From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792805147; b=vHxDoXprC2BAGryXq/0ceQRo+FKkjn4FzaAJnHMll3ptSIXFiwsj8oXk5aB67InKSnKs DV123PjzQPFDj7ChcMU+7TgRrvf+TXUy0aCEpuadqZYoLCFrRHrFZW2+rX3FHg/QCb0/t JMAabgXzJ0lSTnN4tP633044tFxE3n8IIxSb88Xau1bjsZb/fk8ikthzk1EMup/mi1JAz 0tgPdefNEghebix3zsSU2uj06lu9H5PY7zop6q5sR2VtfPUFTRLwpbNsV0ACqEqTvQMbp D05Ig+NVeiA6KPTqR63e4c4Wq4TL60xcjet85JjL833g4Kvrc3/jSuO/DkZyqpT/XIQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792805147; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=wbjDH2XGRGAyB1Jgh8Mq6npQkQrEQtHcwNp3x4kkvmY=; b=WaeY2cTFwgaxThlzoaEqw0mV0idSOnmP3LmbH0ZuBpdApQk9EksNHmqHS/WWczd9m1j8 0US1uoO6CXiig3jbZm/m8A57hLTqfAKBeYrdV+WZ4dhM40NlM9ud5pvXfRjhG1gRmh1q+ mJdpVcsSK9wqA4mIXKt5dS27WmecqHfeZaZdgsNidwQ2BSZZbeSeBCfTou9eleKLvDFNT QrBEjBgWONosO/t9S+cN35WHaN7C39IvUCLyaMOPKTeQXLej0tQBvTcTsoeOBT0fw/MUk nJyVZ7JNgKSWN6pM3TXL6tF4wNX8OuajBuybUvMicMhycpbE/iQMD5zpVwm2Qq1I8zg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="nFJ/Q0Zg"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1AB6606A31A; Sat, 24 Oct 2026 01:25:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=nFJ/Q0Zg Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5CA11F01825; Sat, 24 Oct 2026 01:25:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792805147; bh=wbjDH2XGRGAyB1Jgh8Mq6npQkQrEQtHcwNp3x4kkvmY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nFJ/Q0ZgIzG50WO/AI1/5yODoNQj7ueXInuMSDgVRCkvcZuqgZyA+wItoQ+lRHXid 3ZbWaTENm+BgSkvdsFyXdhu1QvyUsNNYcu3lpNBnR7fGH1p20yKHKo/PsDi8eGAfuf rvQ9qJ2a6MFod7iy42qyBxhTnwHW3deIUxQFTYcgFBlo53xiwUv64EH5fF++rRIBUm zmkf6b3FK+R5D2uJ+pfO0nqXewuq3OU0rK76J1cIBqvrXfjUBp54kL0Lk85gS4tAEf 64M6g5UaEFIvLzlCOBx1Xqm+YI2WF7q8gnR7VnRrIPew2Hz2g85yrxEY3NjbR4KsEA AKbZva0DwYzaQ== From: SJ Park To: Aveline Noir Cc: SJ Park , Andrew Morton , Shubhang Kaushik , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Fernand Sieber , Leonard Foerster , SeongJae Park , Shakeel Butt , Shubhang Kaushik , Christoph Lameter Subject: Re: [PATCH] mm/damon: align MMU notifier range when clearing PMD young bit Date: Fri, 23 Oct 2026 18:25:39 -0700 Message-ID: <20261024012540.89397-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <179273169185.2.1655708299473876346.damon-pmd-kvm-reply-draft@gmail.com> References: 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-Transfer-Encoding: 8bit On Fri, 23 Oct 2026 13:01:31 +0800 Aveline Noir wrote: > Hi SJ, > > On Thu, 22 Oct 2026 17:20:17 -0700 SJ Park wrote: > > I Cc-ed them. Please Cc all > > recipients who get_maitnainer.pl is recommending, from the next time. > > Sorry for that. Maybe I will use b4 next time :) > > > However, I think this patch explains its context very well, and therefore > > this link is not needed. > > Sure , That make sense. > > > Were you also able to confirm the expected wrong behavior (missing part > > of the sampled huge page and age secondary mapping), too? > > Yes. A test with nested x86-64 KVM confirmed both effects. With > 4 KiB EPT mappings, a midpoint PMD sample left the first 1 MiB young and > aged the next THP's first 1 MiB. With 2 MiB EPT mappings, both whole THPs > were aged. After the fix, only the sampled THP was aged in both cases. Thank you for confirming! Thanks, SJ [...]