From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-kernel@vger.kernel.org, Hugh Dickins <hugh@veritas.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
linux-mm@kvack.org, Andi Kleen <ak@suse.de>
Subject: Re: [RFC 3/6] Make nr_pagecache a per zone counter
Date: Sun, 11 Dec 2005 16:32:41 -0200 [thread overview]
Message-ID: <20051211183241.GD4267@dmt.cnet> (raw)
In-Reply-To: <20051210005456.3887.94412.sendpatchset@schroedinger.engr.sgi.com>
On Fri, Dec 09, 2005 at 04:54:56PM -0800, Christoph Lameter wrote:
> Make nr_pagecache a per node variable
>
> Currently a single atomic variable is used to establish the size of the page cache
> in the whole machine. The zoned VM counters have the same method of implementation
> as the nr_pagecache code. Remove the special implementation for nr_pagecache and make
> it a zoned counter. We will then be able to figure out how much of the memory in a
> zone is used by the pagecache.
>
> Updates of the page cache counters are always performed with interrupts off.
> We can therefore use the __ variant here.
By the way, why does nr_pagecache needs to be an atomic variable on UP systems?
#ifdef CONFIG_SMP
...
#else
static inline void pagecache_acct(int count)
{
atomic_add(count, &nr_pagecache);
}
#endif
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next prev parent reply other threads:[~2005-12-11 18:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-10 0:54 [RFC 0/6] Zoned VM stats Christoph Lameter
2005-12-10 0:54 ` [RFC 1/6] Framework Christoph Lameter
2005-12-10 3:32 ` Andi Kleen
2005-12-12 16:32 ` Christoph Lameter
2005-12-12 3:46 ` Nick Piggin
2005-12-12 3:56 ` Andi Kleen
2005-12-12 4:14 ` Nick Piggin
2005-12-12 4:21 ` Andi Kleen
2005-12-12 4:28 ` Nick Piggin
2005-12-12 4:51 ` Andi Kleen
2005-12-12 7:05 ` Nick Piggin
2005-12-10 0:54 ` [RFC 2/6] Make nr_mapped a per zone counter Christoph Lameter
2005-12-10 0:54 ` [RFC 3/6] Make nr_pagecache " Christoph Lameter
2005-12-11 18:32 ` Marcelo Tosatti [this message]
2005-12-11 19:48 ` Andi Kleen
2005-12-11 20:49 ` Marcelo Tosatti
2005-12-12 3:51 ` Nick Piggin
2005-12-12 11:57 ` Marcelo Tosatti
2005-12-12 16:34 ` Christoph Lameter
2005-12-10 0:55 ` [RFC 4/6] Expanded node and zone statistics Christoph Lameter
2005-12-10 0:55 ` [RFC 5/6] Make nr_slab a per zone counter Christoph Lameter
2005-12-10 0:55 ` [RFC 6/6] Make nr_pagecache " Christoph Lameter
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