zero.aec.at>
Subject: Re: Update shared mappings
Date: Thu, 3 Dec 1998 11:56:38 GMT [thread overview]
Message-ID: <199812031156.LAA03268@dax.scot.redhat.com> (raw)
In-Reply-To: <Pine.LNX.3.96.981202191811.4720A-100000@dragon.bogus>
Hi,
On Wed, 2 Dec 1998 19:32:56 +0100 (CET), Andrea Arcangeli
<andrea@e-mind.com> said:
> I have a question. Please consider only the UP case (as if linux would not
> support SMP at all). Is it possible that while we are running inside
> sys_msync() and another process has the mmap semaphore held?
No, because sys_msync() takes the mm semaphore first thing. Another
process _can_ hold the mm semaphore of a different vma on the same
region of the file, however.
> Stephen I read some emails about a PG_dirty flag. Could you tell me some
> more about that flag?
When it gets implemented it will have whatever semantics we choose to
give it. :)
--Stephen
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prev parent reply other threads:[~1998-12-03 11:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-11-20 4:10 Zlatko Calusic
1998-11-30 13:52 ` Stephen C. Tweedie
1998-11-30 15:19 ` Zlatko Calusic
1998-11-30 20:02 ` Andrea Arcangeli
1998-12-01 15:03 ` Stephen C. Tweedie
1998-12-01 17:48 ` Andrea Arcangeli
1998-12-02 16:21 ` Stephen C. Tweedie
1998-12-02 18:32 ` Andrea Arcangeli
1998-12-03 5:44 ` Eric W. Biederman
1998-12-03 11:56 ` Stephen C. Tweedie [this message]
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