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Date: Mon, 8 Nov 2010 07:56:43 +0900 From: Minchan Kim <minchan.kim@...il.com> To: Johannes Weiner <hannes@...xchg.org> Cc: Greg Thelen <gthelen@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, Dave Young <hidave.darkstar@...il.com>, Andrea Righi <arighi@...eler.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Daisuke Nishimura <nishimura@....nes.nec.co.jp>, Balbir Singh <balbir@...ux.vnet.ibm.com>, Wu Fengguang <fengguang.wu@...el.com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [patch 1/4] memcg: use native word to represent dirtyable pages On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner <hannes@...xchg.org> wrote: > The memory cgroup dirty info calculation currently uses a signed > 64-bit type to represent the amount of dirtyable memory in pages. > > This can instead be changed to an unsigned word, which will allow the > formula to function correctly with up to 160G of LRU pages on a 32-bit > system, assuming 4k pages. That should be plenty even when taking > racy folding of the per-cpu counters into account. > > This fixes a compilation error on 32-bit systems as this code tries to > do 64-bit division. > > Signed-off-by: Johannes Weiner <hannes@...xchg.org> > Reported-by: Dave Young <hidave.darkstar@...il.com> Reviewed-by: Minchan Kim <minchan.kim@...il.com> -- Kind regards, Minchan Kim -- 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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