From: Peter Zijlstra <peterz@infradead.org>
To: Darren Hart <dvhltc@us.ibm.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH 6/6] futex: cleanup fault logic
Date: Thu, 12 Mar 2009 11:15:22 +0100 [thread overview]
Message-ID: <1236852922.5090.121.camel@laptop> (raw)
In-Reply-To: <20090312075612.9856.48612.stgit@Aeon>
On Thu, 2009-03-12 at 00:56 -0700, Darren Hart wrote:
> Older versions of the futex code held the mmap_sem which had to be
> dropped in order to call get_user(), so a two-pronged fault handling
> mechanism was employed to handle faults of the atomic operations. The
> mmap_sem is no longer held, so get_user() should be adequate. This patch
> greatly simplifies the logic and improves legibility.
Thanks!
next prev parent reply other threads:[~2009-03-12 10:15 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-12 7:55 [PATCH 0/6] Futex fixes and cleanups Darren Hart
2009-03-12 7:55 ` [PATCH 1/6] Update futex commentary Darren Hart
2009-03-12 10:24 ` [tip:core/futexes] futex: update " Darren Hart
2009-03-12 7:55 ` [PATCH 2/6] Additional (get|put)_futex_key() fixes Darren Hart
2009-03-12 10:16 ` Ingo Molnar
2009-03-12 13:42 ` Thomas Gleixner
2009-03-12 23:22 ` Darren Hart
2009-03-12 10:24 ` [tip:core/futexes] futex: additional " Darren Hart
2009-03-13 0:20 ` Ingo Molnar
2009-03-13 5:46 ` Darren Hart
2009-03-13 0:24 ` [tip:core/urgent] " Darren Hart
2009-03-12 7:55 ` [PATCH 3/6] futex: add double_unlock_hb() Darren Hart
2009-03-12 10:07 ` Peter Zijlstra
2009-03-12 10:10 ` Ingo Molnar
2009-03-12 10:58 ` Thomas Gleixner
2009-03-12 15:13 ` Darren Hart
2009-03-12 10:24 ` [tip:core/futexes] " Darren Hart
2009-03-12 7:55 ` [PATCH 4/6] futex: Use current->time_slack_ns for rt tasks too Darren Hart
2009-03-12 10:11 ` Peter Zijlstra
2009-03-12 10:24 ` [tip:core/futexes] futex: use " Darren Hart
2009-03-12 13:53 ` Arjan van de Ven
2009-03-12 14:02 ` Peter Zijlstra
2009-03-12 14:25 ` Thomas Gleixner
2009-03-12 14:48 ` Peter Zijlstra
2009-03-12 15:01 ` Arjan van de Ven
2009-03-12 21:33 ` Darren Hart
2009-03-12 21:43 ` Thomas Gleixner
2009-03-12 21:29 ` Darren Hart
2009-03-12 7:56 ` [PATCH 5/6] futex: unlock before returning -EFAULT Darren Hart
2009-03-12 10:13 ` Peter Zijlstra
2009-03-12 10:47 ` Thomas Gleixner
2009-03-12 11:06 ` Peter Zijlstra
2009-03-12 15:15 ` Darren Hart
2009-03-12 22:17 ` Darren Hart
2009-03-12 10:24 ` [tip:core/futexes] " Darren Hart
2009-03-13 0:24 ` [tip:core/urgent] " Darren Hart
2009-03-12 7:56 ` [PATCH 6/6] futex: cleanup fault logic Darren Hart
2009-03-12 10:15 ` Peter Zijlstra [this message]
2009-03-12 15:09 ` Darren Hart
2009-03-12 10:25 ` [tip:core/futexes] futex: clean up " Darren Hart
2009-03-12 12:22 ` [PATCH 0/6] Futex fixes and cleanups Ingo Molnar
2009-03-12 15:21 ` Darren Hart
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