[PATCH v2 0/1] pseries/hotplug: Change the default behaviour of cede_offline

Gautham R Shenoy ego at linux.vnet.ibm.com
Tue Oct 29 22:13:14 AEDT 2019


Hello Nathan,


On Fri, Oct 25, 2019 at 06:03:26PM -0500, Nathan Lynch wrote:
> "Gautham R. Shenoy" <ego at linux.vnet.ibm.com> writes:
> > This is the v2 of the fix to change the default behaviour of
> > cede_offline.
> 
> OK, but why keep the cede offline behavior at all? Can we remove it? I
> think doing so would allow us to remove all the code that temporarily
> onlines threads for partition migration.

May be I am missing something. But don't we want all the CPUs to come
online and execute the H_JOIN hcall before performing partition
migration? How will this change whether the offlined CPUs are in
H_CEDE or rtas-stop-self?

--
Thanks and Regards
gautham.




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