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 08:51:19 +0530 [thread overview]
Message-ID: <4E8A7BAF.9020908@in.ibm.com> (raw)
In-Reply-To: <CAEsOVNefdrEgkSG9gO13kQW2akjYWX=Q6xEEkwxQ4Vv5ndfGKw@mail.gmail.com>
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.
Thanks
Suzuki
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next prev parent reply other threads:[~2011-10-04 3:22 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 [this message]
2011-10-04 3:26 ` Suzuki Poulose
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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