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Mon, 23 Mar 2026 01:53:56 -0700 (PDT) Received: from redhat.com ([209.132.188.88]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c743a7ff529sm7219812a12.2.2026.03.23.01.53.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Mar 2026 01:53:56 -0700 (PDT) Date: Mon, 23 Mar 2026 16:53:53 +0800 From: Li Wang To: Waiman Long Cc: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , Tejun Heo , Michal =?utf-8?Q?Koutn=C3=BD?= , Shuah Khan , Mike Rapoport , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Sean Christopherson , James Houghton , Sebastian Chlad , Guopeng Zhang , Li Wang Subject: Re: [PATCH v2 6/7] selftests: memcg: Don't call reclaim_until() if already in target Message-ID: References: <20260320204241.1613861-1-longman@redhat.com> <20260320204241.1613861-7-longman@redhat.com> Precedence: bulk X-Mailing-List: linux-kselftest@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: <20260320204241.1613861-7-longman@redhat.com> On Fri, Mar 20, 2026 at 04:42:40PM -0400, Waiman Long wrote: > Near the end of test_memcg_protection(), reclaim_until() is called > to reduce memory.current of children[0] to 10M. It was found that > with larger page size (e.g. 64k) the various memory cgroups in > test_memcg_protection() would deviate further from the expected values > especially for the test_memcg_low test. As a result, children[0] might > have reached the target already without reclamation. The will cause the > reclaim_until() function to report failure as no reclamation is needed. > > Avoid this unexpected failure by skipping the reclaim_until() call if > memory.current of children[0] has already reached the target size for > kernel with non-4k page size. > > Signed-off-by: Waiman Long Reviewed-by: Li Wang -- Regards, Li Wang