From: Michal Hocko <mhocko@kernel.org>
To: Feng Tang <feng.tang@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Matthew Wilcox <willy@infradead.org>,
Mel Gorman <mgorman@suse.de>, Kees Cook <keescook@chromium.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Iurii Zaikin <yzaikin@google.com>,
andi.kleen@intel.com, tim.c.chen@intel.com,
dave.hansen@intel.com, ying.huang@intel.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] mm: adjust vm_committed_as_batch according to vm overcommit policy
Date: Fri, 15 May 2020 09:44:43 +0200 [thread overview]
Message-ID: <20200515074443.GI29153@dhcp22.suse.cz> (raw)
In-Reply-To: <1588922717-63697-4-git-send-email-feng.tang@intel.com>
On Fri 08-05-20 15:25:17, Feng Tang wrote:
> When checking a performance change for will-it-scale scalability
> mmap test [1], we found very high lock contention for spinlock of
> percpu counter 'vm_committed_as':
Btw. you are focusing on a microbenchmark here but I believe that there
are non-synthetic worklaods which would benefit from a larger batch.
E.g. large in memory databases which do large mmaps during startups
from multiple threads.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2020-05-15 7:44 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 7:25 [PATCH 0/3] make vm_committed_as_batch aware of vm overcommit policy Feng Tang
2020-05-08 7:25 ` [PATCH 1/3] proc/meminfo: avoid open coded reading of vm_committed_as Feng Tang
2020-05-15 7:22 ` Michal Hocko
2020-05-08 7:25 ` [PATCH 2/3] mm/util.c: make vm_memory_committed() more accurate Feng Tang
2020-05-15 7:23 ` Michal Hocko
2020-05-15 8:11 ` Feng Tang
2020-05-15 9:04 ` Michal Hocko
2020-05-15 13:01 ` Feng Tang
2020-05-08 7:25 ` [PATCH 3/3] mm: adjust vm_committed_as_batch according to vm overcommit policy Feng Tang
2020-05-08 11:24 ` Matthew Wilcox
2020-05-08 12:33 ` Feng Tang
2020-05-15 7:41 ` Michal Hocko
2020-05-15 8:02 ` Feng Tang
2020-05-15 9:08 ` Michal Hocko
2020-05-15 11:26 ` Feng Tang
2020-05-15 7:44 ` Michal Hocko [this message]
2020-05-15 8:38 ` Feng Tang
2020-05-21 21:27 ` [PATCH 0/3] make vm_committed_as_batch aware of " Qian Cai
2020-05-26 18:14 ` Qian Cai
2020-05-27 1:14 ` Andi Kleen
2020-05-27 1:43 ` Feng Tang
2020-05-27 1:46 ` Feng Tang
2020-05-27 2:25 ` Qian Cai
2020-05-27 10:46 ` Feng Tang
2020-05-27 12:05 ` Qian Cai
2020-05-27 13:33 ` Feng Tang
2020-05-27 15:42 ` Qian Cai
2020-05-28 14:18 ` Qian Cai
2020-05-28 15:10 ` Feng Tang
2020-05-28 15:21 ` Kleen, Andi
2020-05-29 15:43 ` Feng Tang
2020-05-29 15:50 ` Andi Kleen
2020-05-29 16:04 ` Feng Tang
2020-05-28 15:48 ` Michal Hocko
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