From: Michal Hocko <mhocko@kernel.org>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
mgorman@techsingularity.net, Vlastimil Babka <vbabka@suse.cz>,
ying.huang@intel.com, s.priebe@profihost.ag,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
alex.williamson@redhat.com, lkp@01.org, kirill@shutemov.name,
Andrew Morton <akpm@linux-foundation.org>,
zi.yan@cs.rutgers.edu
Subject: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Fri, 14 Dec 2018 12:32:41 +0100 [thread overview]
Message-ID: <20181214113241.GC5343@dhcp22.suse.cz> (raw)
In-Reply-To: <20181212170016.GG1130@redhat.com>
On Wed 12-12-18 12:00:16, Andrea Arcangeli wrote:
[...]
> Adding MADV_THISNODE/MADV_NODE_RECLAIM, will guarantee his proprietary
> software binary will run at maximum performance without cache
> interference, and he's happy to accept the risk of massive slowdown in
> case the local node is truly OOM. The fallback, despite very
> inefficient, will still happen without OOM killer triggering.
I believe this fits much better into a MPOL_$FOO rather than MADV_$FOO.
But other than that I full agree. There are reasonable usecases for the
node reclaim like behavior. As a bonus you do not get local node only
but all nodes within reclaim distance as well.
--
Michal Hocko
SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: lkp@lists.01.org
Subject: Re: [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression
Date: Fri, 14 Dec 2018 12:32:41 +0100 [thread overview]
Message-ID: <20181214113241.GC5343@dhcp22.suse.cz> (raw)
In-Reply-To: <20181212170016.GG1130@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 697 bytes --]
On Wed 12-12-18 12:00:16, Andrea Arcangeli wrote:
[...]
> Adding MADV_THISNODE/MADV_NODE_RECLAIM, will guarantee his proprietary
> software binary will run at maximum performance without cache
> interference, and he's happy to accept the risk of massive slowdown in
> case the local node is truly OOM. The fallback, despite very
> inefficient, will still happen without OOM killer triggering.
I believe this fits much better into a MPOL_$FOO rather than MADV_$FOO.
But other than that I full agree. There are reasonable usecases for the
node reclaim like behavior. As a bonus you do not get local node only
but all nodes within reclaim distance as well.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-12-14 11:32 UTC|newest]
Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 6:25 [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression kernel test robot
2018-11-27 6:25 ` kernel test robot
2018-11-27 17:08 ` [LKP] " Linus Torvalds
2018-11-27 17:08 ` Linus Torvalds
2018-11-27 18:17 ` [LKP] " Michal Hocko
2018-11-27 18:17 ` Michal Hocko
2018-11-27 18:21 ` [LKP] " Michal Hocko
2018-11-27 18:21 ` Michal Hocko
2018-11-27 19:05 ` [LKP] " Vlastimil Babka
2018-11-27 19:05 ` Vlastimil Babka
2018-11-27 19:16 ` [LKP] " Vlastimil Babka
2018-11-27 19:16 ` Vlastimil Babka
2018-11-27 20:57 ` [LKP] " Andrea Arcangeli
2018-11-27 20:57 ` Andrea Arcangeli
2018-11-27 22:50 ` [LKP] " Linus Torvalds
2018-11-27 22:50 ` Linus Torvalds
2018-11-28 6:30 ` [LKP] " Michal Hocko
2018-11-28 6:30 ` Michal Hocko
2018-11-28 3:20 ` [LKP] " Huang, Ying
2018-11-28 3:20 ` Huang, Ying
2018-11-28 16:48 ` [LKP] " Linus Torvalds
2018-11-28 16:48 ` Linus Torvalds
2018-11-28 18:39 ` [LKP] " Andrea Arcangeli
2018-11-28 18:39 ` Andrea Arcangeli
2018-11-28 23:10 ` [LKP] " David Rientjes
2018-11-28 23:10 ` David Rientjes
2018-12-03 18:01 ` [LKP] " Linus Torvalds
2018-12-03 18:01 ` Linus Torvalds
2018-12-03 18:14 ` [LKP] " Michal Hocko
2018-12-03 18:14 ` Michal Hocko
2018-12-03 18:19 ` [LKP] " Linus Torvalds
2018-12-03 18:19 ` Linus Torvalds
2018-12-03 18:30 ` [LKP] " Michal Hocko
2018-12-03 18:30 ` Michal Hocko
2018-12-03 18:45 ` [LKP] " Linus Torvalds
2018-12-03 18:45 ` Linus Torvalds
2018-12-03 18:59 ` [LKP] " Michal Hocko
2018-12-03 18:59 ` Michal Hocko
2018-12-03 19:23 ` [LKP] " Andrea Arcangeli
2018-12-03 19:23 ` Andrea Arcangeli
2018-12-03 20:26 ` [LKP] " David Rientjes
2018-12-03 20:26 ` David Rientjes
2018-12-03 19:28 ` [LKP] " Linus Torvalds
2018-12-03 19:28 ` Linus Torvalds
2018-12-03 20:12 ` [LKP] " Andrea Arcangeli
2018-12-03 20:12 ` Andrea Arcangeli
2018-12-03 20:36 ` [LKP] " David Rientjes
2018-12-03 20:36 ` David Rientjes
2018-12-03 22:04 ` [LKP] " Linus Torvalds
2018-12-03 22:04 ` Linus Torvalds
2018-12-03 22:27 ` [LKP] " Linus Torvalds
2018-12-03 22:27 ` Linus Torvalds
2018-12-03 22:57 ` [LKP] " David Rientjes
2018-12-03 22:57 ` David Rientjes
2018-12-04 9:22 ` [LKP] " Vlastimil Babka
2018-12-04 9:22 ` Vlastimil Babka
2018-12-04 10:45 ` [LKP] " Mel Gorman
2018-12-04 10:45 ` Mel Gorman
2018-12-05 0:47 ` [LKP] " David Rientjes
2018-12-05 0:47 ` David Rientjes
2018-12-05 9:08 ` [LKP] " Michal Hocko
2018-12-05 9:08 ` Michal Hocko
2018-12-05 10:43 ` [LKP] " Mel Gorman
2018-12-05 10:43 ` Mel Gorman
2018-12-05 11:43 ` [LKP] " Michal Hocko
2018-12-05 11:43 ` Michal Hocko
2018-12-05 10:06 ` [LKP] " Mel Gorman
2018-12-05 10:06 ` Mel Gorman
2018-12-05 20:40 ` [LKP] " Andrea Arcangeli
2018-12-05 20:40 ` Andrea Arcangeli
2018-12-05 21:59 ` [LKP] " David Rientjes
2018-12-05 21:59 ` David Rientjes
2018-12-06 0:00 ` [LKP] " Andrea Arcangeli
2018-12-06 0:00 ` Andrea Arcangeli
2018-12-05 22:03 ` [LKP] " Linus Torvalds
2018-12-05 22:03 ` Linus Torvalds
2018-12-05 22:12 ` [LKP] " David Rientjes
2018-12-05 22:12 ` David Rientjes
2018-12-05 23:36 ` [LKP] " Andrea Arcangeli
2018-12-05 23:36 ` Andrea Arcangeli
2018-12-05 23:51 ` [LKP] " Linus Torvalds
2018-12-05 23:51 ` Linus Torvalds
2018-12-06 0:58 ` [LKP] " Linus Torvalds
2018-12-06 0:58 ` Linus Torvalds
2018-12-06 9:14 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression) Michal Hocko
2018-12-06 9:14 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-06 23:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " David Rientjes
2018-12-06 23:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: " David Rientjes
2018-12-07 7:34 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Michal Hocko
2018-12-07 7:34 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-07 4:31 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Linus Torvalds
2018-12-07 4:31 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Linus Torvalds
2018-12-07 7:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Michal Hocko
2018-12-07 7:49 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Michal Hocko
2018-12-07 9:06 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " Vlastimil Babka
2018-12-07 9:06 ` MADV_HUGEPAGE vs. NUMA semantic (was: " Vlastimil Babka
2018-12-07 23:15 ` MADV_HUGEPAGE vs. NUMA semantic (was: Re: [LKP] " David Rientjes
2018-12-07 23:15 ` MADV_HUGEPAGE vs. NUMA semantic (was: " David Rientjes
2018-12-06 23:43 ` [LKP] [mm] ac5b2c1891: vm-scalability.throughput -61.3% regression David Rientjes
2018-12-06 23:43 ` David Rientjes
2018-12-07 4:01 ` [LKP] " Linus Torvalds
2018-12-07 4:01 ` Linus Torvalds
2018-12-10 0:29 ` [LKP] " David Rientjes
2018-12-10 0:29 ` David Rientjes
2018-12-10 4:49 ` [LKP] " Andrea Arcangeli
2018-12-10 4:49 ` Andrea Arcangeli
2018-12-12 0:37 ` [LKP] " David Rientjes
2018-12-12 0:37 ` David Rientjes
2018-12-12 9:50 ` [LKP] " Michal Hocko
2018-12-12 9:50 ` Michal Hocko
2018-12-12 17:00 ` [LKP] " Andrea Arcangeli
2018-12-12 17:00 ` Andrea Arcangeli
2018-12-14 11:32 ` Michal Hocko [this message]
2018-12-14 11:32 ` Michal Hocko
2018-12-12 10:14 ` [LKP] " Vlastimil Babka
2018-12-12 10:14 ` Vlastimil Babka
2018-12-14 21:04 ` [LKP] " David Rientjes
2018-12-14 21:04 ` David Rientjes
2018-12-14 21:33 ` [LKP] " Vlastimil Babka
2018-12-14 21:33 ` Vlastimil Babka
2018-12-21 22:18 ` [LKP] " David Rientjes
2018-12-21 22:18 ` David Rientjes
2018-12-21 22:18 ` [LKP] " David Rientjes
2018-12-22 12:08 ` Mel Gorman
2018-12-22 12:08 ` Mel Gorman
2018-12-14 23:11 ` [LKP] " Mel Gorman
2018-12-14 23:11 ` Mel Gorman
2018-12-21 22:15 ` [LKP] " David Rientjes
2018-12-21 22:15 ` David Rientjes
2018-12-12 10:44 ` [LKP] " Andrea Arcangeli
2018-12-12 10:44 ` Andrea Arcangeli
2019-04-15 11:48 ` [LKP] " Michal Hocko
2019-04-15 11:48 ` Michal Hocko
2018-12-06 0:18 ` [LKP] " David Rientjes
2018-12-06 0:18 ` David Rientjes
2018-12-06 0:54 ` [LKP] " Andrea Arcangeli
2018-12-06 0:54 ` Andrea Arcangeli
2018-12-06 9:23 ` [LKP] " Vlastimil Babka
2018-12-06 9:23 ` Vlastimil Babka
2018-12-03 20:39 ` [LKP] " David Rientjes
2018-12-03 20:39 ` David Rientjes
2018-12-03 21:25 ` [LKP] " Michal Hocko
2018-12-03 21:25 ` Michal Hocko
2018-12-03 21:53 ` [LKP] " David Rientjes
2018-12-03 21:53 ` David Rientjes
2018-12-04 8:48 ` [LKP] " Michal Hocko
2018-12-04 8:48 ` Michal Hocko
2018-12-05 0:07 ` [LKP] " David Rientjes
2018-12-05 0:07 ` David Rientjes
2018-12-05 10:18 ` [LKP] " Michal Hocko
2018-12-05 10:18 ` Michal Hocko
2018-12-05 19:16 ` [LKP] " David Rientjes
2018-12-05 19:16 ` David Rientjes
2018-11-27 7:23 [LKP] " kernel test robot
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