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Howlett" , Michal Hocko , Ryan Roberts , Shuah Khan , Suren Baghdasaryan , "Vlastimil Babka (SUSE)" , Alexander Gordeev , Jason Gunthorpe , Leon Romanovsky , kernel-team@meta.com Subject: Re: [PATCH v6 16/19] selftests/mm: add khugepaged race harness Message-ID: References: <20260919002451.496763-1-kirill@shutemov.name> <20260919002451.496763-17-kirill@shutemov.name> <85b3725a-6dde-4a57-b303-4ae2b53b60a5@linux.dev> <6e3c298f-9b93-43b2-840d-65c5ffa3bc36@arm.com> <248431ea-4bbf-4a48-a80e-72287ffbae22@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <248431ea-4bbf-4a48-a80e-72287ffbae22@linux.dev> On Thu, Oct 08, 2026 at 10:23:22PM +0800, Zenghui Yu wrote: > On 10/8/26 4:18 PM, Muhammad Usama Anjum wrote: > > > On 08/10/2026 8:30 am, Zenghui Yu wrote: > > > On 9/19/26 8:24 AM, Kiryl Shutsemau wrote: > > > > > > > + } else { /* madvise */ > > > > + while (now_ms() < end_ms && !corrupted) { > > > > + for (i = 0; i < nr_shared_areas; i++) { > > > > + madvise(region + i * hpage_pmd_size, > > > > + hpage_pmd_size, MADV_COLLAPSE); > > > > > > I got the following error when compiling it: > > > > > > khugepaged_race.c: In function ‘main’: > > > khugepaged_race.c:506:23: error: ‘MADV_COLLAPSE’ undeclared (first use in this function); did you mean ‘MADV_COLD’? > > > 506 | hpage_pmd_size, MADV_COLLAPSE); > > > | ^~~~~~~~~~~~~ > > > | MADV_COLD > > > khugepaged_race.c:506:23: note: each undeclared identifier is reported only once for each function it appears in > > > make: *** [../lib.mk:225: /data/code/mm/tools/testing/selftests/mm/khugepaged_race] Error 1 > > > > I've just tested with and without make headers on linux-next > > which has this patch and I've not received such error. > > > > If your system headers are old, running make headers can help. > > I forgot to mention that this can be fixed like fd5295afae91. Right. Would you like to send the fix? -- Kiryl Shutsemau / Kirill A. Shutemov