Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adaptive spinning | KernelTrap

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adaptive spinning

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From: Thomas Gleixner

Subject: Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adaptive spinning

Date: Friday, May 7, 2010 - 9:30 am

On Fri, 7 May 2010, Peter Zijlstra wrote:

quoted text> On Fri, 2010-05-07 at 18:20 +0200, Thomas Gleixner wrote:
> > +               if (!owner->oncpu)
> 
> can't do that, that relies on __ARCH_WANT_UNLOCKED_CTXSW

Grr, yes.
 
quoted text> Please keep the code as near mutex_spin_on_owner() as possible.

There is no reason why we can't make that unconditional.

Thanks,

	tglx
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Messages in current thread:

[PATCH V6 0/4][RFC] futex: FUTEX_LOCK with optional adapti ..., Darren Hart, (Wed May 5, 11:24 pm)

[PATCH 1/4] futex: replace fshared and clockrt with combin ..., Darren Hart, (Wed May 5, 11:24 pm)

[PATCH 2/4] futex: add futex_q static initializer, Darren Hart, (Wed May 5, 11:24 pm)

[PATCH 3/4] futex: refactor futex_lock_pi_atomic, Darren Hart, (Wed May 5, 11:24 pm)

[PATCH 4/4] futex: Add FUTEX_LOCK with optional adaptive s ..., Darren Hart, (Wed May 5, 11:24 pm)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Thomas Gleixner, (Fri May 7, 9:20 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Peter Zijlstra, (Fri May 7, 9:24 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Thomas Gleixner, (Fri May 7, 9:30 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Peter Zijlstra, (Fri May 7, 9:35 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Thomas Gleixner, (Fri May 7, 9:43 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Fri May 7, 9:52 am)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Fri May 7, 12:05 pm)

Re: [PATCH 4/4] futex: Add FUTEX_LOCK with optional adapti ..., Darren Hart, (Fri May 7, 12:11 pm)