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Fri, 07 Aug 2026 08:33:04 -0700 (PDT) Date: Fri, 7 Aug 2026 08:33:02 -0700 (PDT) From: David Rientjes To: Andrew Morton , David Hildenbrand , Christoph Lameter cc: Vlastimil Babka , Mathieu Desnoyers , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [patch v2] lib: test_vmstat: add synthetic benchmark for vm stats In-Reply-To: <94068447-f9c5-ba84-73be-bf492277b9b3@google.com> Message-ID: References: <94068447-f9c5-ba84-73be-bf492277b9b3@google.com> 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 On Sun, 2 Aug 2026, David Rientjes wrote: > From: Christoph Lameter > > Add a synthetic benchmark that can be used to measure performance of VM > statistics. This is used to analyze any improvements or regressions in > functions that are frequently used in hot code paths. > > The test is run by inserting the module: modprobe test_vmstat > The module insertion will always fail so that it is automatically > unloaded; the results are in the kernel log. > > Signed-off-by: Christoph Lameter > Signed-off-by: David Rientjes > --- > v2: > - added bash wrapper to ksft per David > - integrated into ksft > - added MAINTAINERS entry per David > - fixed alloc_page() error code per Usama > > Adding single test for now to solicit feedback before updating the other > two. > Any feedback for this one? If this one looks good then I can also apply the same treatment for test_pagealloc and test_slab.