Re: [ANNOUNCE] 3.14.23-rt20

[Harry van Haaren]

On Wed, 5 Nov 2014 14:50:41 +0100 Juerg Haefliger <juergh@xxxxxxxxx> wrote:
> The cpufreq code does nested down_read_trylocks and only the first one succeeds:
>drivers/cpufreq/cpufreq.c:
>store
>  down_read_trylock(cpufreq_rwsem)  <- succeeds
>  store_scaling_governor
>    cpufreq_get_policy
>      cpufreq_cpu_get
>        down_read_trylock(cpufreq_rwsem)  <-- fails

On a related note: I think this patch/issue may be the cause of the
-rt CPU frequency scaling bug I reported a couple of months ago.
http://comments.gmane.org/gmane.linux.rt.user/12472

I'm currently using the performance governor by default as a
workaround; thanks to JackWinter for packaging in the ArchAudio repos.

Cheers, -Harry

-- 

http://www.openavproductions.com
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