Messages in this thread | | | Date | Sun, 16 Jun 2002 17:19:34 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [PATCH] 2.4-ac: sparc64 support for O(1) scheduler |
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On 14 Jun 2002, Robert Love wrote:
> > Ummm what is with all of those switch_mm() hacks? Is this an attempt > > to work around the locking problems? Please don't do that as it is > > going to kill performance and having ifdef sparc64 sched.c changes is > > ugly to say the least. > > > > Ingo posted the correct fix to the locking problem with the patch > > he posted the other day, that is what should go into the -ac patches. > > I am explicitly refraining from sending Alan any code that is not > well-tested in 2.5 and my machines first. As Ingo's new switch_mm() > bits are not even in 2.5 yet, [...]
Linus applied them already, they will be in 2.5.22. They fix real bugs and i've seen no problems on my testboxes. Those bits are a must for SMP x86 and Sparc64 as well, there is absolutely no reason to selectively delay their backmerge. Besides the last task_rq_lock() optimization which got undone in 2.5 already, all the recent scheduler bits i posted are needed.
Ingo
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