[PATCH] arm64: support more than one crash kernel regions

Chen Zhou chenzhou10 at huawei.com
Sun Jun 2 18:39:10 PDT 2019


Hi Simon,

On 2019/5/31 17:28, Simon Horman wrote:
> On Wed, Apr 03, 2019 at 10:55:04AM +0800, Chen Zhou wrote:
>> When crashkernel is reserved above 4G in memory, kernel should
>> reserve some amount of low memory for swiotlb and some DMA buffers.
>> So there may be two crash kernel regions, one is below 4G, the other
>> is above 4G.
>>
>> Currently, there is only one crash kernel region on arm64, and pass
>> "linux,usable-memory-range = <BASE SIZE>" property to crash dump
>> kernel. Now, we pass
>> "linux,usable-memory-range = <BASE1 SIZE1 BASE2 SIZE2>" to crash
>> dump kernel to support two crash kernel regions and load crash
>> kernel high.
>>
>> Signed-off-by: Chen Zhou <chenzhou10 at huawei.com>
> 
> Sorry for letting this slip through the cracks.
> Please let me know if this is still relevant.
> 

This is still relevant and the kernel patches are still under discussion.

Thanks,
Chen Zhou




More information about the kexec mailing list