Messages in this thread | | | Subject | Re: [PATCH v3 5/5] cpusets, suspend: Save and restore cpusets during suspend/resume | From | Peter Zijlstra <> | Date | Tue, 15 May 2012 23:13:27 +0200 |
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On Tue, 2012-05-15 at 14:05 -0700, David Rientjes wrote: > Not sure what you're disagreeing with, it only happens with > MPOL_F_STATIC_NODES or MPOL_F_RELATIVE_NODES and I've clearly defined the > behavior in the man page. I personally never had a use-case for > MPOL_F_RELATIVE_NODES but Paul Jackson asked that it be added for SGI when > we added mempolicy mode flags.
So what you're saying is that:
task t: set_mempolicy(,mask=2-3);
add t to cpuset A
A.mems = 0-1 A.mems = 0-n
At which point t will again have 2-3, right?
My objection is that you'll have to keep the 2-3 mask around some place because t->mems_allowed will be wrecked by cpuset actions.
Also, what does it mean to silently return to 2-3 after you've broken that promise by forcing it to 0-1 using cpusets?
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