On 2024/12/12 18:13, David Woodhouse wrote:
On Thu, 2024-12-12 at 11:03 +0800, Ning, Hongyu wrote:
Hi David,
I've hit some kdump/kexec regression issue for guest kernel in KVM/QEMU
based VM and reported in https://bugzilla.kernel.org/show_bug.cgi?id=219592.
based on further git bisect, it seems to be related with this commit,
would you help to take a look?
Thanks for the report; I'll take a look. Please could you share your
kernel .config?
kernel config updated in the bugzilla
https://bugzilla.kernel.org/show_bug.cgi?id=219592
Also, you say that this is in QEMU running on an IA64 host. Is that
true, or did you mean x86_64 host? Are you using OVMF or SeaBIOS as the
QEMU firmware?
You're right, it's x86_64 host, I miss-selected it in bugzilla.
I'm using OVMF as the QEMU firmware.
In the short term, I think that just reverting the 'offending' commit
should be OK. I'd *prefer* not to leave the page RWX for the whole time
period that the image is loaded, but that's how it's been on i386 for
ever anyway.
And your latest patch
https://lore.kernel.org/kexec/9c68688625f409104b16164da30aa6d3eb494e5d.camel@xxxxxxxxxxxxx/
could fix this issue now.
