Hi John,

On Wed, May 20, 2020 at 1:53 AM John Donnelly
[off-list ref] wrote:

quoted

On May 19, 2020, at 5:21 AM, Arnd Bergmann [off-list ref] wrote:

On Thu, Mar 26, 2020 at 4:10 AM Chen Zhou [off-list ref] wrote:

quoted

Hi all,

Friendly ping...

I was asked about this patch series, and see that you last posted it in
December. I think you should rebase it to linux-5.7-rc6 and post the
entire series again to make progress, as it's unlikely that any maintainer
would pick up the patches from last year.

For the contents, everything seems reasonable to me, but I noticed that
you are adding a property to the /chosen node without adding the
corresponding documentation to
Documentation/devicetree/bindings/chosen.txt

Please add that, and Cc the devicetree maintainers on the updated
patch.

        Arnd

quoted

On 2019/12/23 23:23, Chen Zhou wrote:

quoted

This patch series enable reserving crashkernel above 4G in arm64.

There are following issues in arm64 kdump:
1. We use crashkernel=X to reserve crashkernel below 4G, which will fail
when there is no enough low memory.
2. Currently, crashkernel=Y@X can be used to reserve crashkernel above 4G,
in this case, if swiotlb or DMA buffers are required, crash dump kernel
will boot failure because there is no low memory available for allocation.

The previous changes and discussions can be retrieved from:

Changes since [v6]
- Fix build errors reported by kbuild test robot.

...

 Hi

We found

https://lkml.org/lkml/2020/4/30/1583

Has cured our Out-Of-Memory kdump failures.

From    Henry Willard
Subject [PATCH] mm: Limit boost_watermark on small zones.

I am currently not on linux-kernel@vger.kernel.org. dlist for all to see  this message so you may want to rebase and see if this cures your OoM issue and share the results.

This is a very interesting finding. Thanks a lot for sharing the same.
I am working on further avoiding OOM issues with arm64 kdump kernels.
I will experiment more with this patch and get back with more details.

Regards,
Bhupesh


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel