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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!


  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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