linux-kernel - Re: [PATCH] kswapd: assign new_order and new_classzone

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Message-ID: <1311898238.27358.2416.camel@debian>
Date:	Fri, 29 Jul 2011 08:10:38 +0800
From:	"Alex,Shi" <alex.shi@...el.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	"minchan.kim@...il.com" <minchan.kim@...il.com>,
	"stable@...nel.org" <stable@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"andrea@...share.com" <andrea@...share.com>,
	"Chen, Tim C" <tim.c.chen@...el.com>,
	"Li, Shaohua" <shaohua.li@...el.com>
Subject: Re: [PATCH] kswapd: assign new_order and new_classzone_idx after
 wakeup in sleeping


> Post to linux-mm, cc me.
> 
> > > Acked-by: Mel Gorman <mgorman@...e.de>
> > > 
> > > It won't be merged to -stable until it goes to mainline though so
> > > minimally you need to post this to linux-mm.
> > > 
> > > For -stable, you should explain why it is a candidate. I didn't push
> > > the patch at the time because user problems were already resolved
> > > and I wanted the merged for 3.0 before revisiting it. What problem
> > > did you observe without this patch? With the lack of reference to
> > > the other thread or the previous patch, I'm assuming you found and
> > > solved the problem independently and I'd like to add a test case.
> > 
> > Actually, our LKP testing didn't find this problem on this point. Even
> > with the patch, performance has no change on our machines. I just find
> > this by my eyes. 
> > 
> 
> Dang. I figured all right that it was unlikely the patch would
> actually fix any problem but it looks correct and shouldnt' cause a
> regression. You should resend the patch to Andrew cc'ing the people
> in the old thread and linux-mm and ask Padraig Brady to test the
> patch to confirm his problem does not reappear. When it gets into
> mainline, try for -stable but I think there is very little motivation
> for merging it there.

Thanks a lot for the suggestions. I will do them. 

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