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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