From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx168.postini.com [74.125.245.168]) by kanga.kvack.org (Postfix) with SMTP id 478226B0032 for ; Wed, 26 Jun 2013 03:47:04 -0400 (EDT) Date: Wed, 26 Jun 2013 16:47:08 +0900 From: Minchan Kim Subject: Re: [PATCH v6] memcg: event control at vmpressure. Message-ID: <20130626074708.GF29127@bbox> References: <20130619125329.GB16457@dhcp22.suse.cz> <000401ce6d5c$566ac620$03405260$%kim@samsung.com> <20130620121649.GB27196@dhcp22.suse.cz> <001e01ce6e15$3d183bd0$b748b370$%kim@samsung.com> <001f01ce6e15$b7109950$2531cbf0$%kim@samsung.com> <20130621012234.GF11659@bbox> <20130621091944.GC12424@dhcp22.suse.cz> <20130621162743.GA2837@gmail.com> <20130621164413.GA4759@gmail.com> <20130622002744.GA29172@lizard.mcd26095.sjc.wayport.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130622002744.GA29172@lizard.mcd26095.sjc.wayport.net> Sender: owner-linux-mm@kvack.org List-ID: To: Anton Vorontsov Cc: Michal Hocko , Hyunhee Kim , linux-mm@kvack.org, akpm@linux-foundation.org, rob@landley.net, kamezawa.hiroyu@jp.fujitsu.com, hannes@cmpxchg.org, rientjes@google.com, kirill@shutemov.name, 'Kyungmin Park' Hey Anton, On Fri, Jun 21, 2013 at 05:27:44PM -0700, Anton Vorontsov wrote: > On Sat, Jun 22, 2013 at 01:44:14AM +0900, Minchan Kim wrote: > [...] > > 3. The reclaimed could be greater than scanned in vmpressure_evnet > > by several reasons. Totally, It could trigger wrong event. > > Yup, and in that case the best we can do is just ignore the event (i.e. > not pass it to the userland): thing is, based on the fact that > 'reclaimed > scanned' we can't actually conclude anything about the > pressure: it might be still high, or we actually freed enough. I'd like to make a safe guard with low notifier rather than ignoring. > > Thanks, > > Anton > > p.s. I was somewhat sure that someone sent a patch to ignore 'reclaimed > > scanned' situation, but I cannot find it in my mailbox. Maybe I was > dreaming about it? :) You seem to work while you're sleeping. Dear Penguin, please, take a rest. :) > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: email@kvack.org -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org