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SubjectRe: gettimeofday order of magnitude slower with pmtimer, which is default
OGAWA Hirofumi wrote:
> john stultz <johnstul@us.ibm.com> writes:
>
>
>> In my TOD rework I've dropped the triple read, figuring if a problem
>> arose we could blacklist the specific box. This patch covers that, so it
>> looks like a good idea to me.
>>
>> I've not tested it myself, but if you feel good about it, please send it
>> to Andrew.
>>
>
> Current patch is the following. If I'm missing something, or you have
> some comment, please tell me. (Since I don't have ICH4, ICH4 detection
> is untested)
>
Doesn't it make sense to mark the port as user accessible in the I/O
permissions bitmap and export it as a vsyscall? that would save the
syscall overhead.


--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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