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[58.152.22.206]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2aece81cde8sm125397245ad.70.2026.03.16.19.16.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Mar 2026 19:16:40 -0700 (PDT) Date: Tue, 17 Mar 2026 10:16:34 +0800 From: Vernon Yang To: Andrew Morton Cc: Barry Song <21cnbao@gmail.com>, david@kernel.org, lorenzo.stoakes@oracle.com, ziy@nvidia.com, dev.jain@arm.com, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang Subject: Re: [PATCH mm-new v8 4/4] mm: khugepaged: skip lazy-free folios Message-ID: <4d0f3f68-0549-476e-bdee-761045b5759f@gmail.com> References: <20260221093918.1456187-1-vernon2gm@gmail.com> <20260221093918.1456187-5-vernon2gm@gmail.com> <20260316124157.bfc7e00976c22bc028913945@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260316124157.bfc7e00976c22bc028913945@linux-foundation.org> On Mon, Mar 16, 2026 at 12:41:57PM -0700, Andrew Morton wrote: > On Thu, 26 Feb 2026 15:55:45 +0800 Vernon Yang wrote: > > > Hi Andrew, could you please squash the following fix into this patch? > > yup. > > > also remove "if" in the changelog above. > > So you want it like this? Yes, we should remove the "if"; otherwise, it’s misleading. > : All folios in VM_DROPPABLE are lazyfree, Collapsing maintains that > : property, so we can just collapse and memory pressure in the future will > : free it up. In contrast, collapsing in !VM_DROPPABLE does not maintain > : that property, the collapsed folio will not be lazyfree and memory > : pressure in the future will not be able to free it up. > LGTM, Thanks! -- Cheers, Vernon