From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from e28smtp02.in.ibm.com ([122.248.162.2]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TQrYG-0006jl-74 for kexec@lists.infradead.org; Wed, 24 Oct 2012 03:22:41 +0000 Received: from /spool/local by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 24 Oct 2012 08:52:29 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q9O3MPhD27656312 for ; Wed, 24 Oct 2012 08:52:25 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q9O3MP7d029471 for ; Wed, 24 Oct 2012 14:22:25 +1100 Message-ID: <50875E18.8010808@linux.vnet.ibm.com> Date: Wed, 24 Oct 2012 08:48:48 +0530 From: Mahesh Jagannath Salgaonkar MIME-Version: 1.0 Subject: Re: [PATCH 0/2] kexec: Limit the crash memory ranges according to first kernel's memory limit. References: <20120829082201.19391.15191.stgit@mars.in.ibm.com> In-Reply-To: <20120829082201.19391.15191.stgit@mars.in.ibm.com> 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: Simon Horman , Kexec-ml Cc: Benjamin Herrenschmidt , Suzuki Poulose On 08/29/2012 01:54 PM, Mahesh J Salgaonkar wrote: > So far powerpc kernel never exported memory limit information which is > reflected by mem= kernel cmdline option. Hence, kexec-tools always use > to build ELF header for entire system RAM generating a dump bigger than > the actual memory used by the first kernel. > > The proposed upstream kernel patch at > https://lists.ozlabs.org/pipermail/linuxppc-dev/2012-August/100500.html > now exports memory limit information through /proc/device-tree file. > The above patch is still in discussion. The above mentioned kernel patches are now upstream. Below are commit ids: 4bc77a5e - powerpc: Export memory limit via device tree a84fcd468 - powerpc: Change memory_limit from phys_addr_t to unsigned long long > > This patch series now reads the memory limit information from > device-tree file if present and limits the crash memory ranges accordingly. > > Tested these patches on ppc32(ppc440) and ppc64 with a kernel patch by Suzuki. > > Signed-off-by: Mahesh Salgaonkar > Tested-by: Suzuki K. Poulose > > --- > > Mahesh Salgaonkar (2): > kexec: Respect memory limit while building crash memory ranges on ppc32. > kexec: Respect memory limit while building crash memory ranges on ppc64 > > > kexec/arch/ppc/crashdump-powerpc.c | 14 ++++++++--- > kexec/arch/ppc/crashdump-powerpc.h | 1 + > kexec/arch/ppc/kexec-ppc.c | 48 ++++++++++++++++++++++++++++++++++++ > kexec/arch/ppc64/crashdump-ppc64.c | 11 ++++++++ > kexec/arch/ppc64/crashdump-ppc64.h | 1 + > kexec/arch/ppc64/kexec-ppc64.c | 28 +++++++++++++++++++++ > 6 files changed, 99 insertions(+), 4 deletions(-) > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec