[PATCH 0/2] kexec: Limit the crash memory ranges according to first kernel's memory limit.
Mahesh Jagannath Salgaonkar
mahesh at linux.vnet.ibm.com
Thu Nov 29 22:08:17 EST 2012
On 10/24/2012 08:48 AM, Mahesh Jagannath Salgaonkar wrote:
> 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
>> 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
Did you get chance to review these patchset? The kernel patches are
already in upstream.
>> 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 <mahesh at linux.vnet.ibm.com>
>> Tested-by: Suzuki K. Poulose <suzuki at in.ibm.com>
>> 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(-)
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