From nobody Wed Sep 17 10:38:34 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D478C4332F for ; Thu, 22 Dec 2022 04:20:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235123AbiLVEUz (ORCPT ); Wed, 21 Dec 2022 23:20:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234968AbiLVETy (ORCPT ); Wed, 21 Dec 2022 23:19:54 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37E2C22BDD for ; Wed, 21 Dec 2022 20:19:53 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-4528903f275so9657567b3.8 for ; Wed, 21 Dec 2022 20:19:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=wqbMgd0zowymzGskr7701SDcBxSEYhpmKyp2L4CmwQc=; b=FaAk0+IovKrA30gqzGnUXCgvxnAEqM9RNUrx6/qbk2dXbMev+aX6+TBCBI++qJqoJh DHNBFkCo27K0mtm3kCypi0Ii7FLQEyOoUcXG+t83h3xzdMvkNUCkZTP8OrqRsYYWm0el eWwdtsGBlfK8BfaDX27IjQxVLcqXb9rSOW0ntCxNjAM2Cim1CHaEVKSL6BfOAxE/zGHv zshIYCJIZ+wR/JAB7hswAHRV8jE3CLxEuhhNl1iaGkZYIJeIjSv9yuHWpAemQnptTj9G AsAn5TBRtcqHkkCAS4JOx0xwOehAeuT/Kj0REFHOiEd6bNs1NdquJnCAzj9joH3GCGp1 aNTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=wqbMgd0zowymzGskr7701SDcBxSEYhpmKyp2L4CmwQc=; b=DJmZpvGwa47fRGOzxcJH+2hrKMiv0YdQEb71x6ZA7TSFsF+0xjuzQBUvnooT5f2glg HM2yB4RxSZlqNmpHr5i96rt6Qf0Yb7CUqjIm3rMXPoPKR5i+PqAQNvl5aP0u0thHwnYv 5Gx3DevBaLYOsBv2Qo4GbmKl4zsakG2ZNZzyBiKu/vsMZ0YHFOdteIC6nqrW5qpIy6Qg JogTScz5mwFddghFY61R8nS8/ddEqmqi5446jsKcuMi112p+zP3bgMRop6XLuRfJHl5n leBT0yvrOmOjdez7ANHw1jLBpTKWJNuehOCNTjo8IwCO2/lnft4q4fwapWy8GLeDdvlA iZtg== X-Gm-Message-State: AFqh2kpA3abPB+h8sl0o3cc3KOKrzSF32JkUOPpVvu/pSYLvJ5t6LZIn EIsLKJqpWEWs2LgAfqo7ciU/4Ahoc9Y= X-Google-Smtp-Source: AMrXdXtoQV2nYQsCRHGYe9z8m7Uo+pjFU+YdC4C/Y+Mib9s2WlE6ZwrTFMZkcNSCiAcHyEFs+f2bQg5UyD0= X-Received: from yuzhao.bld.corp.google.com ([2620:15c:183:200:a463:5f7b:440e:5c77]) (user=yuzhao job=sendgmr) by 2002:a25:3c85:0:b0:6dc:b9ec:7c87 with SMTP id j127-20020a253c85000000b006dcb9ec7c87mr460947yba.322.1671682792499; Wed, 21 Dec 2022 20:19:52 -0800 (PST) Date: Wed, 21 Dec 2022 21:19:06 -0700 In-Reply-To: <20221222041905.2431096-1-yuzhao@google.com> Message-Id: <20221222041905.2431096-9-yuzhao@google.com> Mime-Version: 1.0 References: <20221222041905.2431096-1-yuzhao@google.com> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog Subject: [PATCH mm-unstable v3 8/8] mm: multi-gen LRU: simplify arch_has_hw_pte_young() check From: Yu Zhao To: Andrew Morton Cc: Johannes Weiner , Jonathan Corbet , Michael Larabel , Michal Hocko , Mike Rapoport , Roman Gushchin , Suren Baghdasaryan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mm@google.com, Yu Zhao Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Scanning page tables when hardware does not set the accessed bit has no real use cases. Signed-off-by: Yu Zhao --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index a9b318e1bdc2..71d13c969b52 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -4428,7 +4428,7 @@ static bool try_to_inc_max_seq(struct lruvec *lruvec,= unsigned long max_seq, * handful of PTEs. Spreading the work out over a period of time usually * is less efficient, but it avoids bursty page faults. */ - if (!force_scan && !(arch_has_hw_pte_young() && get_cap(LRU_GEN_MM_WALK))= ) { + if (!arch_has_hw_pte_young() || !get_cap(LRU_GEN_MM_WALK)) { success =3D iterate_mm_list_nowalk(lruvec, max_seq); goto done; } --=20 2.39.0.314.g84b9a713c41-goog