On Fri, 22 Jan 2016 12:49:02 +0530 Shilpasri G Bhat <shilpa.b...@linux.vnet.ibm.com> wrote:
> cpu_to_chip_id() does a DT walk through to find out the chip id by > taking a contended device tree lock. This adds an unnecessary overhead > in a hot path. So instead of calling cpu_to_chip_id() everytime cache > the chip ids for all cores in the array 'core_to_chip_map' and use it > in the hotpath. > > Reported-by: Anton Blanchard <an...@samba.org> > Signed-off-by: Shilpasri G Bhat <shilpa.b...@linux.vnet.ibm.com> > Reviewed-by: Gautham R. Shenoy <e...@linux.vnet.ibm.com> snip Does the core_to_chip_map need to be updated/refreshed on/after/ a cpu (core) hotplug? I presume id's don't change Balbir _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
