From: Suzuki Poulose <suzuki@in.ibm.com>
To: McClintock Matthew-B29882 <B29882@freescale.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Simon Horman <horms@verge.net.au>,
Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"M. Mohan Kumar" <mohan@in.ibm.com>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH] kexec: powerpc: crash_dump: No backup region for PPC BookE
Date: Tue, 04 Oct 2011 08:56:49 +0530 [thread overview]
Message-ID: <4E8A7CF9.9020009@in.ibm.com> (raw)
In-Reply-To: <4E8A7BAF.9020908@in.ibm.com>
On 10/04/11 08:51, Suzuki Poulose wrote:
> On 10/03/11 23:53, McClintock Matthew-B29882 wrote:
>> On Mon, Oct 3, 2011 at 5:18 AM, Suzuki K. Poulose<suzuki@in.ibm.com> wrote:
>>> Disable backup regions for BookE in case of a CRASH Dump, as they can
>>> be run from anywhere.
>>>
>>> The patch introduces --with-booke option to support the BookE.
>>>
>>> With the patch, we get :
>>>
>>> ## On a 256M machine:
>>>
>>> # busybox cat /proc/cmdline
>>> init=/bin/init console=ttyS0,16550 crashkernel=128M@100M
>>> # kexec -p root/vmlinux
>>> usable memory rgns size:1 base:6400000 size:8000000
>>> CRASH MEMORY RANGES
>>> 0000000000000000-0000000006400000
>>> 000000000e400000-0000000010000000
>>> Command line after adding elfcorehdr: elfcorehdr=112380K
>>> Command line after adding elfcorehdr: elfcorehdr=112380K savemaxmem=256M
>>
>> So there were two crash regions when we only needed the one specified
>> on the command line?
>>
> Yes, and isn't that is expected ? The first kernel uses the memory region
> (0-100M), (228M,256M). Where the 100-228M is reserved for crash kernel.
The CRASH MEMORY RANGES denotes the memory ranges of the crashed kernel and
usable memory regions denote the memory usable by the second kernel.
Thanks
Suzuki
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next prev parent reply other threads:[~2011-10-04 3:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-03 10:18 [PATCH] kexec: powerpc: crash_dump: No backup region for PPC BookE Suzuki K. Poulose
2011-10-03 18:23 ` McClintock Matthew-B29882
2011-10-04 3:21 ` Suzuki Poulose
2011-10-04 3:26 ` Suzuki Poulose [this message]
2011-10-04 4:30 ` McClintock Matthew-B29882
2011-10-10 9:53 ` Suzuki Poulose
2011-10-21 7:48 ` Simon Horman
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