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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 4FBB9C3B18C for ; Thu, 13 Feb 2020 19:16:16 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2A81B222C2 for ; Thu, 13 Feb 2020 19:16:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="N4Fkoj09" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A81B222C2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id EEAFE10FC33EF; Thu, 13 Feb 2020 11:19:32 -0800 (PST) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=207.211.31.120; helo=us-smtp-1.mimecast.com; envelope-from=jmoyer@redhat.com; receiver= Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 008F910FC3384 for ; Thu, 13 Feb 2020 11:19:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581621373; h=from:from:reply-to:subject:subject: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=3SQ+LK7N11bGZ8q1OPiZl9texnQsy+HSMYBO5njmoYo=; b=N4Fkoj09VKw5WjwIbst8XMsYyw8kQqWy/YbHe0/6sluPgRC/o7PGDSoZP2nWrdq3H8jsaa gKokiLuUoNlHNuDAlmtT3RveT4+PyutmESO/MYVak69+yl/9aMvY9774WsAZs/uEYTdVEI LTr5SBmAiLLkOpc/cjmrtnJ0H1hVfGM= 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-149-XG0hJnjHPBS9gjBI-CDJyA-1; Thu, 13 Feb 2020 14:16:04 -0500 X-MC-Unique: XG0hJnjHPBS9gjBI-CDJyA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2FB91107ACCC; Thu, 13 Feb 2020 19:16:02 +0000 (UTC) Received: from segfault.boston.devel.redhat.com (segfault.boston.devel.redhat.com [10.19.60.26]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5C5D35C100; Thu, 13 Feb 2020 19:16:01 +0000 (UTC) From: Jeff Moyer To: Dan Williams Subject: Re: [PATCH v2 2/4] libnvdimm/namespace: Enforce memremap_compat_align() References: <158155489850.3343782.2687127373754434980.stgit@dwillia2-desk3.amr.corp.intel.com> <158155490897.3343782.14216276134794923581.stgit@dwillia2-desk3.amr.corp.intel.com> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 Date: Thu, 13 Feb 2020 14:16:00 -0500 In-Reply-To: <158155490897.3343782.14216276134794923581.stgit@dwillia2-desk3.amr.corp.intel.com> (Dan Williams's message of "Wed, 12 Feb 2020 16:48:29 -0800") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Message-ID-Hash: HEGIBYGVZZNF4BXP7CBOK46S3FQDGIXG X-Message-ID-Hash: HEGIBYGVZZNF4BXP7CBOK46S3FQDGIXG X-MailFrom: jmoyer@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: linux-nvdimm@lists.01.org, "Aneesh Kumar K.V" , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Dan Williams writes: > The pmem driver on PowerPC crashes with the following signature when > instantiating misaligned namespaces that map their capacity via > memremap_pages(). > > BUG: Unable to handle kernel data access at 0xc001000406000000 > Faulting instruction address: 0xc000000000090790 > NIP [c000000000090790] arch_add_memory+0xc0/0x130 > LR [c000000000090744] arch_add_memory+0x74/0x130 > Call Trace: > arch_add_memory+0x74/0x130 (unreliable) > memremap_pages+0x74c/0xa30 > devm_memremap_pages+0x3c/0xa0 > pmem_attach_disk+0x188/0x770 > nvdimm_bus_probe+0xd8/0x470 > > With the assumption that only memremap_pages() has alignment > constraints, enforce memremap_compat_align() for > pmem_should_map_pages(), nd_pfn, or nd_dax cases. > > Reported-by: Aneesh Kumar K.V > Cc: Jeff Moyer > Reviewed-by: Aneesh Kumar K.V > Link: https://lore.kernel.org/r/158041477336.3889308.4581652885008605170.stgit@dwillia2-desk3.amr.corp.intel.com > Signed-off-by: Dan Williams Reviewed-by: Jeff Moyer _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org