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Re: ia64 port needs help in order to be saved



Hello Frank!

On 8/4/20 9:04 PM, Frank Scheiner wrote:
> All kernels used Sergei's configuration adapted to enable network boot.
> 
> * 4.14.83 vanilla w/o ptrace patch and compiled with "gcc (Gentoo
> 7.3.0-r3 p1.4) 7.3.0" leads to a reboot after kernel and initramfs are
> loaded:
> 
> ```
> ELILO v3.16 for EFI/IA-64
> ..
> Uncompressing Linux... done
> Loading file AC10027B.initrd.img...done
> 1,0,0,0 5400006301E10000 0000000000000000 EVN_BOOT_START

I have noticed that such an immediate reboot is also observed with certain
versions of elilo. For example, the elilo version in Wheezy causes an
immediate reboot while the version from Squeeze works.

But we're using GRUB anyway. And since unpatched versions of gcc are
known to produce a buggy kernel, we don't need to test that either.

> * 4.14.83 vanilla w/o ptrace patch and compiled with "gcc (Debian
> 10.2.0-3) 10.2.0" works and boots Debian GNU/Linux Sid successfully to
> the login prompt on my rx2800 i2 and also runs stable enough to
> recompile itself:
> 
> ```
> ELILO v3.16 for EFI/IA-64
> ..
> Uncompressing Linux... done
> Loading file AC10027B.initrd.img...done
> [    0.000000] Linux version 4.14.83vanilla (root@rx2800-i2) (gcc
> version 10.2.0 (Debian 10.2.0-3)) #1 SMP Tue Aug 4 15:56:40 UTC 2020
> [...]
> Debian GNU/Linux bullseye/sid rx2800-i2 ttyS1
> 
> rx2800-i2 login:
> ```
> 
> * The same holds true for 4.14.191 vanilla w/o ptrace patch and compiled
> with the same gcc.
> 
> 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?

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913


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