Re: [patch-rt 4/4] sched: mark SCHED_HRTICK broken

From: Peter Zijlstra
Date: Thu Jan 29 2009 - 04:58:51 EST


On Wed, 2009-01-28 at 21:29 +0000, Thomas Gleixner wrote:
> plain text document attachment
> (do-not-configure-sched-hrtick-since-it-is-currently-broken.patch)
> SCHED_HRTICK is broken and not yet fixed in mainline. WTF is it still
> enabled in -rt ?

It got fixed in mainline, but past .26. That said, we still disabled in
in mainline because of performance issues.

> Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Tested-by: Carsten Emde <C.Emde@xxxxxxxxx>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
> kernel/Kconfig.hz | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux-2.6.26/kernel/Kconfig.hz
> ===================================================================
> --- linux-2.6.26.orig/kernel/Kconfig.hz
> +++ linux-2.6.26/kernel/Kconfig.hz
> @@ -55,4 +55,4 @@ config HZ
> default 1000 if HZ_1000
>
> config SCHED_HRTICK
> - def_bool HIGH_RES_TIMERS && X86
> + def_bool HIGH_RES_TIMERS && X86 && BROKEN
>

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