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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 91D93C35250 for ; Mon, 10 Feb 2020 05:45:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 643D920870 for ; Mon, 10 Feb 2020 05:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581313532; bh=a6GtMCJ6LYEgHRTB2twm3iLrqc5jPa8TECt9e1cyYmo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=YRxFs5Xoj2I4fW3cjz1EGi3qwdERqoVXgb4k8/T1+w9v2ejpjScezvMZxk6DOkjxQ if47llC77CNie6BjqMKLpezNyvct3BfVd7Gjx87qRQoLWOV+x/q3zVgECyuN9xwjlM q4oiHT3AdXe/sK7jODHIZHCuk7b8cswv6tHcqxgs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727121AbgBJFpb (ORCPT ); Mon, 10 Feb 2020 00:45:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:57402 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726796AbgBJFpb (ORCPT ); Mon, 10 Feb 2020 00:45:31 -0500 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AAD3720715; Mon, 10 Feb 2020 05:45:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581313530; bh=a6GtMCJ6LYEgHRTB2twm3iLrqc5jPa8TECt9e1cyYmo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=b7/b7G5ZgOyBEAo9Vq/29ja3ynt+kXXDaiBfqcKrJtMwLtsgF+kEzZodYZQwgB5+U Cix0Nfj9oMg3bLpFm+fVwcg3+v9VZsKKt7+QGF2d2QtEz2R8aAA3yo+Oui770qwzwt atl0lve2djKpBApDNLd4yMuWzgktRx+JnKs2YjiE= Date: Sun, 9 Feb 2020 21:45:30 -0800 From: Andrew Morton To: Shile Zhang Cc: Kirill Tkhai , Pavel Tatashin , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RESEND] mm: fix tick_sched timer blocked by pgdat_resize_lock Message-Id: <20200209214530.e17798f182000b7726a621c5@linux-foundation.org> In-Reply-To: <39eb8ac4-bdb2-bdf2-9189-2d088edb43c1@linux.alibaba.com> References: <20200110082510.172517-2-shile.zhang@linux.alibaba.com> <20200110093053.34777-1-shile.zhang@linux.alibaba.com> <1ee6088c-9e72-8824-3a9a-fc099d196faf@virtuozzo.com> <9420eab3-5e5e-150f-53c9-6cd40bacf859@virtuozzo.com> <39eb8ac4-bdb2-bdf2-9189-2d088edb43c1@linux.alibaba.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 4 Feb 2020 15:24:38 +0800 Shile Zhang wrote: > Hi, Andrew, > > Sorry for ping, could you please also help to check this issue? > Any comments from you is welcome! > Kirill's suggestion isn't pretty but it appears that it will work OK - redo deferred_init_memmap() so it releases 1024(?) pages at a time, releasing and retaking pgdat_resize_lock/unlock each time around?