Messages in this thread | | | Subject | Re: [PATCH v2] x86, mm: Avoid duplicated pxm_to_node() calling. | From | Toshi Kani <> | Date | Mon, 27 Jan 2014 07:49:42 -0700 |
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On Sun, 2014-01-26 at 13:01 -0800, Yinghai Lu wrote: > In slit init code, more pxm_to_node() calling are added. > > We can store from_node/to_node instead of keep calling pxm_to_node(). > > After this patch: pxm_to_node() is called n*(1+n) > Before this patch: pxm_to_node() is called n*(1+n*3) > > for 8 socket, it will be 72 instead of 200. > for 32 socket, it will be 1056 instead of 3104. > > -v2: update title and change log according to Ingo. > move from_node/to_node in loop and change to const according to > David Rientjes. > > Signed-off-by: Yinghai Lu <yinghai@kernel.org>
In my original patch, I added the following comment to the function to address David's comment (which he acked). So, can you add this comment?
-/* Callback for SLIT parsing */ +/* + * Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for + * I/O localities since SRAT does not list them. I/O localities are + * not supported at this point. + */
Otherwise, the change looks good to me.
Acked-by: Toshi Kani <toshi.kani@hp.com>
Thanks, -Toshi
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