b077ffb3b7
There was OpenVZ specific bug rendering some cpufreq drivers unusable on SMP.
In short, when cpufreq code thinks it confined itself to needed cpu by means
of set_cpus_allowed() to execute rdmsr, some "virtual cpu" feature can migrate
process to anywhere. This triggers bugons and does wrong things in general.
This got fixed by introducing rdmsr_on_cpu and wrmsr_on_cpu executing rdmsr
and wrmsr on given physical cpu by means of smp_call_function_single().
Dave Jones mentioned cpufreq might be not only user of rdmsr_on_cpu() and
wrmsr_on_cpu(), so I'm putting them into arch/{i386,x86_64}/lib/ .
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Jones <davej@redhat.com>
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| .. | ||
| bitops.c | ||
| bitstr.c | ||
| clear_page.S | ||
| copy_page.S | ||
| copy_user.S | ||
| csum-copy.S | ||
| csum-partial.c | ||
| csum-wrappers.c | ||
| delay.c | ||
| getuser.S | ||
| io.c | ||
| iomap_copy.S | ||
| Makefile | ||
| memcpy.S | ||
| memmove.c | ||
| memset.S | ||
| msr-on-cpu.c | ||
| putuser.S | ||
| rwlock.S | ||
| thunk.S | ||
| usercopy.c | ||