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Message-Id: <20140616164237.5fcba7baaec83d509c9683e0@linux-foundation.org> Date: Mon, 16 Jun 2014 16:42:37 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Chen Yucong <slaoub@...il.com> Cc: mhocko@...e.cz, hannes@...xchg.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] mm/vmscan.c: avoid recording the original scan targets in shrink_lruvec() On Mon, 16 Jun 2014 20:57:54 +0800 Chen Yucong <slaoub@...il.com> wrote: > On Mon, 2014-06-09 at 21:27 +0800, Chen Yucong wrote: > > Via https://lkml.org/lkml/2013/4/10/334 , we can find that recording the > > original scan targets introduces extra 40 bytes on the stack. This patch > > is able to avoid this situation and the call to memcpy(). At the same time, > > it does not change the relative design idea. > > > > ratio = original_nr_file / original_nr_anon; > > > > If (nr_file > nr_anon), then ratio = (nr_file - x) / nr_anon. > > x = nr_file - ratio * nr_anon; > > > > if (nr_file <= nr_anon), then ratio = nr_file / (nr_anon - x). > > x = nr_anon - nr_file / ratio; > > > Hi Andrew Morton, > > I think the patch > > [PATCH] > mm-vmscanc-avoid-recording-the-original-scan-targets-in-shrink_lruvec-fix.patch > > which I committed should be discarded. OK, thanks. I assume you're referring to mm-vmscanc-avoid-recording-the-original-scan-targets-in-shrink_lruvec.patch - I don't think a -fix.patch existed? -- 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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