From: Christoph Hellwig <hch@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>,
Jeff Layton <jlayton@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
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>,
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
Subject: Re: [PATCH v2 1/3] mm: kick writeback flusher instead of inline flush for IOCB_DONTCACHE
Date: Thu, 9 Apr 2026 07:21:22 -0700 [thread overview]
Message-ID: <ade14lOI1CDiraar@infradead.org> (raw)
In-Reply-To: <gpcc6t5unsoepakjdffsmnmd5duuvijxwdochd753ttix75h7l@nahwzi4qfdcq>
On Thu, Apr 09, 2026 at 09:21:36AM +0200, Jan Kara wrote:
> > So I think you'll want a new WB_start_dontcache bit, a new
> > get_nr_dontcache_pages() helper on a new node counter, etc.
>
> But I'm not sure how you imagine this would work without restricting
> writeback to particular inodes. Maybe we could mark inodes which have
> folios with dropbehind set and make flush worker only write such inodes?
I'd only expedite writing by the number of pending dontcache folios.
It would still write the least recently dirtied inodes.
next prev parent reply other threads:[~2026-04-09 14:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-08 14:25 [PATCH v2 0/3] mm: improve write performance with RWF_DONTCACHE Jeff Layton
2026-04-08 14:25 ` [PATCH v2 1/3] mm: kick writeback flusher instead of inline flush for IOCB_DONTCACHE Jeff Layton
2026-04-09 1:40 ` Ritesh Harjani
2026-04-09 5:52 ` Christoph Hellwig
2026-04-09 5:50 ` Christoph Hellwig
2026-04-09 7:21 ` Jan Kara
2026-04-09 14:21 ` Christoph Hellwig [this message]
2026-04-08 14:25 ` [PATCH v2 2/3] testing: add nfsd-io-bench NFS server benchmark suite Jeff Layton
2026-04-08 14:25 ` [PATCH v2 3/3] testing: add dontcache-bench local filesystem " Jeff Layton
2026-04-08 18:45 ` [PATCH v2 0/3] mm: improve write performance with RWF_DONTCACHE Jeff Layton
2026-04-09 6:06 ` Christoph Hellwig
2026-04-09 6:05 ` Christoph Hellwig
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