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Date: Thu, 07 Jun 2012 23:55:41 -0400 From: KOSAKI Motohiro <kosaki.motohiro@...il.com> To: Pekka Enberg <penberg@...nel.org> CC: KOSAKI Motohiro <kosaki.motohiro@...il.com>, Anton Vorontsov <cbouatmailru@...il.com>, Minchan Kim <minchan@...nel.org>, Leonid Moiseichuk <leonid.moiseichuk@...ia.com>, John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org, patches@...aro.org, kernel-team@...roid.com Subject: Re: [PATCH 0/5] Some vmevent fixes... (6/5/12 3:52 AM), Pekka Enberg wrote: > On Mon, Jun 4, 2012 at 11:05 PM, KOSAKI Motohiro > <kosaki.motohiro@...il.com> wrote: >>> - On desktops, apps can drop their caches on demand if they want to >>> and can avoid swap activity? >> >> In this case, fallocate(VOLATILE) is work more better. > > For some cases, yes, but probably not for all. > > For example, if userspace doesn't know about "about to swap real soon" > condition, it can continue to grow its caches making > fallocate(VOLATILE) pretty much useless. Fair enough. But, Please consider your scenario don't need vmevent(2), cat /proc/meminfo works enough. Only dropping activity need a quick work and just in time notification. cache growing limitation don't need. -- 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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