linux-kernel - Re: [PATCH 6/6] futex: fix miss ordered wakeups

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Date:	Wed, 25 Jun 2008 07:29:27 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 6/6] futex: fix miss ordered wakeups

On Tue, 2008-06-24 at 16:20 -0700, Daniel Walker wrote:
> plain text document attachment (blocked_on-futex.patch)
> Adds an additional function call to the sched_setscheduler to update the
> waiter position of a task if it happens to be waiting on a futex. This
> ensures that the kernel level waiter ordering is correctly maintained
> based on the changed priority of the task.
> 
> I fixed the locking issue noticed by Thomas Gleixner.
> 
> This doesn't address userspace at all, only the kernel level wakeups and
> kernel level ordering.
> 
> The additional locking added to the futex_wait function has no visible speed
> impact, and only effects waiters which actual enter the kernel.


Daniel, I'm not sure what to think,.. you were told how broken this
approach was, you were told to give proper justification for this
change. You did neither and just reposted the same old broken shite
again.

Wake up.

(Just in case you missed it, that's a NAK)

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