From: Matthew Wilcox <willy@infradead.org>
To: Yibin Liu <liuyibin@hygon.cn>
Cc: Lorenzo Stoakes <ljs@kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"Liam.Howlett@oracle.com" <Liam.Howlett@oracle.com>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"brauner@kernel.org" <brauner@kernel.org>,
"mjguzik@gmail.com" <mjguzik@gmail.com>,
Jianyong Wu <wujianyong@hygon.cn>, Huangsj <huangsj@hygon.cn>,
Yuan Zhong <zhongyuan@hygon.cn>, "jack@suse.cz" <jack@suse.cz>,
"jlayton@kernel.org" <jlayton@kernel.org>,
"chuck.lever@oracle.com" <chuck.lever@oracle.com>,
"alex.aring@gmail.com" <alex.aring@gmail.com>,
"vbabka@kernel.org" <vbabka@kernel.org>,
"jannh@google.com" <jannh@google.com>,
"pfalcato@suse.de" <pfalcato@suse.de>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: 答复: 答复: [PATCH] mm: Add RWH_RMAP_EXCLUDE flag to exclude files from rmap sharing
Date: Fri, 24 Apr 2026 04:20:39 +0100 [thread overview]
Message-ID: <aerhh_tzSs5XapUz@casper.infradead.org> (raw)
In-Reply-To: <a96c20b74b874248bc0cdc2b926a43fe@hygon.cn>
On Fri, Apr 24, 2026 at 01:08:35AM +0000, Yibin Liu wrote:
> On an Intel Emerald Rapids server (112 cores), run the execl benchmark from
> UnixBench with the command: ./Run -c 220 execl
> Then perf top shows:
>
> 91.53% [kernel] [k] osq_lock
> 0.50% [kernel] [k] rwsem_spin_on_owner
OK, but does this represent a realistic workload? It's pretty easy to
construct workloads that hammer on particular locks; the question is
whether it's a relevant performance bottleneck that customers care about.
next prev parent reply other threads:[~2026-04-24 3:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-21 2:09 [PATCH] mm: Add RWH_RMAP_EXCLUDE flag to exclude files from rmap sharing Yibin Liu
2026-04-21 14:38 ` Matthew Wilcox
2026-04-21 15:37 ` Pedro Falcato
2026-04-22 7:19 ` David Hildenbrand (Arm)
2026-04-21 19:46 ` Mateusz Guzik
2026-04-22 13:03 ` 答复: " Yibin Liu
2026-04-22 10:49 ` Lorenzo Stoakes
2026-04-22 12:51 ` 答复: " Yibin Liu
2026-04-22 16:16 ` Lorenzo Stoakes
2026-04-24 1:08 ` 答复: " Yibin Liu
2026-04-24 3:20 ` Matthew Wilcox [this message]
2026-04-24 6:20 ` Mateusz Guzik
2026-04-24 6:54 ` Mateusz Guzik
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