Could this be related to the O(1) scheduler backpatches from 2.6 to 2.4
kernel on newer 2.4er distros (RedHat, SuSE)?
Tom Lane wrote:
>Joe Conway <mail@joeconway.com> writes:
>
>
>>>Improve spinlock code for recent x86 processors: insert a PAUSE
>>>instruction in the s_lock() wait loop, and use test before test-and-set
>>>in TAS() macro to avoid unnecessary bus traffic. Patch from Manfred
>>>Spraul, reworked a bit by Tom.
>>>
>>>
>
>
>
>>I thought this had been committed to the 7.4 stable branch as well, but
>>it appears not.
>>
>>
>
>I am currently chasing what seems to be the same issue: massive context
>swapping on a dual Xeon system. I tried back-patching the above-mentioned
>patch ... it helps a little but by no means solves the problem ...
>
> regards, tom lane
>
>
>
