From: Michal Hocko <mhocko@suse.com>
To: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Cc: Mel Gorman <mgorman@techsingularity.net>,
Zi Yan <zi.yan@cs.rutgers.edu>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Alex Williamson <alex.williamson@redhat.com>,
David Rientjes <rientjes@google.com>,
Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH] mm, thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings
Date: Mon, 17 Sep 2018 13:27:51 +0200 [thread overview]
Message-ID: <20180917112751.GD26286@dhcp22.suse.cz> (raw)
In-Reply-To: <e43348ae-c2db-e327-8dd6-c4f6f0e0cac0@profihost.ag>
On Mon 17-09-18 09:04:02, Stefan Priebe - Profihost AG wrote:
> Hi,
>
> i had multiple memory stalls this weekend again. All kvm processes where
> spinning trying to get > 100% CPU and i was not able to even login to
> ssh. After 5-10 minutes i was able to login.
>
> There were about 150GB free mem on the host.
>
> Relevant settings (no local storage involved):
> vm.dirty_background_ratio:
> 3
> vm.dirty_ratio:
> 10
> vm.min_free_kbytes:
> 10567004
>
> # cat /sys/kernel/mm/transparent_hugepage/defrag
> always defer [defer+madvise] madvise never
>
> # cat /sys/kernel/mm/transparent_hugepage/enabled
> [always] madvise never
>
> After that i had the following traces on the host node:
> https://pastebin.com/raw/0VhyQmAv
I would suggest reporting this in a new email thread. I would also
recommend to CC kvm guys (see MAINTAINERS file in the kernel source
tree) and trace qemu/kvm processes to see what they are doing at the
time when you see the stall.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-09-17 11:27 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-20 3:22 [PATCH 0/2] fix for "pathological THP behavior" Andrea Arcangeli
2018-08-20 3:22 ` [PATCH 1/2] mm: thp: consolidate policy_nodemask call Andrea Arcangeli
2018-08-20 3:22 ` [PATCH 2/2] mm: thp: fix transparent_hugepage/defrag = madvise || always Andrea Arcangeli
2018-08-20 3:26 ` [PATCH 0/1] fix for "pathological THP behavior" v2 Andrea Arcangeli
2018-08-20 3:26 ` [PATCH 1/1] mm: thp: fix transparent_hugepage/defrag = madvise || always Andrea Arcangeli
2018-08-20 12:35 ` [PATCH 2/2] " Zi Yan
2018-08-20 15:32 ` Andrea Arcangeli
2018-08-21 11:50 ` Michal Hocko
2018-08-21 21:40 ` Andrea Arcangeli
2018-08-22 9:02 ` Michal Hocko
2018-08-22 11:07 ` Michal Hocko
2018-08-22 14:24 ` Andrea Arcangeli
2018-08-22 14:45 ` Michal Hocko
2018-08-22 15:24 ` Andrea Arcangeli
2018-08-23 10:50 ` Michal Hocko
2018-08-22 15:52 ` Andrea Arcangeli
2018-08-23 10:52 ` Michal Hocko
2018-08-28 7:53 ` Michal Hocko
2018-08-28 8:18 ` Michal Hocko
2018-08-28 8:54 ` Stefan Priebe - Profihost AG
2018-08-29 11:11 ` Stefan Priebe - Profihost AG
[not found] ` <D5F4A33C-0A37-495C-9468-D6866A862097@cs.rutgers.edu>
2018-08-29 14:28 ` Michal Hocko
2018-08-29 14:35 ` Michal Hocko
2018-08-29 15:22 ` Zi Yan
2018-08-29 15:47 ` Michal Hocko
2018-08-29 16:06 ` Zi Yan
2018-08-29 16:25 ` Michal Hocko
2018-08-29 19:24 ` [PATCH] mm, thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings Michal Hocko
2018-08-29 22:54 ` Zi Yan
2018-08-30 7:00 ` Michal Hocko
2018-08-30 13:22 ` Zi Yan
2018-08-30 13:45 ` Michal Hocko
2018-08-30 14:02 ` Zi Yan
2018-08-30 16:19 ` Stefan Priebe - Profihost AG
2018-08-30 16:40 ` Michal Hocko
2018-09-05 3:44 ` Andrea Arcangeli
2018-09-05 7:08 ` Michal Hocko
2018-09-06 11:10 ` Vlastimil Babka
2018-09-06 11:16 ` Vlastimil Babka
2018-09-06 11:25 ` Michal Hocko
2018-09-06 12:35 ` Zi Yan
2018-09-06 10:59 ` Vlastimil Babka
2018-09-06 11:17 ` Zi Yan
2018-08-30 6:47 ` Michal Hocko
2018-09-06 11:18 ` Vlastimil Babka
2018-09-06 11:27 ` Michal Hocko
2018-09-12 17:29 ` Mel Gorman
2018-09-17 6:11 ` Michal Hocko
2018-09-17 7:04 ` Stefan Priebe - Profihost AG
2018-09-17 9:32 ` Stefan Priebe - Profihost AG
2018-09-17 11:27 ` Michal Hocko [this message]
2018-08-20 11:58 ` [PATCH 0/2] fix for "pathological THP behavior" Kirill A. Shutemov
2018-08-20 15:19 ` Andrea Arcangeli
2018-08-21 15:30 ` Vlastimil Babka
2018-08-21 17:26 ` David Rientjes
2018-08-21 22:18 ` Andrea Arcangeli
2018-08-21 22:05 ` Andrea Arcangeli
2018-08-22 9:24 ` Michal Hocko
2018-08-22 15:56 ` Andrea Arcangeli
2018-08-20 19:06 ` Yang Shi
2018-08-20 23:24 ` Andrea Arcangeli
2018-09-07 13:05 [PATCH] mm, thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings Michal Hocko
2018-09-08 18:52 ` Stefan Priebe - Profihost AG
2018-09-10 7:39 ` Michal Hocko
2018-09-11 9:03 ` Vlastimil Babka
2018-09-10 20:08 ` David Rientjes
2018-09-10 20:22 ` Stefan Priebe - Profihost AG
2018-09-11 8:51 ` Vlastimil Babka
2018-09-11 11:56 ` Michal Hocko
2018-09-11 20:30 ` David Rientjes
2018-09-12 12:05 ` Michal Hocko
2018-09-12 20:40 ` David Rientjes
2018-09-12 13:54 ` Andrea Arcangeli
2018-09-12 14:21 ` Michal Hocko
2018-09-12 15:25 ` Michal Hocko
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