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 4BE1FC433FE for ; Fri, 15 Oct 2021 06:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2862A60F59 for ; Fri, 15 Oct 2021 06:15:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232387AbhJOGR4 (ORCPT ); Fri, 15 Oct 2021 02:17:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232308AbhJOGRy (ORCPT ); Fri, 15 Oct 2021 02:17:54 -0400 Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A2DDC061570 for ; Thu, 14 Oct 2021 23:15:48 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id f11so3625125pfc.12 for ; Thu, 14 Oct 2021 23:15:48 -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=Xt+EtCeoNArQpSpBl66rnuBSnoc3jprqMsF8x7P8yrE=; b=g3JD1trlBvR6kaqIdTE4CNw3T26PTdw1D3d5EbHGPJkPrvkEFC3slZsFmi2PNm/kPn SBHopm0Lp8Si6bebHVabQtIasLQYa4UpLMuZ/K9BHgdmLa4+lp1W1hvQXcG5w5XvRIf8 v9aC7V5SEEtHNoMu8cevOWdwqBCBCWLbW4wNQBzIs9r+ZNp8o6QMVI4UGKaZrAn2rVb0 960tfPst+KO2BiO55qjkSpIwuLSH4Re0MOJIRbUSiqukVVvYp39GehhtfIUiLn2i13bF APD6BANii8ovoy2c1fbYuCshS2k/z4FROQBuRTkDAx8IR6v4EjXc0Pen2uii+u9GCmvM DRWw== 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=Xt+EtCeoNArQpSpBl66rnuBSnoc3jprqMsF8x7P8yrE=; b=uqb74To9ksIEKwSGuJxzITrAbroAK6qkwP0dqN220Z+AySyllcVfyJLex/NP9EAi1b Qh8ddM972izhEPHZOHp7UR2YjarY62fY5vzXVQS5fTU6+r/h6huu1f4nuw6TIEVeDU2n oq7/Bn8xrO56ObH+jJP3uigz8BsNPvQQGeYmXKQzzYkzqKxGJ3/VK/VYVkMMjib4VcNQ CXg72jD+c/tMr3l/NPGmKG8/sG6lSbW1Fd1y2aAxrNgSr02XIKVcDGJNOkI9D8WZsquh shUyVACcHFhFYkNrD88J4SLZNLt/9JZejKirgsKoavlSwHy57q3IgUhwDItpU10k5fcn EEQA== X-Gm-Message-State: AOAM532awPBAjZZJ+Qw6eLRAd1bdczCmySPbPI5NdlPdAEsjZNSY5NC9 k2wyM3d/teFGIBIQkKDjdeI= X-Google-Smtp-Source: ABdhPJwA8WcuNRh9h6zTX9Z9hP9sts6fgUyg5NjHaYhqTs5I7Pkg+of30UMxjvnIdGQzWVOLo5TxfQ== X-Received: by 2002:a62:ea04:0:b0:44c:7370:e6d8 with SMTP id t4-20020a62ea04000000b0044c7370e6d8mr9989325pfh.18.1634278547733; Thu, 14 Oct 2021 23:15:47 -0700 (PDT) Received: from bj03382pcu.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id e24sm4045245pfn.8.2021.10.14.23.15.44 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Oct 2021 23:15:47 -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: [PATCH] mm: skip current when memcg reclaim Date: Fri, 15 Oct 2021 14:15:29 +0800 Message-Id: <1634278529-16983-1-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 Sibling thread of the same process could refault the reclaimed pages in the same time, which would be typical in None global reclaim and introduce thrashing. --- mm/vmscan.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index 5199b96..ebbdc37 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2841,6 +2841,11 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc) sc->memcg_low_skipped = 1; continue; } + /* + * Don't bother current when its memcg is below low + */ + if (get_mem_cgroup_from_mm(current->mm) == memcg) + continue; memcg_memory_event(memcg, MEMCG_LOW); } -- 1.9.1