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Date: Sat, 4 Oct 2008 00:15:17 +0900 (JST) From: kamezawa.hiroyu@...fujitsu.com To: Daisuke Nishimura <nishimura@....nes.nec.co.jp> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, nishimura@....nes.nec.co.jp, linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>, balbir@...ux.vnet.ibm.com Subject: Re: Re: [PATCH 3/6] memcg: charge-commit-cancel protocl ----- Original Message ----- >> precharge/commit/cancel can be used for other places, >> - shmem, (and other places need precharge.) >> - move_account(force_empty) etc... >> we'll revisit later. >> >> Changelog v5 -> v6: >> - added newpage_charge() and migrate_fixup(). >> - renamed functions for swap-in from "swap" to "swapin" >> - add more precise description. >> > >I don't have any objection to this direction now, but I have one quiestion. > >Does mem_cgroup_charge_migrate_fixup need to charge a newpage, >while mem_cgroup_prepare_migration has charged it already? In migration-is-failed case, we have to charge *old page* here. > >I agree adding I/F would be good for future, but I think >mem_cgroup_charge_migration_fixup can be no-op function for now. > Hmm, handling failure case in explicit way may be better. Ok, I'll try some. Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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