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From: Alan Cox
Subject:
Date: Tuesday, April 6, 2010 - 9:53 am

> That works for the uncontended case.  For the contended case, the waiter 

If you insist on doing it that way yes, but knowing the lock owner is
likely to be away for a while also lets you do things like punt work
either by picking another work package in the meantime, or by queueing
the work you can't do on a list the pre-empted lock owner will review
before dropping the lock.

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[PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional adapti ..., Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 1/6] futex: replace fshared and clockrt with combin ..., Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 2/6] futex: add futex_q static initializer, Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 3/6] futex: refactor futex_lock_pi_atomic, Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 4/6] futex: Add FUTEX_LOCK with optional adaptive s ..., Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 5/6] futex: handle timeout inside adaptive lock spin, Darren Hart, (Mon Apr 5, 1:23 pm)
[PATCH 6/6] futex: Add aggressive adaptive spinning argume ..., Darren Hart, (Mon Apr 5, 1:23 pm)
Re: [PATCH V2^W V4 0/6][RFC] futex: FUTEX_LOCK with option ..., Darren Hart, (Mon Apr 5, 1:48 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Mon Apr 5, 2:15 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Mon Apr 5, 2:54 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Mon Apr 5, 3:21 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Mon Apr 5, 3:59 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Mon Apr 5, 4:15 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Chris Wright, (Mon Apr 5, 4:29 pm)
Re: [PATCH 5/6] futex: handle timeout inside adaptive lock ..., Thomas Gleixner, (Tue Apr 6, 1:27 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Peter Zijlstra, (Tue Apr 6, 1:48 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Tue Apr 6, 6:28 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Tue Apr 6, 6:30 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Peter Zijlstra, (Tue Apr 6, 6:35 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Tue Apr 6, 6:41 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Alan Cox, (Tue Apr 6, 6:51 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Peter Zijlstra, (Tue Apr 6, 7:09 am)
[No subject], Ulrich Drepper, (Tue Apr 6, 7:47 am)
[No subject], Peter Zijlstra, (Tue Apr 6, 7:51 am)
[No subject], Darren Hart, (Tue Apr 6, 8:28 am)
[No subject], Peter Zijlstra, (Tue Apr 6, 8:29 am)
[No subject], Darren Hart, (Tue Apr 6, 8:33 am)
[No subject], Peter Zijlstra, (Tue Apr 6, 8:37 am)
[No subject], Avi Kivity, (Tue Apr 6, 9:06 am)
[No subject], Avi Kivity, (Tue Apr 6, 9:10 am)
[No subject], Thomas Gleixner, (Tue Apr 6, 9:14 am)
[No subject], Avi Kivity, (Tue Apr 6, 9:20 am)
[No subject], Alan Cox, (Tue Apr 6, 9:44 am)
[No subject], Alan Cox, (Tue Apr 6, 9:53 am)
[No subject], Alan Cox, (Tue Apr 6, 9:54 am)
[No subject], Thomas Gleixner, (Tue Apr 6, 9:55 am)
[No subject], Ulrich Drepper, (Tue Apr 6, 10:34 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Thomas Gleixner, (Tue Apr 6, 11:15 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Thomas Gleixner, (Tue Apr 6, 12:31 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Ulrich Drepper, (Tue Apr 6, 1:02 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Tue Apr 6, 2:22 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Thomas Gleixner, (Tue Apr 6, 4:16 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Tue Apr 6, 4:36 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Avi Kivity, (Tue Apr 6, 10:33 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., john cooper, (Tue Apr 6, 11:18 pm)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Wed Apr 7, 10:26 am)
Re: [PATCH 5/6] futex: handle timeout inside adaptive lock ..., Darren Hart, (Wed Apr 7, 10:31 am)
Re: [PATCH 5/6] futex: handle timeout inside adaptive lock ..., Gregory Haskins, (Wed Apr 7, 11:44 am)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Thomas Gleixner, (Wed Apr 7, 12:59 pm)
Re: [PATCH 5/6] futex: handle timeout inside adaptive lock ..., Darren Hart, (Wed Apr 7, 4:15 pm)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Wed Apr 7, 8:25 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Darren Hart, (Wed Apr 7, 8:33 pm)
Re: [PATCH 6/6] futex: Add aggressive adaptive spinning ar ..., Darren Hart, (Wed Apr 7, 10:58 pm)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Peter W. Morreale, (Thu Apr 8, 4:10 pm)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Thu Apr 8, 10:41 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., john cooper, (Thu Apr 8, 10:52 pm)
Re: [PATCH 4/6] futex: Add FUTEX_LOCK with optional adapti ..., Peter W. Morreale, (Fri Apr 9, 6:13 am)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Alan Cox, (Sat Apr 10, 4:35 pm)
Re: [PATCH V2 0/6][RFC] futex: FUTEX_LOCK with optional ad ..., Ulrich Drepper, (Sat Apr 10, 4:53 pm)