Received: by 2002:a25:d7c1:0:0:0:0:0 with SMTP id o184csp5454075ybg; Tue, 22 Oct 2019 03:34:31 -0700 (PDT) X-Google-Smtp-Source: APXvYqwl1qzFhgGudBGwyRHOmAbtD9Vz848nXwqtWD6M9tFfiwLJJEwrF+rhTXRCJAjcy2J5/CUb X-Received: by 2002:a17:906:e290:: with SMTP id gg16mr7494156ejb.280.1571740471662; Tue, 22 Oct 2019 03:34:31 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1571740471; cv=none; d=google.com; s=arc-20160816; b=h4Rqs2JeyYY53aEEROR4Nva11guZCJe/wCCrUetEkiaJbGmmEzrEuLHS0boKbNqBbk WlxeMlHyVhyRjJk6lWP1pJ/gDwWAqt2iNztarDJJIasuSOkjcPEsI6cOjGlLvtrc8e6P UO1BVyOipsdEmlCjRij6+JE9EiBH47M3cxeWkI46wYv05kEniIQXq9Ssd4J9EyppDlge dE3csusElzLZzYveVuur7thyhtDlR0l0gaJnttQYJ5hVSne19p4iONX5lyrupbRONMn8 a4vpj52zeiy4CzphYUn2NRMz2OP7MkWoZT7TZ8iuh2GuO1yTsIWvs1cG2NvW9qPCSX4C OAEg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=m7C162uItMq/9O4H3GgZlsJAG8zAqugMlhlRqQCyX4s=; b=F0nnvvz7BVW+OY7Eke3vLAhYUlsI5POdk6JSuyXlzDFiVBIz2inzzukCADBK94bCNH ra92f29o5otsbb6qQFU7kiWu5XSVEzaBFDd3XJ0rZULQA62JFGnaAdxFmFGyIviJcNjO WV7VtwVMugGVj9lGUsZjGzBd7zLH4ftTdEV+1/SXkpMRiGn52RJzLL6GDlqfW6hrY5nO lVdvB7Cgskiqz8Hu0tXDlsKLx0BrRn5ByoMTKiGBY9Ul/dhOdZzd0kmZDkWAOsO3Gv4s h5zAfQwfppfXPl+m+ELZ4/T8gHET4ChdtFikJq1yD9SqiAVsn8vaXysNf+ivd3OKNhhK gqnQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z6si12067314edm.316.2019.10.22.03.34.07; Tue, 22 Oct 2019 03:34:31 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731864AbfJVKda (ORCPT + 99 others); Tue, 22 Oct 2019 06:33:30 -0400 Received: from mx2.suse.de ([195.135.220.15]:36092 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730197AbfJVKda (ORCPT ); Tue, 22 Oct 2019 06:33:30 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 76520B34A; Tue, 22 Oct 2019 10:33:28 +0000 (UTC) Date: Tue, 22 Oct 2019 12:33:25 +0200 From: Oscar Salvador To: Michal Hocko Cc: n-horiguchi@ah.jp.nec.com, mike.kravetz@oracle.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v2 10/16] mm,hwpoison: Rework soft offline for free pages Message-ID: <20191022103319.GA21736@linux> References: <20191017142123.24245-11-osalvador@suse.de> <20191018120615.GM5017@dhcp22.suse.cz> <20191021125842.GA11330@linux> <20191021154158.GV9379@dhcp22.suse.cz> <20191022074615.GA19060@linux> <20191022082611.GD9379@dhcp22.suse.cz> <20191022083505.GA19708@linux> <20191022092256.GH9379@dhcp22.suse.cz> <20191022095852.GB20429@linux> <20191022102457.GJ9379@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191022102457.GJ9379@dhcp22.suse.cz> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 22, 2019 at 12:24:57PM +0200, Michal Hocko wrote: > Yes, that makes a perfect sense. What I am saying that the migration > (aka trying to recover) is the main and only difference. The soft > offline should poison page tables when not able to migrate as well > IIUC. Yeah, I see your point. I do not really why soft-offline strived so much to left the page untouched unless it was able to content the problem. Note that if we start now to poison pages even if we could not content them (in soft-offline mode), that is a big and visible user change. Not saying it is wrong, but something to consider. Anyway, I would like to put that aside as a follow-up rework after this one, as this one already changes quite some things. -- Oscar Salvador SUSE L3