From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, ak@suse.de,
Paul Mackerras <paulus@samba.org>
Subject: Re: [QUICKLIST 1/4] Quicklists for page table pages V5
Date: Tue, 10 Apr 2007 14:45:37 +1000 [thread overview]
Message-ID: <1176180337.8061.21.camel@localhost.localdomain> (raw)
In-Reply-To: <20070409182509.8559.33823.sendpatchset@schroedinger.engr.sgi.com>
On Mon, 2007-04-09 at 11:25 -0700, Christoph Lameter wrote:
> Quicklists for page table pages V5
Looks interesting, but unfortunately not very useful at this point for
powerpc unless you remove the assumption that quicklists contain
pages...
On powerpc, we currently use kmem cache slabs (though that isn't
terribly node friendly) whose sizes depend on the page size.
For a 4K page size kernel, we have 4 level page tables and use 2 caches,
PTE and PGD pages are 4K (thus are PAGE_SIZE'd), and PMD & PUD are 1K.
For a 64K page size kernel, we have 3 level page tables and we use 3
caches: a PGD pages are 128 bytes (yeah, not big heh...), our pmd
pages are 32K (half a page) and PTE pages are PAGE_SIZE (64K).
Cheers,
Ben.
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next prev parent reply other threads:[~2007-04-10 4:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-09 18:25 Christoph Lameter
2007-04-09 18:25 ` [QUICKLIST 2/4] Quicklist support for IA64 Christoph Lameter
2007-04-09 18:25 ` [QUICKLIST 3/4] Quicklist support for x86_64 Christoph Lameter
2007-04-09 18:43 ` Andi Kleen
2007-04-09 18:46 ` Christoph Lameter
2007-04-09 18:49 ` Andi Kleen
2007-04-09 18:51 ` Christoph Lameter
2007-04-09 18:53 ` Andi Kleen
2007-04-09 18:56 ` Christoph Lameter
2007-04-09 21:28 ` Andrew Morton
2007-04-09 22:01 ` Christoph Lameter
2007-04-09 18:25 ` [QUICKLIST 4/4] Quicklist support for sparc64 Christoph Lameter, David Miller
2007-04-09 18:48 ` [QUICKLIST 1/4] Quicklists for page table pages V5 Andrew Morton
2007-04-09 18:50 ` Christoph Lameter
2007-04-09 21:27 ` Andrew Morton
2007-04-09 21:41 ` Andrew Morton
2007-04-09 22:03 ` Christoph Lameter
2007-04-10 0:26 ` William Lee Irwin III
2007-04-10 0:53 ` Christoph Lameter
2007-04-10 4:45 ` Benjamin Herrenschmidt [this message]
2007-04-11 4:04 ` Christoph Lameter
2007-04-11 4:18 ` Benjamin Herrenschmidt
2007-04-11 5:41 ` Paul Mackerras
2007-04-11 6:15 ` Benjamin Herrenschmidt
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