From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A479C4332F for ; Wed, 27 Oct 2021 07:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0BF66112F for ; Wed, 27 Oct 2021 07:02:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240259AbhJ0HEf (ORCPT ); Wed, 27 Oct 2021 03:04:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231686AbhJ0HEe (ORCPT ); Wed, 27 Oct 2021 03:04:34 -0400 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37458C061570 for ; Wed, 27 Oct 2021 00:02:09 -0700 (PDT) Received: by mail-pg1-x536.google.com with SMTP id h193so2051028pgc.1 for ; Wed, 27 Oct 2021 00:02:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id; bh=wwE2Hfzwdmr3TCQqN87hY4IbZDmFo48GQs2vJluyNr8=; b=L+95XKbsyzJZ9UxJUblna4RTYBsM9DsQoMnTnjhBYmUWt4IMAvkG+zyV+LB20PZ8Ti JCSICZcQmtlh7l8CKjRVnbJGDQu+iPAOh+Bacy8KyWI7qUSppAIVQI4U+JxxnMaFxUvd HmxemA/u0Yr6ajiJwH/8CO/AkSs3K3I1cArr7QPKs0oHrOMQHoSEE4pIUaW1qhzvTbzO aOL7S70vudBgy+Ha/v29FRvToNXaHsXkOwJg5IHJ9iyqvjQEwboIWVj0MxIVu4MXSVWm LhyFJTCN1LrzCNGWObxAYmPX7TEZq3JdkEbAybzjOUXJcYIxHCW7kxpGAl5172cta6OE AUEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id; bh=wwE2Hfzwdmr3TCQqN87hY4IbZDmFo48GQs2vJluyNr8=; b=AnXG2hcldth8C3BXP5FOzdylmy4VUkkUKyFx+xNzUxcBKjRSXzcy83pNuYfCuhU2/W s19D+lgT371wiAuJsy8FkmVZjLZbv3MUqvPC4hYrEV4GydW1Z26Hy527jhN8hMNFsMMJ y1kHQ2lzHp5RlOH1ftfjeoeCJD/8qTvEeaUx7OuuPm1fH2j0A+z/iXIjlp5AD93Ny/zA sF2wkU106lqqjI3+mwxUk2ePs+fS+yR0SJ0AJJAkk2iXhNWFftQKaKYTekIB7v6Zjqrz 317O28BJZ0pMSvbt64Y/+FjepnzthuPUiW7yjFdYdk8sb8kv72mwmHAM5+4S5q/tWdWF nL2w== X-Gm-Message-State: AOAM5303cnKl+jYxdlqA26bkpB+6hux02X9DY1vCmm2MOgn0HUlYyPjW xgYPxRnOwjO34NLZXESaJTo= X-Google-Smtp-Source: ABdhPJxbADh81uQ5ovJtHRsXq8dTtdjiZafRAjh4IJMrAcFlS5Qau4FGozQmKYPeu7wDOvk2sWv2SA== X-Received: by 2002:aa7:9212:0:b0:47b:aefd:2cc4 with SMTP id 18-20020aa79212000000b0047baefd2cc4mr30833466pfo.47.1635318128701; Wed, 27 Oct 2021 00:02:08 -0700 (PDT) Received: from bj03382pcu.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id f8sm3025859pjq.29.2021.10.27.00.02.06 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 27 Oct 2021 00:02:08 -0700 (PDT) From: Huangzhaoyang To: Andrew Morton , Johannes Weiner , Michal Hocko , Vladimir Davydov , Zhaoyang Huang , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH] mm: have kswapd only reclaiming use min protection on memcg Date: Wed, 27 Oct 2021 15:01:50 +0800 Message-Id: <1635318110-1905-1-git-send-email-huangzhaoyang@gmail.com> X-Mailer: git-send-email 1.7.9.5 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zhaoyang Huang For the kswapd only reclaiming, there is no chance to try again on this group while direct reclaim has. fix it by judging gfp flag. Signed-off-by: Zhaoyang Huang --- mm/vmscan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 74296c2..41f5776 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2704,7 +2704,8 @@ static void get_scan_count(struct lruvec *lruvec, struct scan_control *sc, unsigned long protection; /* memory.low scaling, make sure we retry before OOM */ - if (!sc->memcg_low_reclaim && low > min) { + if (!sc->memcg_low_reclaim && low > min + && sc->gfp_mask & __GFP_DIRECT_RECLAIM) { protection = low; sc->memcg_low_skipped = 1; } else { -- 1.9.1