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SubjectRe: CONFIG_NO_HZ breaks blktrace timestamps
Hi.

Ingo Molnar wrote:
> * nigel@suspend2.net <nigel@suspend2.net> wrote:
>
>>>>> Just out of curiosity, could you try the appended cumulative patch
>>>>> and report .clock_warps, .clock_overflows and .clock_underflows as
>>>>> you did.
>>>> With those patches, CONFIG_NO_HZ works just fine.
>> Could these patches also help with hibernation issues? I'm trying
>> x86_64+NO_HZ, and seeing activity delayed during the atomic copy and
>> afterwards until I manually generate interrupts (by pressing keys).
>
> i dont think that should be related to cpu_clock() use. Does the patch
> below make any difference? (or could you try x86.git to get the whole
> stack of x86 changes that we have at the moment.) Here's the coordinates
> for x86.git:

Sorry for the delay in replying. Something seems to help, but I haven't
managed to identify what yet. I don't think it was the patch appended
because I'm on UP. If you care, I'll see if I can find the time to look
more carefully.

Nigel



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