Messages in this thread | | | Subject | Re: difficult to pinpoint exhaustion of swap between 4.2.0-rc6 and 4.2.0-rc7 | From | Vlastimil Babka <> | Date | Fri, 21 Aug 2015 13:48:49 +0200 |
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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.
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