Messages in this thread | | | Date | Wed, 21 May 2014 23:57:23 +0400 | From | Cyrill Gorcunov <> | Subject | Re: [PATCH] mm: /prom/pid/clear_refs: avoid split_huge_page() |
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On Wed, May 21, 2014 at 12:34:46PM -0700, Andrew Morton wrote: > On Wed, 21 May 2014 22:04:22 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote: > > > Currently we split all THP pages on any clear_refs request. It's not > > necessary. We can handle this on PMD level. > > > > One side effect is that soft dirty will potentially see more dirty > > memory, since we will mark whole THP page dirty at once. > > This clashes pretty badly with > http://ozlabs.org/~akpm/mmots/broken-out/clear_refs-redefine-callback-functions-for-page-table-walker.patch > > > Sanity checked with CRIU test suite. More testing is required. > > Will you be doing that testing or was this a request for Cyrill & co to > help?
We've talking to Kirill how to test is and end up that criu is the best candidate (though I think I'll write selftest for vanilla too, hopefully tomorrow).
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