-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 02/06/2015 01:32 PM, Shaohua Li wrote: > On Fri, Feb 06, 2015 at 01:58:25PM +0100, Michal Hocko wrote: >> On Thu 05-02-15 16:33:11, Shaohua Li wrote: [...] >>> Did you think about move the MADV_FREE pages to the head of >>> inactive LRU, so they can be reclaimed easily? >> >> Yes this makes sense for pages living on the active LRU list. I >> would preserve LRU ordering on the inactive list because there is >> no good reason to make the operation more costly for inactive >> pages. On the other hand having tons of to-be-freed pages on the >> active list clearly sucks. Care to send a patch? > > Considering anon pages are in active LRU first, it's likely > MADV_FREE pages are in active list. I'm curious why preserves the > order of inactive list. Only before the first time MADV_FREE is called on those pages. If a program repeatedly allocates and frees the same memory region, not moving the MADV_FREE pages around in the LRU several times can save some overhead. - -- All rights reversed -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJU1QqHAAoJEM553pKExN6DTXoH/3bS+VhdIm1EpOc8OOFtBHvd T63DHObtOY1FOog48CtgvUCfo7Q+g1aG/9hz7lJNP1G26B3+LNszM9OtE/9QrYUH uzmuWvFL7l0W0qen/WsyO0RcyqN+0mEXvNVqynTmJJu8qAG0p5WsjA6L5Penzj// tnBmn5xb1h3COjDZkHsxBfkpfCpNq5dm88K6B3nApHz4QhfcviKefczsrWdZ/bBc 2uMnlIebKY1Oq9MDHsg8p/b3lIHzwAf0xGSvGLN0YfzDPzlqBMbxSbVubYEA9EaU OiS1XqRp8okeGgrxsRAb/F8wPgClpce+h0E5xpyUuew2rlD1OmciX6iIDcE5Zrk= =KUng -----END PGP SIGNATURE----- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>