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Groups > linux.kernel > #1402819
| From | Richard Weinberger <richard@nod.at> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: UBIFS and page migration (take 3) |
| Date | 2016-05-18 11:10 +0200 |
| Message-ID | <rA5El-8tT-7@gated-at.bofh.it> (permalink) |
| References | <rxCQa-UH-21@gated-at.bofh.it> <rxXhU-4OQ-11@gated-at.bofh.it> <rzq89-78d-3@gated-at.bofh.it> <rzqrv-7tO-1@gated-at.bofh.it> <rzLmh-3UX-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Am 17.05.2016 um 13:27 schrieb Richard Weinberger: > Vlastimil, > > Am 16.05.2016 um 15:03 schrieb Vlastimil Babka: >> On 05/16/2016 02:44 PM, Richard Weinberger wrote: >>> MM folks, do we have a way to force page migration? >> >> On NUMA we have migrate_pages(2). > > Doesn't this only migrate process (user) pages? > AFAIK we need a way to force migration of pages which > are in the page cache. While migrate_pages(2) does not seem to hit the ->migratepage() function, echo 1 > /proc/sys/vm/compact_memory does. Thanks Vlastimil for pointing me in the right direction! Just reproduce the issue on UBIFS in a KVM guest and a simulated NAND. :-) Let's see whether I can come up with a generic test. Thanks, //richard
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Re: UBIFS and page migration (take 3) Richard Weinberger <richard@nod.at> - 2016-05-16 14:50 +0200
Re: UBIFS and page migration (take 3) Vlastimil Babka <vbabka@suse.cz> - 2016-05-16 15:10 +0200
Re: UBIFS and page migration (take 3) Christoph Hellwig <hch@infradead.org> - 2016-05-17 11:20 +0200
Re: UBIFS and page migration (take 3) Richard Weinberger <richard@nod.at> - 2016-05-17 13:30 +0200
Re: UBIFS and page migration (take 3) Richard Weinberger <richard@nod.at> - 2016-05-18 11:10 +0200
Re: UBIFS and page migration (take 3) Christoph Hellwig <hch@infradead.org> - 2016-05-17 11:20 +0200
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