From: cl@linux.com (Christoph Lameter)
Subject: [ltt-dev] [PATCH] Fix dirty page accounting in redirty_page_for_writepage()
Date: Thu, 30 Apr 2009 11:44:54 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0904301142140.4028@qirst.com> (raw)
In-Reply-To: <20090430154255.GA3714@elte.hu>
On Thu, 30 Apr 2009, Ingo Molnar wrote:
> nice. Do these all get called with irqs off, all the time?
In most cases yes. The VMstat patch includes an example were we may not
care too much about a event counter missing a beat once in a while for
platforms not supporting atomic per cpu ops. I know this affects IA64. The
cost of an atomic operations for an event counter update (which would have
avoided the potential of a concurrent update) was not justifiable.
next prev parent reply other threads:[~2009-04-30 15:44 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-29 23:25 Mathieu Desnoyers
2009-04-29 23:56 ` Mathieu Desnoyers
2009-04-29 23:59 ` Andrew Morton
2009-04-30 2:34 ` Mathieu Desnoyers
2009-04-30 0:06 ` Linus Torvalds
2009-04-30 2:43 ` Mathieu Desnoyers
2009-04-30 6:21 ` Ingo Molnar
2009-04-30 6:33 ` Mathieu Desnoyers
2009-04-30 6:50 ` Ingo Molnar
2009-04-30 13:38 ` Christoph Lameter
2009-04-30 14:10 ` Ingo Molnar
2009-04-30 14:12 ` Mathieu Desnoyers
2009-04-30 14:12 ` Christoph Lameter
2009-04-30 19:41 ` Mathieu Desnoyers
2009-04-30 20:17 ` Christoph Lameter
2009-04-30 21:17 ` Mathieu Desnoyers
2009-04-30 13:22 ` Christoph Lameter
2009-04-30 13:38 ` Ingo Molnar
2009-04-30 13:40 ` Christoph Lameter
2009-04-30 14:14 ` Ingo Molnar
2009-04-30 14:15 ` Christoph Lameter
2009-04-30 14:38 ` Ingo Molnar
2009-04-30 14:45 ` Christoph Lameter
2009-04-30 15:01 ` Ingo Molnar
2009-04-30 15:25 ` Christoph Lameter
2009-04-30 15:42 ` Ingo Molnar
2009-04-30 15:44 ` Christoph Lameter [this message]
2009-04-30 16:06 ` Ingo Molnar
2009-04-30 16:11 ` Christoph Lameter
2009-04-30 16:16 ` Linus Torvalds
2009-04-30 17:23 ` Ingo Molnar
2009-04-30 18:07 ` Christoph Lameter
2009-04-30 16:13 ` Linus Torvalds
2009-04-30 15:54 ` Ingo Molnar
2009-04-30 16:00 ` Ingo Molnar
2009-04-30 16:08 ` Christoph Lameter
2009-04-30 13:50 ` Mathieu Desnoyers
2009-04-30 13:55 ` Christoph Lameter
2009-04-30 14:32 ` Ingo Molnar
2009-04-30 14:42 ` Christoph Lameter
2009-04-30 14:59 ` Ingo Molnar
2009-04-30 16:03 ` Mathieu Desnoyers
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