Messages in this thread | | | Date | Fri, 21 Aug 2015 22:13:05 +0930 | From | Arthur Marsh <> | Subject | Re: difficult to pinpoint exhaustion of swap between 4.2.0-rc6 and 4.2.0-rc7 |
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Vlastimil Babka wrote on 21/08/15 21:18: > On 08/21/2015 01:37 PM, Vlastimil Babka wrote: >> >> That, said, looking at the memory values: >> >> rc6: Free+Buffers+A/I(Anon)+A/I(File)+Slab = 6769MB >> rc7: ... = 4714MB >> >> That's 2GB unaccounted for. > > So one brute-force way to see who allocated those 2GB is to use the > page_owner debug feature. You need to enable CONFIG_PAGE_OWNER and then > follow the Usage part of Documentation/vm/page_owner.txt > If you can do that, please send the sorted_page_owner.txt for rc7 when > it's semi-nearing the exhausted swap. Then you could start doing a > comparison run with rc6, but maybe it will be easy to figure from the > rc7 log already. Thanks. >
I'm currently rebuilding the rc7 kernel with CONFIG_PAGE_OWNER=y and will test that.
Arthur.
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