Re: CONFIG_NO_HZ breaks blktrace timestamps

From: nigel
Date: Fri Jan 11 2008 - 04:28:53 EST


Hi.

Jens Axboe wrote:
> On Thu, Jan 10 2008, David Dillow wrote:
>> On Thu, 2008-01-10 at 23:44 +0100, Guillaume Chazarain wrote:
>>> David Dillow <dillowda@xxxxxxxx> wrote:
>>>
>>>> At the moment, I'm not sure how to track this farther, or how to fix it
>>>> properly. Any advice would be appreciated.
>>> 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).

Regards,

Nigel

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