From: Andrew Morton <akpm@linux-foundation.org>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Shantanu Goel <sgoel01@yahoo.com>, Chris Mason <clm@fb.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Vlastimil Babka <vbabka@suse.cz>,
LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>
Subject: Re: [PATCH 0/3] Reduce amount of time kswapd sleeps prematurely
Date: Wed, 15 Feb 2017 13:56:54 -0800 [thread overview]
Message-ID: <20170215135654.315cbdca1c403c90a74f1bdd@linux-foundation.org> (raw)
In-Reply-To: <20170215212906.3myab4545wa2f3yc@techsingularity.net>
On Wed, 15 Feb 2017 21:29:06 +0000 Mel Gorman <mgorman@techsingularity.net> wrote:
> On Wed, Feb 15, 2017 at 12:30:55PM -0800, Andrew Morton wrote:
> > On Wed, 15 Feb 2017 09:22:44 +0000 Mel Gorman <mgorman@techsingularity.net> wrote:
> >
> > > This patchset is based on mmots as of Feb 9th, 2016. The baseline is
> > > important as there are a number of kswapd-related fixes in that tree and
> > > a comparison against v4.10-rc7 would be almost meaningless as a result.
> >
> > It's very late to squeeze this into 4.10. We can make it 4.11 material
> > and perhaps tag it for backporting into 4.10.1?
>
> It would be important that Johannes's patches go along with then because
> I'm relied on Johannes' fixes to deal with pages being inappropriately
> written back from reclaim context when I was analysing the workload.
> I'm thinking specifically about these patches
>
> mm-vmscan-scan-dirty-pages-even-in-laptop-mode.patch
> mm-vmscan-kick-flushers-when-we-encounter-dirty-pages-on-the-lru.patch
> mm-vmscan-kick-flushers-when-we-encounter-dirty-pages-on-the-lru-fix.patch
> mm-vmscan-remove-old-flusher-wakeup-from-direct-reclaim-path.patch
> mm-vmscan-only-write-dirty-pages-that-the-scanner-has-seen-twice.patch
> mm-vmscan-move-dirty-pages-out-of-the-way-until-theyre-flushed.patch
> mm-vmscan-move-dirty-pages-out-of-the-way-until-theyre-flushed-fix.patch
>
> This is 4.11 material for sure but I would not automatically try merging
> them to 4.10 unless those patches were also included, ideally with a rerun
> of just those patches against 4.10 to make sure there are no surprises
> lurking in there.
Head spinning a bit. You're saying that if the three patches in the
series "Reduce amount of time kswapd sleeps prematurely" are held off
until 4.11 then the above 6 patches from Johannes should also be held
off for 4.11?
next prev parent reply other threads:[~2017-02-15 21:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-15 9:22 Mel Gorman
2017-02-15 9:22 ` [PATCH 1/3] mm, vmscan: fix zone balance check in prepare_kswapd_sleep Mel Gorman
2017-02-16 2:50 ` Hillf Danton
2017-02-22 7:00 ` Minchan Kim
2017-02-23 15:05 ` Mel Gorman
2017-02-24 1:17 ` Minchan Kim
2017-02-24 9:11 ` Mel Gorman
2017-02-27 6:16 ` Minchan Kim
2017-02-15 9:22 ` [PATCH 2/3] mm, vmscan: Only clear pgdat congested/dirty/writeback state when balanced Mel Gorman
2017-02-15 9:22 ` [PATCH 3/3] mm, vmscan: Prevent kswapd sleeping prematurely due to mismatched classzone_idx Mel Gorman
2017-02-16 6:23 ` Hillf Danton
2017-02-16 8:10 ` Mel Gorman
2017-02-16 8:21 ` Hillf Danton
2017-02-16 9:32 ` Mel Gorman
2017-02-20 16:34 ` Vlastimil Babka
2017-02-21 4:10 ` Hillf Danton
2017-02-20 16:42 ` Vlastimil Babka
2017-02-23 15:01 ` Mel Gorman
2017-03-01 9:04 ` Vlastimil Babka
2017-02-15 20:30 ` [PATCH 0/3] Reduce amount of time kswapd sleeps prematurely Andrew Morton
2017-02-15 21:29 ` Mel Gorman
2017-02-15 21:56 ` Andrew Morton [this message]
2017-02-15 22:15 ` Mel Gorman
2017-02-15 22:00 ` Vlastimil Babka
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