Re: ia64 port needs help in order to be saved
On 05.08.20 15:30, John Paul Adrian Glaubitz wrote:
On 8/5/20 2:51 PM, John Paul Adrian Glaubitz wrote:
So latest 4.14.x kernels should work w/o the patch on a rx2800 i2 with
Itanium 9300 (Tukwila) series processors - if they are compiled with gcc 10.
I'm currently running a 4.14.192 kernel with the ptrace patch. While it doesn't
crash, I'm seeing a kworker thread with rather high load.
Do you observe that as well?
I have tried 4.19.137 now with the same configuration and Sergey's ptrace patch
and sure enough it crashes when loading the first modules.
I think this is due to:
rx2800-i2 /usr/src/linux-on-ramdisk # git bisect good
543cea9accd9804307541cb93d3ed7ec94b07237 is the first bad commit
Author: Christoph Hellwig <email@example.com>
Date: Sun Dec 24 15:10:07 2017 +0100
ia64: use generic swiotlb_ops
These are identical to the ia64 ops, and would also support CMA
if enabled on ia64.
Signed-off-by: Christoph Hellwig <firstname.lastname@example.org>
Acked-by: Christian König <email@example.com>
:040000 040000 5fe9ea16dd24746410a88e8e57d5722eabf99650
3cdc996c27f5b5f1cb626dcfe246146e09cb804c M arch
The bisecting happened between 4.15.18 () - which still ran on my
rx2800 i2 - and 4.16-rc1 () - which crashes it during OS bootup.
Maybe you try to apply Chrisoph Hellwig's patch from  (whole thread
on )? If it works then, it could to be related.