From: Matthew Wilcox <willy@infradead.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Mike Snitzer <snitzer@kernel.org>,
Jens Axboe <axboe@kernel.dk>,
Ritesh Harjani <ritesh.list@gmail.com>,
Christoph Hellwig <hch@infradead.org>,
Kairui Song <kasong@tencent.com>, Qi Zheng <qi.zheng@linux.dev>,
Shakeel Butt <shakeel.butt@linux.dev>,
Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Chuck Lever <chuck.lever@oracle.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-mm@kvack.org,
linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/4] mm: kick writeback flusher for IOCB_DONTCACHE with targeted dirty tracking
Date: Sun, 26 Apr 2026 21:44:35 +0100 [thread overview]
Message-ID: <ae55M8xBIVYZXPFN@casper.infradead.org> (raw)
In-Reply-To: <20260426-dontcache-v3-2-79eb37da9547@kernel.org>
On Sun, Apr 26, 2026 at 07:56:08AM -0400, Jeff Layton wrote:
> Mixed-mode noisy neighbor (dontcache writer + buffered readers):
> baseline patched change
> writer (MB/s) 1297.6 1471.1 +13.4%
> readers avg (MB/s) 855.0 462.4 -45.9%
hm. This wasn't what I thought of when I thought of "noisy neighbour".
I'd have process A doing DONTCACHE writes to file A and process B doing
normal buffered writes to file B.
next prev parent reply other threads:[~2026-04-26 20:44 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-26 11:56 [PATCH v3 0/4] mm: improve write performance with RWF_DONTCACHE Jeff Layton
2026-04-26 11:56 ` [PATCH v3 1/4] mm: add NR_DONTCACHE_DIRTY node page counter Jeff Layton
2026-04-26 11:56 ` [PATCH v3 2/4] mm: kick writeback flusher for IOCB_DONTCACHE with targeted dirty tracking Jeff Layton
2026-04-26 12:28 ` Andrew Morton
2026-04-26 14:05 ` Jeff Layton
2026-04-26 18:25 ` Jeff Layton
2026-04-26 20:44 ` Matthew Wilcox [this message]
2026-04-27 10:51 ` Jeff Layton
2026-04-26 22:31 ` Ritesh Harjani
2026-04-27 10:44 ` Jeff Layton
2026-04-27 23:26 ` Ritesh Harjani
2026-04-28 6:49 ` Jeff Layton
2026-04-27 12:46 ` Jan Kara
2026-04-26 11:56 ` [PATCH v3 3/4] testing: add nfsd-io-bench NFS server benchmark suite Jeff Layton
2026-04-26 12:34 ` Andrew Morton
2026-04-26 14:11 ` Jeff Layton
2026-04-26 23:54 ` Ritesh Harjani
2026-04-26 11:56 ` [PATCH v3 4/4] testing: add dontcache-bench local filesystem " Jeff Layton
2026-04-26 19:02 ` [syzbot ci] Re: mm: improve write performance with RWF_DONTCACHE syzbot ci
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