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Shutemov" To: Zi Yan Cc: akpm@linux-foundation.org, Andrea Arcangeli , Yang Shi , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: Re: [PATCHv2 1/8] khugepaged: Add self test Message-ID: <20200406152035.ga7hk6jfaqzvlete@box> References: <20200403112928.19742-1-kirill.shutemov@linux.intel.com> <20200403112928.19742-2-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000411, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Apr 06, 2020 at 10:59:52AM -0400, Zi Yan wrote: > I ran this test with all patches from this series applied to Linus=E2=80= =99s > tree, but still see several failures. Is it expected? [Thanks for catching all my typos] No. It works fine for me. Well, occasionally, it fails to swap out a page, but nothing like you hav= e here. Could you try to trace it? I used script like below after mounting tracefs. You may want to comment out all tests but a failing one. #!/bin/sh -efu echo > /sys/kernel/tracing/trace echo 1 > /sys/kernel/tracing/events/huge_memory/enable while ./khugepaged; do echo > /sys/kernel/tracing/trace done cat /sys/kernel/tracing/trace --=20 Kirill A. Shutemov