From: Rasmus Andersen <rasmus@jaquet.dk>
To: David Howells <dhowells@cambridge.redhat.com>
Cc: Rik van Riel <riel@conectiva.com.br>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] guard mm->rss with page_table_lock (241p11)
Date: Tue, 30 Jan 2001 09:31:59 +0100 [thread overview]
Message-ID: <20010130093159.A3298@jaquet.dk> (raw)
In-Reply-To: <13240.980842736@warthog.cambridge.redhat.com>; from dhowells@cambridge.redhat.com on Tue, Jan 30, 2001 at 08:18:56AM +0000
On Tue, Jan 30, 2001 at 08:18:56AM +0000, David Howells wrote:
> >...
> > + spin_lock(&mm->page_table_lock);
> > mm->rss++;
> > + spin_unlock(&mm->page_table_lock);
> >...
>
> Would it not be better to use some sort of atomic add/subtract/clear operation
> rather than a spinlock? (Which would also give you fewer atomic memory access
> cycles).
This will unfortunately not do for all platforms. Please read
http://marc.theaimsgroup.com/?t=97630768100003&w=2&r=1 for the
last discussion of this.
Regards,
Rasmus
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next prev parent reply other threads:[~2001-01-30 8:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-29 21:23 Rasmus Andersen
2001-01-29 21:30 ` Rik van Riel
2001-01-29 21:43 ` Rasmus Andersen
2001-01-29 21:47 ` Rik van Riel
2001-01-30 8:18 ` David Howells
2001-01-30 8:31 ` Rasmus Andersen [this message]
2001-01-30 14:32 ` Mark Hahn
2001-01-30 15:30 ` Eric W. Biederman
2001-01-30 8:39 ` David S. Miller
2001-01-30 11:17 ` Chris Wedgwood
2001-01-30 11:23 ` Rik van Riel
2001-01-30 11:38 ` Rasmus Andersen
2001-02-13 3:15 ` george anzinger
2001-02-13 2:05 ` Marcelo Tosatti
2001-02-13 10:08 ` Stephen C. Tweedie
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