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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Mike Snitzer , Jens Axboe , Chuck Lever , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v2 0/3] mm: improve write performance with RWF_DONTCACHE Message-ID: References: <20260408-dontcache-v2-0-948dec1e756b@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam12 X-Stat-Signature: c96uspq5e3mtbuq4c8zs65qwsqg4jgxb X-Rspamd-Queue-Id: 6454E180008 X-Rspam-User: X-HE-Tag: 1775714813-132096 X-HE-Meta: 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 qUYqYGJm zwAJ2EFPDUfM6hnLXEaagzCZcU4JTHjFQpt0nVg/8+THCScWihR52VJ7x0UEjx3fodiCC7/mt8M1t1lNYanxQHmPzdDw9gr7JpNQ4IXJazvcFxIm2juux/gxYLXjuSTi7DABDeYfVfN92I4tGITUJSsu/JsDRLXgBvgsX/VTknsG3LdoLiMzRjuN/Ven8lBcMdbrL+9C2FMDGC/gCJ2za4m/c6J4at3pCpPjugqlwPbfDjOQiYhpmFGhldyjofr70hsmz Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Apr 08, 2026 at 02:45:32PM -0400, Jeff Layton wrote: > > Assuming that looks OK, I'll probably send a v3. Original cover letter > > from v1 follows: > > > > Actually, that version regressed performance in a couple of cases. > I think v2 is probably the best approach, on balance. Limiting writeback to a specific inode has many downsides as I explained before, so this is not surprising. > Maybe we can get this into -next so that it can make v7.2? If you want to target 7.2 we're not in any rush. If you were trying to say 7.1 we're way to close too the merge window. We also haven't heard from Jens at all, whom I'd really like to look over this.