From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: lkml <linux-kernel@vger.kernel.org>,
linux-arch@vger.kernel.org, Zach Brown <zach.brown@oracle.com>,
Ingo Molnar <mingo@elte.hu>,
akpm@linux-foundation.org
Subject: Re: [PATCH 05/12] mm: trylock_page
Date: Fri, 28 Sep 2007 13:11:37 +1000 [thread overview]
Message-ID: <200709281311.37616.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <20070928080041.891125000@chello.nl>
On Friday 28 September 2007 17:42, Peter Zijlstra wrote:
> Replace raw TestSetPageLocked() usage with trylock_page()
I have such a thing queued too, for the lock bitops patches for when 2.6.24
opens, Andrew promises me :).
I guess they should be identical, except I don't like doing trylock_page in
place of SetPageLocked, for memory ordering performance and aesthetic
reasons... I've got an init_page_locked (or set_page_locked... I can't
remember, the patch is at home).
Fine idea to lockdep the page lock, anyway. Does it show up any of the
buffered write deadlock possibilities? :)
buffer lock is another notable bit-mutex that might be converted (I have
the patch to do the similar nice !tas->trylock conversion for that too). I
think it is used widely enough by tricky code that it would be useful to
annotate as well.
Unfortunately we can't convert bit_spinlock.h easily, I guess?
next prev parent reply other threads:[~2007-09-28 19:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-28 7:42 [PATCH 00/12] various lockdep patches Peter Zijlstra
2007-09-28 7:42 ` [PATCH 01/12] lockdep: syscall exit check Peter Zijlstra
2007-09-28 12:03 ` Heiko Carstens
2007-09-28 12:14 ` Peter Zijlstra
2007-09-28 12:21 ` Heiko Carstens
2007-09-28 7:42 ` [PATCH 02/12] lockdep: i386: connect the sysexit hook Peter Zijlstra
2007-09-28 7:42 ` [PATCH 03/12] lockdep: x86_64: " Peter Zijlstra
2007-09-28 7:42 ` [PATCH 04/12] lockdep: annotate journal_start() Peter Zijlstra
2007-09-28 7:42 ` [PATCH 05/12] mm: trylock_page Peter Zijlstra
2007-09-28 3:11 ` Nick Piggin [this message]
2007-09-29 15:01 ` Peter Zijlstra
2007-10-02 8:44 ` Nick Piggin
2007-09-28 7:42 ` [PATCH 06/12] mm: remove raw SetPageLocked() usage Peter Zijlstra
2007-09-28 8:22 ` Christoph Hellwig
2007-09-28 7:42 ` [PATCH 07/12] lockdep: page lock hooks Peter Zijlstra
2007-09-28 7:42 ` [PATCH 08/12] lockdep: increase MAX_LOCK_DEPTH Peter Zijlstra
2007-09-28 7:42 ` [PATCH 09/12] lockdep: add a page lock class per filesystem type Peter Zijlstra
2007-09-28 7:42 ` [PATCH 10/12] lockdep: lock_page: handle IO-completions Peter Zijlstra
2007-09-28 7:42 ` [PATCH 11/12] mm: set_page_mapping() Peter Zijlstra
2007-09-28 7:42 ` [PATCH 12/12] lockdep: enable lock_page lockdep annotation Peter Zijlstra
2007-09-28 11:49 ` [PATCH 00/12] various lockdep patches Heiko Carstens
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