Re: [patch 00/15] CFS Bandwidth Control V5

[Paul Turner]

On Thu, Mar 31, 2011 at 12:57 AM, Xiao Guangrong
<xiaoguangrong@xxxxxxxxxxxxxx> wrote:
> On 03/23/2011 11:03 AM, Paul Turner wrote:
>> Hi all,
>>
>> Please find attached the latest version of bandwidth control for the normal
>> scheduling class.  This revision has undergone fairly extensive changes since
>> the previous version based largely on the observation that many of the edge
>> conditions requiring special casing around update_curr() were a result of
>> introducing side-effects into that operation.  By introducing an interstitial
>> state, where we recognize that the runqueue is over bandwidth, but not marking
>> it throttled until we can actually remove it from the CPU we avoid the
>> previous possible interactions with throttled entities which eliminates some
>> head-scratching corner cases.
>>
>
> Hi Paul,
>
> I have wrote some codes to test this patchset. While run attached test case,
> the test program is blocked, it seams the children tasks can not be killed,
> after one or two hours, the watchdog is expired and triggers box crashed.
>

Sorry, I was out last week.

I'm taking a look at this now, I believe the interaction lies
somewhere within the quota return paths.

Thanks for taking the time to test!

- Paul
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