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
Cc: linux-kernel@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Mel Gorman <mel@csn.ul.ie>, Nick Piggin <npiggin@suse.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 0/7] mm: preemptibility
Date: Fri, 02 Apr 2010 16:16:01 +0200 [thread overview]
Message-ID: <20100402141601.435955404@chello.nl> (raw)
Hi,
This (incomplete) patch-set makes part of the mm a lot more preemptible.
It converts i_mmap_lock and anon_vma->lock to mutexes.
On the way there it also makes mmu_gather 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 we 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 be wanted by
KSM as well as Mel's compaction work.
This patch set seems to build and boot on my x86_64 machine and even
builds a kernel. I'll work on getting PPC working again and audit other
architectures their mmu_gather implementation.
next reply other threads:[~2010-04-02 14:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-02 14:16 Peter Zijlstra [this message]
2010-04-02 14:16 ` [PATCH 1/7] mm: Move anon_vma ref out from under CONFIG_KSM Peter Zijlstra
2010-04-02 14:16 ` [PATCH 2/7] mm: Make use of the anon_vma ref count Peter Zijlstra
2010-04-02 14:16 ` [PATCH 3/7] mm: Preemptible mmu_gather Peter Zijlstra
2010-04-02 14:16 ` [PATCH 4/7] lockdep, mutex: Provide mutex_lock_nest_lock Peter Zijlstra
2010-04-02 14:16 ` [PATCH 5/7] mutex: Provide mutex_is_contended Peter Zijlstra
2010-04-02 14:16 ` [PATCH 6/7] mm: Convert i_mmap_lock and anon_vma->lock to mutexes Peter Zijlstra
2010-04-02 14:16 ` [PATCH 7/7] mm: Optimize page_lock_anon_vma Peter Zijlstra
2010-04-02 15:14 ` [PATCH 0/7] mm: preemptibility Andrea Arcangeli
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