From: Ingo Molnar <mingo@elte.hu>
To: Christoph Hellwig <hch@infradead.org>,
Christoph Lameter <clameter@engr.sgi.com>,
Andrew Morton <akpm@osdl.org>,
hugh@veritas.com, linux-kernel@vger.kernel.org,
torvalds@osdl.org
Subject: Re: [PATCH 01/15] mm: poison struct page for ptlock
Date: Fri, 11 Nov 2005 11:46:16 +0100 [thread overview]
Message-ID: <20051111104616.GA24238@elte.hu> (raw)
In-Reply-To: <20051110215255.GA25712@infradead.org>
* Christoph Hellwig <hch@infradead.org> wrote:
> On Thu, Nov 10, 2005 at 01:37:19PM -0800, Christoph Lameter wrote:
> > On Thu, 10 Nov 2005, Andrew Morton wrote:
> >
> > > spinlock in struct page, and the size of the spinlock varies a lot according
> > > to config. The only >wordsize version we really care about is
> > > CONFIG_PREEMPT, NR_CPUS >= 4. (which distros don't ship...)
> >
> > Suse, Debian and Redhat ship such kernels.
>
> No. SuSE and Redhat have always been smart enough to avoid
> CONFIG_PREEMPT like the plague, and even Debian finally noticed this a
> few month ago.
while you are right about CONFIG_PREEMPT, there is some movement in this
area: CONFIG_PREEMPT_VOLUNTARY is now turned on in Fedora kernels, and
PREEMPT_BKL is turned on for SMP kernels.
Ingo
next prev parent reply other threads:[~2005-11-11 10:46 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-10 1:42 [PATCH 00/15] mm: struct page lock and counts Hugh Dickins
2005-11-10 1:43 ` [PATCH 01/15] mm: poison struct page for ptlock Hugh Dickins
2005-11-10 2:10 ` Andrew Morton
2005-11-10 2:22 ` Hugh Dickins
2005-11-10 2:56 ` Andrew Morton
2005-11-10 2:58 ` Andrew Morton
2005-11-10 11:28 ` Ingo Molnar
2005-11-10 12:06 ` Ingo Molnar
2005-11-10 12:26 ` Andrew Morton
2005-11-10 21:37 ` Christoph Lameter
2005-11-10 21:52 ` Christoph Hellwig
2005-11-11 10:46 ` Ingo Molnar [this message]
2005-11-12 23:48 ` Adrian Bunk
2005-11-10 12:35 ` Hugh Dickins
2005-11-10 12:51 ` Andrew Morton
2005-11-10 13:29 ` Hugh Dickins
2005-11-10 15:00 ` Ingo Molnar
2005-11-10 15:38 ` Hugh Dickins
2005-11-10 19:49 ` Andrew Morton
2005-11-10 19:56 ` Linus Torvalds
2005-11-11 0:10 ` Russell King
2005-11-12 6:27 ` Benjamin Herrenschmidt
2005-11-11 15:02 ` Hugh Dickins
2005-11-15 18:49 ` Andrew Morton
2005-11-15 19:51 ` Hugh Dickins
2005-11-15 20:05 ` Andrew Morton
2005-11-10 1:44 ` [PATCH 02/15] mm: revert page_private Hugh Dickins
2005-11-10 1:46 ` [PATCH 03/15] mm reiser4: " Hugh Dickins
2005-11-10 1:47 ` [PATCH 04/15] mm: update split ptlock Kconfig Hugh Dickins
2005-11-10 1:48 ` [PATCH 05/15] mm: unbloat get_futex_key Hugh Dickins
2005-11-10 1:50 ` [PATCH 06/15] mm: remove ppc highpte Hugh Dickins
2005-11-10 1:52 ` Benjamin Herrenschmidt
2005-11-10 1:55 ` Paul Mackerras
2005-11-10 2:46 ` Hugh Dickins
2005-11-10 1:51 ` [PATCH 07/15] mm: powerpc ptlock comments Hugh Dickins
2005-11-10 1:53 ` [PATCH 08/15] mm: powerpc init_mm without ptlock Hugh Dickins
2005-11-10 1:56 ` [PATCH 09/15] mm: fill arch atomic64 gaps Hugh Dickins
2005-11-10 13:38 ` Andi Kleen
2005-11-10 15:19 ` Hugh Dickins
2005-11-10 1:57 ` [PATCH 10/15] mm: atomic64 page counts Hugh Dickins
2005-11-10 2:16 ` Andrew Morton
2005-11-10 2:33 ` Hugh Dickins
2005-11-10 3:01 ` Andrew Morton
2005-11-10 21:43 ` Christoph Lameter
2005-11-10 21:53 ` Andrew Morton
2005-11-11 15:25 ` Hugh Dickins
2005-11-11 18:03 ` Christoph Lameter
2005-11-10 2:00 ` [PATCH 11/15] mm: long " Hugh Dickins
2005-11-10 2:01 ` [PATCH 12/15] mm reiser4: " Hugh Dickins
2005-11-10 2:03 ` [PATCH 13/15] mm: get_user_pages check count Hugh Dickins
2005-11-10 2:08 ` [PATCH 14/15] mm: inc_page_table_pages check max Hugh Dickins
2005-11-10 2:09 ` [PATCH 15/15] mm: remove install_page limit Hugh Dickins
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