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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D454C433EF for ; Tue, 29 Mar 2022 19:13:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id ED1428D0003; Tue, 29 Mar 2022 15:13:31 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E81AA8D0001; Tue, 29 Mar 2022 15:13:31 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D49358D0003; Tue, 29 Mar 2022 15:13:31 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.26]) by kanga.kvack.org (Postfix) with ESMTP id C1DFF8D0001 for ; Tue, 29 Mar 2022 15:13:31 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id A02C861673 for ; Tue, 29 Mar 2022 19:13:31 +0000 (UTC) X-FDA: 79298372622.08.E371E71 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by imf11.hostedemail.com (Postfix) with ESMTP id E3E8B40005 for ; Tue, 29 Mar 2022 19:13:30 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 8631A21A2B; Tue, 29 Mar 2022 19:13:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1648581209; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Zzux7evVbtH+m7VA+DSlcqgknENtBIaS5EV1mQ6pGsA=; b=uQFfaFfHCFQbQq37zmyxuyq31d0Ap5jMuUdXvezuuG9OE/Zyhxrzb6XJQIbQin9a/bABys TXfwrvWNtB47YzOJWjEVccoIvq19a4EmQlwln5TRGBIJlBh61eFERcGZyX36qXclNmeKa3 cDI0Mp6fg/PucyIh5fXcc5tyVx9BKA8= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1648581209; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Zzux7evVbtH+m7VA+DSlcqgknENtBIaS5EV1mQ6pGsA=; b=rUivqUqMHgCFVcFiGO8lOlw4ogru8KE7msvD3CVxl1qQ5+6B29DwCaWhA7n16Hyu7AmFdJ 2MHlhHiJKWyaAjBg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id D17FF13A7E; Tue, 29 Mar 2022 19:13:28 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id NOfnL1haQ2LHVAAAMHmgww (envelope-from ); Tue, 29 Mar 2022 19:13:28 +0000 Date: Tue, 29 Mar 2022 21:13:27 +0200 From: Oscar Salvador To: Rik van Riel Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel-team@fb.com, Miaohe Lin , Naoya Horiguchi , Mel Gorman , Johannes Weiner , Andrew Morton , stable@vger.kernel.org Subject: Re: [PATCH] mm,hwpoison: unmap poisoned page before invalidation Message-ID: References: <20220325161428.5068d97e@imladris.surriel.com> <47936edb3b0f9c9f04f0d0d2e7f38383a22b6a3d.camel@surriel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47936edb3b0f9c9f04f0d0d2e7f38383a22b6a3d.camel@surriel.com> X-Stat-Signature: 3znhasjnpfy5ph1wmk8h1wdaqwfq78mf X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: E3E8B40005 Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=uQFfaFfH; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=rUivqUqM; dmarc=pass (policy=none) header.from=suse.de; spf=pass (imf11.hostedemail.com: domain of osalvador@suse.de designates 195.135.220.28 as permitted sender) smtp.mailfrom=osalvador@suse.de X-Rspam-User: X-HE-Tag: 1648581210-658351 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Mar 29, 2022 at 11:49:53AM -0400, Rik van Riel wrote: > It results in us returning to userspace as if the page > fault had been handled, resulting in a second fault on > the same address. > > However, now the page is no longer in the page cache, > and we can read it in from disk, to a page that is not > hardware poisoned, and we can then use that second page > without issues. Ok, I see, thanks a lot for the explanation Rik. -- Oscar Salvador SUSE Labs