On Mon, Apr 03, 2017 at 11:18:19AM +0200, Michal Hocko wrote: >On Tue 28-03-17 09:11:37, Wei Yang wrote: >> Hi, masters, >> >> # What I found >> >> I found the function calc_memmap_size() may not be that accurate to get the >> pages for memmap. >> >> The reason is: >> >> > memmap is allocated on a node base, >> > while the calculation is on a zone base >> >> This applies both to SPARSEMEM and FLATMEM. >> >> For example, on my laptop with 6G memory, all the memmap space is allocated >> from ZONE_NORMAL. > >Please try to be more specific. Why is this a problem? Are you trying to >fix some bad behavior or you want to make it more optimal? > >I am sorry I didn't look closer into your proposal but I am quite busy >and other people are probably in a similar situation. If you want to get >a proper feedback please try to state the problem and be explicit if it >is user observable. Michal Glad to hear from you. Sure, let me do more investigation on this and try some experiment to see whether this change is observable. Have a nice day~ >-- >Michal Hocko >SUSE Labs -- Wei Yang Help you, Help me
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