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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT autolearn=ham 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 3ABEDC072B5 for ; Fri, 24 May 2019 11:43:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1752E2168B for ; Fri, 24 May 2019 11:43:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391255AbfEXLnP (ORCPT ); Fri, 24 May 2019 07:43:15 -0400 Received: from mail-wm1-f52.google.com ([209.85.128.52]:35719 "EHLO mail-wm1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390920AbfEXLnO (ORCPT ); Fri, 24 May 2019 07:43:14 -0400 Received: by mail-wm1-f52.google.com with SMTP id w9so2777254wmi.0 for ; Fri, 24 May 2019 04:43:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=aQ5Notts0BAv9aikRNQKLy1psUiEzig1oST72IhaGow=; b=SNSGOPprwVKCrwRJJSj2pDWUOnlUGflmmHVZOsX99cADIvadSjy7kDVt9teLeWbpkV 7/56/m4EH4BUg+mUqlrMz9wRyaUX1s/KeGxDXwV8eVzPGfDG21DpX9ObvGRJVZDVkdje pJAObpl8PnTrXaBQ36ucFgEYw0Rn0a+uFmd+qL/LcTchka7rLnlNN2Cxq9lqVQE+deoj pi0kXW7oinJWwaewJrh0NZe/qslcyHs6FscLelhIZI1tyfSrVNMPKoj/7eQ5ykB6znS7 LOHWg0D9Xp39ULkGCw6O+FwZIuF4ubDVtHvruypeqt4P3oMWlNaZwV0NDlkAoGOSIRrj hn3A== X-Gm-Message-State: APjAAAXoLtfLt2sIEFEby76FJ/huDBEBxxekD0EpyhHkYDhZDUglQkJg QL14lo+0orEzsOqoVUy981P7QmzT/r4= X-Google-Smtp-Source: APXvYqyM7KgS6R5ZRv/7BgvhV2xOQx8JJLv0FBpz1HKYks8F4VO4kLpVKwOXUcKrjx5ZlTesSmCa+w== X-Received: by 2002:a7b:c444:: with SMTP id l4mr16519573wmi.15.1558698192747; Fri, 24 May 2019 04:43:12 -0700 (PDT) Received: from localhost (nat-pool-brq-t.redhat.com. [213.175.37.10]) by smtp.gmail.com with ESMTPSA id a128sm2210109wmc.13.2019.05.24.04.43.11 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 24 May 2019 04:43:11 -0700 (PDT) Date: Fri, 24 May 2019 13:43:10 +0200 From: Oleksandr Natalenko To: Justin Piszcz Cc: "Kirill A. Shutemov" , LKML Subject: Re: 5.1 kernel: khugepaged stuck at 100% Message-ID: <20190524114310.6h3tlslncepa6323@butterfly.localdomain> References: <002901d5064d$42355ea0$c6a01be0$@lucidpixels.com> <20190509111343.rvmy5noqlf4os3zk@box> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 16, 2019 at 10:27:50AM -0400, Justin Piszcz wrote: > On Thu, May 16, 2019 at 10:17 AM Justin Piszcz wrote: > > > > On Thu, May 16, 2019 at 10:14 AM Justin Piszcz wrote: > > > > > > On Tue, May 14, 2019 at 9:16 AM Kirill A. Shutemov wrote: > > > > > > > Could you check what khugepaged doing? > > > > > > > > cat /proc/$(pidof khugepaged)/stack > > > > > > It is doing it again, 10:12am - 2019-05-16 > > > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > > 77 root 39 19 0 0 0 R 100.0 0.0 92:06.94 khugepaged > > > > > > Kernel: 5.1.2 > > > > > > $ sudo cat /proc/$(pidof khugepaged)/stack > > > [<0>] 0xffffffffffffffff > > > > > As a workaround/in the meantime--I will add the following to lilo/grub: > transparent_hugepage=never > > Justin Cc'ing myself since i observe such a behaviour sometimes right after KVM VM is launched. No luck with reproducing it on demand so far, though. -- Best regards, Oleksandr Natalenko (post-factum) Senior Software Maintenance Engineer