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[109.81.16.57]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-46fb55ac08dsm217399135e9.13.2025.10.14.00.26.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 00:26:50 -0700 (PDT) Date: Tue, 14 Oct 2025 09:26:49 +0200 From: Michal Hocko To: Vlastimil Babka Cc: Barry Song <21cnbao@gmail.com>, netdev@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Barry Song , Jonathan Corbet , Eric Dumazet , Kuniyuki Iwashima , Paolo Abeni , Willem de Bruijn , "David S. Miller" , Jakub Kicinski , Simon Horman , Suren Baghdasaryan , Brendan Jackman , Johannes Weiner , Zi Yan , Yunsheng Lin , Huacai Zhou , Alexei Starovoitov , Harry Yoo , David Hildenbrand , Matthew Wilcox , Roman Gushchin Subject: Re: [RFC PATCH] mm: net: disable kswapd for high-order network buffer allocation Message-ID: References: <20251013101636.69220-1-21cnbao@gmail.com> <927bcdf7-1283-4ddd-bd5e-d2e399b26f7d@suse.cz> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <927bcdf7-1283-4ddd-bd5e-d2e399b26f7d@suse.cz> On Mon 13-10-25 20:30:13, Vlastimil Babka wrote: > On 10/13/25 12:16, Barry Song wrote: > > From: Barry Song [...] > I wonder if we should either: > > 1) sacrifice a new __GFP flag specifically for "!allow_spin" case to > determine it precisely. As said in other reply I do not think this is a good fit for this specific case as it is all or nothing approach. Soon enough we discover that "no effort to reclaim/compact" hurts other usecases. So I do not think we need a dedicated flag for this specific case. We need a way to tell kswapd/kcompactd how much to try instead. -- Michal Hocko SUSE Labs