From: Michal Hocko <mhocko@kernel.org>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Mel Gorman <mgorman@suse.de>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>
Subject: Re: [patch for-5.3 0/4] revert immediate fallback to remote hugepages
Date: Tue, 5 Nov 2019 14:02:53 +0100 [thread overview]
Message-ID: <20191105130253.GO22672@dhcp22.suse.cz> (raw)
In-Reply-To: <alpine.DEB.2.21.1910291623050.9914@chino.kir.corp.google.com>
On Tue 29-10-19 16:25:17, David Rientjes wrote:
> On Tue, 29 Oct 2019, Andrew Morton wrote:
>
> > On Tue, 29 Oct 2019 16:15:49 +0100 Michal Hocko <mhocko@kernel.org> wrote:
> >
> > > >
> > > > 1. local node only THP allocation with no reclaim, just compaction.
> > > > 2. for madvised VMA's or when synchronous compaction is enabled always - THP
> > > > allocation from any node with effort determined by global defrag setting
> > > > and VMA madvise
> > > > 3. fallback to base pages on any node
> > > >
> > > > Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> > >
> > > I've given this a try and here are the results of my previous testcase
> > > (memory full of page cache).
> >
> > Thanks, I'll queue this for some more testing. At some point we should
> > decide on a suitable set of Fixes: tags and a backporting strategy, if any?
> >
>
> I'd strongly suggest that Andrea test this patch out on his workload on
> hosts where all nodes are low on memory because based on my understanding
> of his reported issue this would result in swap storms reemerging but
> worse this time because they wouldn't be constrained only locally. (This
> patch causes us to no longer circumvent excessive reclaim when using
> MADV_HUGEPAGE.)
Could you be more specific on why this would be the case? My testing is
doesn't show any such signs and I am effectivelly testing memory low
situation. The amount of reclaimed memory matches the amount of
requested memory.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-11-05 13:02 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 19:54 [patch for-5.3 0/4] revert immediate fallback to remote hugepages David Rientjes
2019-09-04 19:54 ` [rfc 3/4] mm, page_alloc: avoid expensive reclaim when compaction may not succeed David Rientjes
2019-09-05 9:00 ` Michal Hocko
2019-09-05 11:22 ` Vlastimil Babka
2019-09-05 20:53 ` Mike Kravetz
2019-09-06 20:16 ` David Rientjes
2019-09-06 20:49 ` David Rientjes
2019-09-04 20:43 ` [patch for-5.3 0/4] revert immediate fallback to remote hugepages Linus Torvalds
2019-09-05 20:54 ` David Rientjes
2019-09-07 19:51 ` David Rientjes
2019-09-07 19:55 ` Linus Torvalds
2019-09-08 1:50 ` David Rientjes
2019-09-08 12:47 ` Vlastimil Babka
2019-09-08 20:45 ` David Rientjes
2019-09-09 8:37 ` Michal Hocko
2019-09-04 20:55 ` Andrea Arcangeli
2019-09-05 21:06 ` David Rientjes
2019-09-09 19:30 ` Michal Hocko
2019-09-25 7:08 ` Michal Hocko
2019-09-26 19:03 ` David Rientjes
2019-09-27 7:48 ` Michal Hocko
2019-09-28 20:59 ` Linus Torvalds
2019-09-30 11:28 ` Michal Hocko
2019-10-01 5:43 ` Michal Hocko
2019-10-01 8:37 ` Michal Hocko
2019-10-18 14:15 ` Michal Hocko
2019-10-23 11:03 ` Vlastimil Babka
2019-10-24 18:59 ` David Rientjes
2019-10-29 14:14 ` Vlastimil Babka
2019-10-29 15:15 ` Michal Hocko
2019-10-29 21:33 ` Andrew Morton
2019-10-29 21:45 ` Vlastimil Babka
2019-10-29 23:25 ` David Rientjes
2019-11-05 13:02 ` Michal Hocko [this message]
2019-11-06 1:01 ` David Rientjes
2019-11-06 7:35 ` Michal Hocko
2019-11-06 21:32 ` David Rientjes
2019-11-13 11:20 ` Mel Gorman
2019-11-25 0:10 ` David Rientjes
2019-11-25 11:47 ` Michal Hocko
2019-11-25 20:38 ` David Rientjes
2019-11-25 21:34 ` Vlastimil Babka
2019-10-01 13:50 ` Vlastimil Babka
2019-10-01 20:31 ` David Rientjes
2019-10-01 21:54 ` Vlastimil Babka
2019-10-02 10:34 ` Michal Hocko
2019-10-02 22:32 ` David Rientjes
2019-10-03 8:00 ` Vlastimil Babka
2019-10-04 12:18 ` Michal Hocko
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