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Thu, 14 Aug 2025 07:15:14 -0700 (PDT) Date: Thu, 14 Aug 2025 10:15:13 -0400 From: Johannes Weiner To: Ye Liu Cc: Andrew Morton , Vlastimil Babka , Ye Liu , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Zi Yan , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/show_mem: Print totalreserve_pages in show_mem output Message-ID: <20250814141513.GG115258@cmpxchg.org> References: <20250814092622.24535-1-ye.liu@linux.dev> 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=us-ascii Content-Disposition: inline In-Reply-To: <20250814092622.24535-1-ye.liu@linux.dev> On Thu, Aug 14, 2025 at 05:26:21PM +0800, Ye Liu wrote: > From: Ye Liu > > Add totalreserve_pages to the main show_mem output line for easier > debugging and memory analysis. This helps developers and > administrators quickly see how many pages are reserved by the kernel > and not available for user allocations. This number isn't used very widely in decision making. For actual allocations, what matters is watermarks, lowmem_reserve, highatomic, and cma pages - all of which are already printed out on a per-zone basis in show_mem().