From: Pekka Enberg <penberg@kernel.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Avi Kivity <avi@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
Rik van Riel <riel@redhat.com>, Ingo Molnar <mingo@elte.hu>,
akpm@linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
David Miller <davem@davemloft.net>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Mel Gorman <mel@csn.ul.ie>, Nick Piggin <npiggin@suse.de>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Yanmin Zhang <yanmin_zhang@linux.intel.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH 05/20] mm: Simplify anon_vma refcounts
Date: Sat, 28 Aug 2010 18:13:13 +0300 [thread overview]
Message-ID: <AANLkTi=-TsSNrv8woU7Ko7QmSPWhBnQAypBvt01Z+9i5@mail.gmail.com> (raw)
In-Reply-To: <20100828142455.742059699@chello.nl>
On Sat, Aug 28, 2010 at 5:16 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> This patch changes the anon_vma refcount to be 0 when the object is
> free. It does this by adding 1 ref to being in use in the anon_vma
> structure (iow. the anon_vma->head list is not empty).
>
> This allows a simpler release scheme without having to check both the
> refcount and the list as well as avoids taking a ref for each entry
> on the list.
>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
FWIW,
Acked-by: Pekka Enberg <penberg@kernel.org>
next prev parent reply other threads:[~2010-08-28 15:13 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-28 14:16 [PATCH 00/20] mm: Preemptibility -v4 Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 01/20] powerpc: Use call_rcu_sched() for pagetables Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-31 6:10 ` Benjamin Herrenschmidt
2010-08-28 14:16 ` [PATCH 02/20] mm: Improve page_lock_anon_vma() comment Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 03/20] mm: Rename drop_anon_vma to put_anon_vma Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 15:08 ` Pekka Enberg
2010-08-28 14:16 ` [PATCH 04/20] mm: Move anon_vma ref out from under CONFIG_KSM Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 05/20] mm: Simplify anon_vma refcounts Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 15:13 ` Pekka Enberg [this message]
2010-08-28 14:16 ` [PATCH 06/20] mm: Use refcounts for page_lock_anon_vma() Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 07/20] mm: Preemptible mmu_gather Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 08/20] powerpc: " Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-31 6:26 ` Benjamin Herrenschmidt
2010-08-31 6:31 ` Benjamin Herrenschmidt
2010-08-31 6:31 ` Benjamin Herrenschmidt
2010-08-31 9:14 ` Peter Zijlstra
2010-08-31 9:14 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 09/20] sparc: " Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 10/20] s390: preemptible mmu_gather Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 11/20] arm: Preemptible mmu_gather Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 12/20] sh: " Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 13/20] um: " Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 14/20] ia64: " Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-30 15:44 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 15/20] mm, powerpc: Move the RCU page-table freeing into generic code Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 16/20] lockdep, mutex: Provide mutex_lock_nest_lock Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 17/20] mutex: Provide mutex_is_contended Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 18/20] mm: Convert i_mmap_lock and anon_vma->lock to mutexes Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 19/20] mm: Extended batches for generic mmu_gather Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:16 ` [PATCH 20/20] mm: Optimize page_lock_anon_vma() fast-path Peter Zijlstra
2010-08-28 14:16 ` Peter Zijlstra
2010-08-28 14:32 ` [PATCH 00/20] mm: Preemptibility -v4 Peter Zijlstra
2010-08-28 22:28 ` David Miller
2010-08-28 22:41 ` Peter Zijlstra
2010-08-28 14:56 ` Piotr Hosowicz
2010-08-28 15:10 ` Peter Zijlstra
2010-08-28 15:17 ` Piotr Hosowicz
2010-08-28 15:23 ` Peter Zijlstra
2010-08-28 16:01 ` Piotr Hosowicz
2010-08-29 12:46 ` Piotr Hosowicz
2010-08-29 12:46 ` Piotr Hosowicz
2010-08-29 13:37 ` Peter Zijlstra
2010-08-29 13:43 ` Piotr Hosowicz
2010-08-31 14:02 ` Piotr Hosowicz
2010-08-31 14:14 ` Piotr Hosowicz
2010-09-02 14:53 ` Piotr Hosowicz
2010-08-28 15:19 ` Pekka Enberg
2010-08-28 15:27 ` Peter Zijlstra
2010-08-28 15:27 ` Peter Zijlstra
[not found] ` <AANLkTikSm2Mq8hGNac9rpFH-3pvryw2kW57EP45Ny6Vp@mail.gmail.com>
2010-09-14 5:36 ` Alex,Shi
2010-09-14 7:42 ` Peter Zijlstra
2010-09-14 7:42 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2010-10-18 11:24 [PATCH 00/20] mm: Preemptibility -v5 Peter Zijlstra
2010-10-18 11:24 ` [PATCH 05/20] mm: Simplify anon_vma refcounts Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='AANLkTi=-TsSNrv8woU7Ko7QmSPWhBnQAypBvt01Z+9i5@mail.gmail.com' \
--to=penberg@kernel.org \
--cc=a.p.zijlstra@chello.nl \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=avi@redhat.com \
--cc=benh@kernel.crashing.org \
--cc=davem@davemloft.net \
--cc=hugh.dickins@tiscali.co.uk \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mel@csn.ul.ie \
--cc=mingo@elte.hu \
--cc=npiggin@suse.de \
--cc=paulmck@linux.vnet.ibm.com \
--cc=riel@redhat.com \
--cc=sfr@canb.auug.org.au \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=yanmin_zhang@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).