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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 0212EC433E0 for ; Thu, 4 Jun 2020 23:48:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B4A4020885 for ; Thu, 4 Jun 2020 23:48:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="BmmVeiR8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4A4020885 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 571FE28002E; Thu, 4 Jun 2020 19:48:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4F9F8280005; Thu, 4 Jun 2020 19:48:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4110C28002E; Thu, 4 Jun 2020 19:48:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0151.hostedemail.com [216.40.44.151]) by kanga.kvack.org (Postfix) with ESMTP id 2DD23280005 for ; Thu, 4 Jun 2020 19:48:47 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id E68533753 for ; Thu, 4 Jun 2020 23:48:46 +0000 (UTC) X-FDA: 76893171852.24.pain65_42083e326d9b Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin24.hostedemail.com (Postfix) with ESMTP id CEBC21A4A0 for ; Thu, 4 Jun 2020 23:48:46 +0000 (UTC) X-HE-Tag: pain65_42083e326d9b X-Filterd-Recvd-Size: 2950 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Thu, 4 Jun 2020 23:48:46 +0000 (UTC) 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 4C8FF208A9; Thu, 4 Jun 2020 23:48:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591314525; bh=KIt+VT6u440TMqdpovW7laskz9moOsVq5uhMxvAEuPc=; h=Date:From:To:Subject:In-Reply-To:From; b=BmmVeiR8Bas1+XujQH2hULrZVeUcgqBWT+EVdLPzBEjBkT9h8T4Z8MccDhVSsZFdc RVwBN1ItmmNr6VTBphnt5tDiriZ0NU0fk1XuS9OOBvYQtNE4RcIGYT8/1hvXcEfusB uSc5irOi21N9+RKTxq4EH3hNEZu2YAioyRiUNA1A= Date: Thu, 04 Jun 2020 16:48:44 -0700 From: Andrew Morton To: akpm@linux-foundation.org, bhe@redhat.com, dan.j.williams@intel.com, dave.hansen@linux.intel.com, david@redhat.com, ebiederm@xmission.com, linux-mm@kvack.org, mhocko@suse.com, mm-commits@vger.kernel.org, pankaj.gupta.linux@gmail.com, pasha.tatashin@soleen.com, richard.weiyang@gmail.com, torvalds@linux-foundation.org Subject: [patch 048/127] kexec_file: don't place kexec images on IORESOURCE_MEM_DRIVER_MANAGED Message-ID: <20200604234844.W8bo93R35%akpm@linux-foundation.org> In-Reply-To: <20200604164523.e15f3177f4b69dcb4f2534a1@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: CEBC21A4A0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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: From: David Hildenbrand Subject: kexec_file: don't place kexec images on IORESOURCE_MEM_DRIVER_MANAGED Memory flagged with IORESOURCE_MEM_DRIVER_MANAGED is special - it won't be part of the initial memmap of the kexec kernel and not all memory might be accessible. Don't place any kexec images onto it. Link: http://lkml.kernel.org/r/20200508084217.9160-4-david@redhat.com Signed-off-by: David Hildenbrand Cc: Michal Hocko Cc: Pankaj Gupta Cc: Wei Yang Cc: Baoquan He Cc: Dave Hansen Cc: Eric Biederman Cc: Pavel Tatashin Cc: Dan Williams Signed-off-by: Andrew Morton --- kernel/kexec_file.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/kernel/kexec_file.c~kexec_file-dont-place-kexec-images-on-ioresource_mem_driver_managed +++ a/kernel/kexec_file.c @@ -540,6 +540,11 @@ static int locate_mem_hole_callback(stru unsigned long sz = end - start + 1; /* Returning 0 will take to next memory range */ + + /* Don't use memory that will be detected and handled by a driver. */ + if (res->flags & IORESOURCE_MEM_DRIVER_MANAGED) + return 0; + if (sz < kbuf->memsz) return 0; _