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a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1793276236; b=YjYg3FeIXVKjp2b5WU3toyZKRBd+++ODWrHcDyb+VawkJVRrM8TcJ+GQ9HKq3HMjRKJp2u vpMsHx92LI4HUkPn5BWm9IH6dmhIzwrO8K28moHe4scVVh7lDySQYZ3F0fpgDPkzbN5OQb j1VONC69/FqI38pWKjV9webfGbfd1+8= Received: by verein.lst.de (Postfix, from userid 2407) id 6026368BEB; Thu, 29 Oct 2026 13:17:11 +0100 (CET) Date: Thu, 29 Oct 2026 13:17:10 +0100 From: Christoph Hellwig To: Andrew Morton Cc: Christoph Hellwig , Salvatore Dipietro , hannes@cmpxchg.org, abuehaze@amazon.com, alisaidi@amazon.com, blakgeof@amazon.com, brauner@kernel.org, brendan.jackman@linux.dev, david@redhat.com, dgc@kernel.org, dipietro.salvatore@gmail.com, djwong@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, matt@readmodwrite.com, mhocko@suse.com, ritesh.list@gmail.com, rvvandan@amazon.com, stable@vger.kernel.org, surenb@google.com, vbabka@kernel.org, willy@infradead.org, ziy@nvidia.com Subject: Re: [PATCH 1/2] mm: page_alloc: do not give all non-blocking requests reserve access Message-ID: <20261029121710.GB24651@lst.de> References: <20261027150002.318916-1-dipiets@amazon.it> <20261028144148.GA14023@lst.de> <20261028225517.75e13881be22461a8c94e07d@linux-foundation.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028225517.75e13881be22461a8c94e07d@linux-foundation.org> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 9C201C000D X-Stat-Signature: uhm6yf7gb5zfmcnwidzdpxnwq8sxyqch X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=4.0.1 X-Rspam-User: X-HE-Tag: 1793276236-932924 X-HE-Meta: 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 67Bb9OMm CWcf1BJBVc1bRA7yuBPW9MtekG2lPmDD0bc4BVJMaIOPvmo1eRMAt5IvA2k/kcUJ/zLKprLCjX3pIbswiDVuhUS2Fobts5od2+swfSP3GB+R/tKbpC9PUo74QJafoJ0xG1zATXcts8OAGwBdlcY12BzGwoE1PLe0MuEzBnP8N0fTSuMCxBJqG/oUBraVWUdsY2lUqIneebm0/OvtDTTqxWIq9UjANYGeiXh5AxAQc/AKMXRyhs2Ba4/PBjg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, Oct 28, 2026 at 10:55:17PM -0700, Andrew Morton wrote: > > It would be really important to get some fix for this into 7.3. > > We can still perfect it later. > > What is "this"? You're referring to the performance regression which > Salvatore's "mm/page_alloc: avoid direct reclaim and compaction for > costly __GFP_NORETRY allocations" addresses? As in I don't really care how the xfs/iomap performance issue gets fixed, I just want it fixed yesterday.