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 X-Spam-Level: X-Spam-Status: No, score=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36277C433B4 for ; Thu, 15 Apr 2021 16:27:00 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BEAF86115B for ; Thu, 15 Apr 2021 16:26:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BEAF86115B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4ECE26B0036; Thu, 15 Apr 2021 12:26:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4762A6B006C; Thu, 15 Apr 2021 12:26:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2A2776B0070; Thu, 15 Apr 2021 12:26:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0201.hostedemail.com [216.40.44.201]) by kanga.kvack.org (Postfix) with ESMTP id 01E326B0036 for ; Thu, 15 Apr 2021 12:26:58 -0400 (EDT) Received: from smtpin31.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id A4EA55923BF0 for ; Thu, 15 Apr 2021 16:26:58 +0000 (UTC) X-FDA: 78035130516.31.902FFCB Received: from mail-ej1-f48.google.com (mail-ej1-f48.google.com [209.85.218.48]) by imf02.hostedemail.com (Postfix) with ESMTP id 23A1440002DD for ; Thu, 15 Apr 2021 16:26:41 +0000 (UTC) Received: by mail-ej1-f48.google.com with SMTP id x12so17002371ejc.1 for ; Thu, 15 Apr 2021 09:26:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ZYat+glftsfrxtT0jgRb/9J/h68FED7lkd3DD/NQfhY=; b=cC8VQCiAk6OGkZrGbhnddNsPuC1Gy0VvLiyBSi2E77Mkw7COYnlnSy4S5Zhg00zygD MZPDxfTBkzh8d4jVk23pUZhp95RUETEsXhPp9j7oVwy8evc4e+qgeohjJ1CVAc6mPX7w U2qk73BnsdfSixYbUB8q0YuW04jve9L7EtwEpZHb7rqGQuA47fiF/C39lFKGbsxh6ORe i52cBldCIBYltNpxFlVZo7Jyby1EQZGO5KpKj+eLVcdF9zV4Gp6tZ/Nq4kzfwr24CKgH UyGCiqviGZkcK1YPWHeBRhuzBseScE6AyM1J8x7vFi4rUDKPqXinkP91IN4D5+QzFolj 0pqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=ZYat+glftsfrxtT0jgRb/9J/h68FED7lkd3DD/NQfhY=; b=SqwHUwv66lHeqj6JQLfisln5fZKp7XCuQL54KPr6DJNfIvrtXfJeuTFB7v8NEZRFJ9 jq3CttDjx7lB3d82A4biLtw8pOw9lRbHIrHkRTD6j3yH4xJUKLBzNGyjSQaJPkCO0nik k+4hnrvONG6xGn3lP14aDmqB5SlxYL3bH2GuBjCF4sDwzMxBmUYGxuBZjXxKtpAVR3o+ /7iwGF9/+CGXP8GZlektqd0GERo/v4xIC8e2dL1Ydtu5aHjQplazjlKpggoV6lZ3b2Rn FRy/fVHpjttkG814GlORSTbQpqYQZnb55/szITeWBsInk+5/yWhJhHl/W5UkzqIyO4ML zSCA== X-Gm-Message-State: AOAM530RhXeBgScQW8Eoq3uxScdaOBpaddzvwtoH9dHUGCnD67FX/MCf whz9zgCXp2zF2L/rmONrfLUT8PR1mrMmgYVWAQ9MK/UsgIE= X-Google-Smtp-Source: ABdhPJwHzytNVtIiHWK0OiILlV4vDWygg5CILyzrLJNwJ70fwGTs+AyftsjHes1XSuA/upT2XXfGLXD2n/xGkAn66VE= X-Received: by 2002:a17:906:6dd9:: with SMTP id j25mr4198288ejt.507.1618504017012; Thu, 15 Apr 2021 09:26:57 -0700 (PDT) MIME-Version: 1.0 References: <20210413193015.77E7.409509F4@e16-tech.com> <20210415191854.4457.409509F4@e16-tech.com> In-Reply-To: <20210415191854.4457.409509F4@e16-tech.com> From: Yang Shi Date: Thu, 15 Apr 2021 09:26:45 -0700 Message-ID: Subject: Re: kernel BUG at mm/huge_memory.c:2736(linux 5.10.29) To: Wang Yugui Cc: Linux MM Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 23A1440002DD X-Stat-Signature: 9joocxffpjtduq43isoznoudzk9b8w7e Received-SPF: none (gmail.com>: No applicable sender policy available) receiver=imf02; identity=mailfrom; envelope-from=""; helo=mail-ej1-f48.google.com; client-ip=209.85.218.48 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618504001-985886 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000016, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Apr 15, 2021 at 4:19 AM Wang Yugui wrote: > > Hi, > > This problem yet not happen when switched from > CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y > to > CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y > > so it seems a CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS related problem. _MADVISE means THP is not going to be used unless MADV_HUGEPAGE is called for some address areas. _ALWAYS means THP should be used whenever possible. So if your applications don't call madvise(MADV_HUGEPAGE) there should be no THP at all. And you could adjust the setting by manipulating /sys/kernel/mm/transparent_hugepage/enabled rather than reconfigure/rebuild the kernel. > > > $grep HUGE /boot/config-5.10.29-3.el7.x86_64 > > CONFIG_CGROUP_HUGETLB=y > > CONFIG_ARCH_WANT_GENERAL_HUGETLB=y > > CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y > > CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y > > CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y > > CONFIG_HAVE_ARCH_HUGE_VMAP=y > > CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y > > CONFIG_TRANSPARENT_HUGEPAGE=y > > # CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set > > CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y > > CONFIG_HUGETLBFS=y > > CONFIG_HUGETLB_PAGE=y > > Best Regards > Wang Yugui (wangyugui@e16-tech.com) > 2021/04/15 > >