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spf=tempfail smtp.mailfrom=redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-290-dRK2e63NM6KHF8QHtkWc4A-1; Mon, 23 Aug 2021 09:22:00 -0400 X-MC-Unique: dRK2e63NM6KHF8QHtkWc4A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E2D7D801A92; Mon, 23 Aug 2021 13:21:55 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7A6A510013C1; Mon, 23 Aug 2021 13:21:54 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id C9B7C181A0F2; Mon, 23 Aug 2021 13:21:51 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 17NDLkVr007139 for ; Mon, 23 Aug 2021 09:21:46 -0400 Received: by smtp.corp.redhat.com (Postfix) id 938A01008B77; Mon, 23 Aug 2021 13:21:46 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8DF311134CD7 for ; Mon, 23 Aug 2021 13:21:41 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0F0988556F2 for ; Mon, 23 Aug 2021 13:21:41 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-584-l5a_t4d_NMufhJb929CzFA-1; Mon, 23 Aug 2021 09:21:36 -0400 X-MC-Unique: l5a_t4d_NMufhJb929CzFA-1 Received: by verein.lst.de (Postfix, from userid 2407) id 46C7967357; Mon, 23 Aug 2021 15:21:32 +0200 (CEST) Date: Mon, 23 Aug 2021 15:21:32 +0200 From: "hch@lst.de" To: Dan Williams Message-ID: <20210823132132.GA17677@lst.de> References: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com> <20210730100158.3117319-2-ruansy.fnst@fujitsu.com> <1d286104-28f4-d442-efed-4344eb8fa5a1@oracle.com> <78c22960-3f6d-8e5d-890a-72915236bedc@oracle.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: Jane Chu , "nvdimm@lists.linux.dev" , "snitzer@redhat.com" , "djwong@kernel.org" , "david@fromorbit.com" , "linux-kernel@vger.kernel.org" , "ruansy.fnst@fujitsu.com" , "linux-xfs@vger.kernel.org" , "linux-mm@kvack.org" , "dm-devel@redhat.com" , "linux-fsdevel@vger.kernel.org" , "hch@lst.de" , "agk@redhat.com" Subject: Re: [dm-devel] [PATCH RESEND v6 1/9] pagemap: Introduce ->memory_failure() X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Wed, Aug 18, 2021 at 10:10:51AM -0700, Dan Williams wrote: > > Sounds like a nice solution. I think I can add an is_notify_supported() interface in dax_holder_ops and check it when register dax_holder. > > Shouldn't the fs avoid registering a memory failure handler if it is > not prepared to take over? For example, shouldn't this case behave > identically to ext4 that will not even register a callback? Yes. -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel