From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from qmta12.emeryville.ca.mail.comcast.net ([2001:558:fe2d:44:76:96:27:227]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TPIt7-0005nH-U2 for kexec@lists.infradead.org; Fri, 19 Oct 2012 20:09:46 +0000 Message-ID: <1350677378.30243.19.camel@rhapsody> Subject: Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting From: Khalid Aziz Date: Fri, 19 Oct 2012 14:09:38 -0600 In-Reply-To: <20121019145300.GC27052@redhat.com> References: <20121018031608.GA3925@localhost.localdomain> <878vb332a9.fsf@xmission.com> <20121019145300.GC27052@redhat.com> Mime-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Vivek Goyal Cc: Dave Young , horms@verge.net.au, kexec@lists.infradead.org, "Eric W. Biederman" On Fri, 2012-10-19 at 10:53 -0400, Vivek Goyal wrote: > On Thu, Oct 18, 2012 at 02:20:46PM -0700, Eric W. Biederman wrote: > > > > If we are passing the acpi sections is that not enough for the kernel > > to find the rdsp area? I'm just a bit surprised we need this patch > > is all. > > > > Somehow it seems a bit ugly to pass information that could be conveyed > > in the memory map on the command line. > > I have no idea how UEFI case is working. Dave/Khalid might have more > details on this. On a UEFI machine with CSM, kernel finds RSDP in EBDA. On a UEFI machine with no CSM, kernel fails to find RSDP and here is the message I see: ACPI BIOS Bug: Error: A valid RSDP was not found (20120913/tbxfroot-219) -- Khalid _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec