From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: 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-fou
Cc: 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@kernel.dk>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Yanmin Zhang <yanmin_zhang@linux.intel.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: [PATCH 00/20] mm: Preemptibility -v5
Date: Mon, 18 Oct 2010 13:24:33 +0200 [thread overview]
Message-ID: <20101018112433.556591568@chello.nl> (raw)
This patch-set makes part of the mm a lot more preemptible. It converts
i_mmap_lock and anon_vma->lock to mutexes and makes mmu_gather fully
preemptible.
The main motivation was making mm_take_all_locks() preemptible, since it
appears people are nesting hundreds of spinlocks there.
The side-effects are that can finally make mmu_gather preemptible,
something which lots of people have wanted to do for a long time.
It also gets us anon_vma refcounting, which seems to result in a nice
cleanup of the anon_vma lifetime rules wrt KSM and compaction.
This patch-set it build and boot-tested on x86_64 (a previous version was
also tested on Dave's Niagra2 machines, and I suppose s390 was too when
Martin provided the conversion patch for his arch).
There are no known architectures left unconverted.
Yanmin ran the -v3 posting through the comprehensive Intel test farm
and didn't find any regressions.
( Not included in this posting are the 4 Sparc64 patches that implement
gup_fast, those can be applied separately after this series gets
anywhere. )
The full series (including the Sparc64 gup_fast bits) also available in -git
form from (against Linus' tree as of about an hour ago):
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-mmu_preempt.git mmu_preempt
DaveM mentioned some sparc64 trouble with the -v4 posting, this turned out to
be a false positive as unpatched kernels also are having trouble on his
machines.
Linus, Andrew, Stephen, can we add this to -next for .37?
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: 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>
Cc: 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@kernel.dk>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Yanmin Zhang <yanmin_zhang@linux.intel.com>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: [PATCH 00/20] mm: Preemptibility -v5
Date: Mon, 18 Oct 2010 13:24:33 +0200 [thread overview]
Message-ID: <20101018112433.556591568@chello.nl> (raw)
Message-ID: <20101018112433.3BqUYCAjWsfmWEQYgEwACZthuk_c0aPLWud5HvaRP3E@z> (raw)
This patch-set makes part of the mm a lot more preemptible. It converts
i_mmap_lock and anon_vma->lock to mutexes and makes mmu_gather fully
preemptible.
The main motivation was making mm_take_all_locks() preemptible, since it
appears people are nesting hundreds of spinlocks there.
The side-effects are that can finally make mmu_gather preemptible,
something which lots of people have wanted to do for a long time.
It also gets us anon_vma refcounting, which seems to result in a nice
cleanup of the anon_vma lifetime rules wrt KSM and compaction.
This patch-set it build and boot-tested on x86_64 (a previous version was
also tested on Dave's Niagra2 machines, and I suppose s390 was too when
Martin provided the conversion patch for his arch).
There are no known architectures left unconverted.
Yanmin ran the -v3 posting through the comprehensive Intel test farm
and didn't find any regressions.
( Not included in this posting are the 4 Sparc64 patches that implement
gup_fast, those can be applied separately after this series gets
anywhere. )
The full series (including the Sparc64 gup_fast bits) also available in -git
form from (against Linus' tree as of about an hour ago):
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-mmu_preempt.git mmu_preempt
DaveM mentioned some sparc64 trouble with the -v4 posting, this turned out to
be a false positive as unpatched kernels also are having trouble on his
machines.
Linus, Andrew, Stephen, can we add this to -next for .37?
next reply other threads:[~2010-10-18 11:24 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-18 11:24 Peter Zijlstra [this message]
2010-10-18 11:24 ` [PATCH 00/20] mm: Preemptibility -v5 Peter Zijlstra
2010-10-18 11:24 ` [PATCH 01/20] powerpc: Use call_rcu_sched() for pagetables Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 02/20] mm: Improve page_lock_anon_vma() comment Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 03/20] mm: Rename drop_anon_vma to put_anon_vma Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 04/20] mm: Move anon_vma ref out from under CONFIG_KSM Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 05/20] mm: Simplify anon_vma refcounts Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 06/20] mm: Use refcounts for page_lock_anon_vma() Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 07/20] mm: Preemptible mmu_gather Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 08/20] powerpc: " Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 09/20] sparc: " Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 10/20] s390: preemptible mmu_gather Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 11/20] arm: Preemptible mmu_gather Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 12/20] sh: " Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 13/20] um: " Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 14/20] ia64: " Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 15/20] mm, powerpc: Move the RCU page-table freeing into generic code Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 16/20] lockdep, mutex: Provide mutex_lock_nest_lock Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 17/20] mutex: Provide mutex_is_contended Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 18/20] mm: Convert i_mmap_lock and anon_vma->lock to mutexes Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 19/20] mm: Extended batches for generic mmu_gather Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 11:24 ` [PATCH 20/20] mm: Optimize page_lock_anon_vma() fast-path Peter Zijlstra
2010-10-18 11:24 ` Peter Zijlstra
2010-10-18 14:55 ` [PATCH 00/20] mm: Preemptibility -v5 Stephen Rothwell
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=20101018112433.556591568@chello.nl \
--to=a.p.zijlstra@chello.nl \
--cc=aarcange@redhat.com \
--cc=akpm@linux-fou \
--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@kernel.dk \
--cc=paulmck@linux.vnet.ibm.com \
--cc=riel@redhat.com \
--cc=sfr@canb.auug.org.au \
--cc=tglx@linutronix.de \
--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).