Messages in this thread | | | From | Sandeep Patil <> | Date | Tue, 10 Apr 2012 10:19:56 -0700 | Subject | Re: [PATCHv24 00/16] Contiguous Memory Allocator |
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>> >> This is (yet another) update of CMA patches. > > > How well CMA is supposed to work if you have mlocked processes? I've > been testing these patches, and noticed that by creating a small mlocked > process you start to get plenty of test_pages_isolated() failure warnings, > and bigger allocations will always fail.
CMIIW, I think mlocked pages are never migrated. The reason is because __isolate_lru_pages() does not isolate Unevictable pages right now.
Minchan added support to allow this but the patch was dropped.
See the discussion at : https://lkml.org/lkml/2011/8/29/295
Sandeep
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