[uml-devel] problems with ifup-a on etch compiled kernels

[Michael Richardson <mcr@sandelman.ca>]

I don't know whether to blame a recent update to debian testing from stable --- likely it would be a glibc issue, but...
I did run into the _syscall0() problem after that, and I found that I could get around it by appropriately #define 
_KERNEL prior to #include <linux/unistd.h>. What I don't get about the remark of Paolo is that _syscall0() is a userland 
thing, not a kernel thing.

I.e. any user program should be able to use _syscall() to get an open coded call to the kernel.

Anyway, my problem: 2.6.15, 2.6.17.13 (both patched as above), and 2.6.19-rc3 all fail during ifup -a:

+ echo -n 'Configuring network interfaces: '
Configuring network interfaces: + ifup -a
BUG: soft lockup detected on CPU#0!
083bf9f0:  [<080632a2>] dump_stack+0x22/0x30
083bfa08:  [<080a25c4>] softlockup_tick+0x84/0xa0
083bfa20:  [<0808ca32>] run_local_timers+0x12/0x20
083bfa28:  [<0808c796>] update_process_times+0x36/0x90
083bfa48:  [<080636fc>] timer_handler+0x3c/0x70
083bfa64:  [<080798f9>] sig_handler_common_skas+0xa9/0x100
083bfa88:  [<08075413>] real_alarm_handler+0x23/0x60
083bfaa0:  [<080754a2>] alarm_handler+0x52/0x70
083bfabc:  [<08077eda>] hard_handler+0x1a/0x20
083bfacc:  [<ffffe420>] _etext+0xf7df5404/0x0
083bfe14:  [<081a3431>] inet_ioctl+0x61/0xa0
083bfe2c:  [<081525a4>] sock_ioctl+0x144/0x2b0
083bfe60:  [<080d022f>] do_ioctl+0x5f/0x70
083bfe80:  [<080d04e2>] vfs_ioctl+0x62/0x2d0
083bfebc:  [<080d0791>] sys_ioctl+0x41/0x70
083bfee4:  [<08065a83>] handle_syscall+0xd3/0xe0
083bff54:  [<0807897a>] handle_trap+0x2a/0x130
083bff7c:  [<08079074>] userspace+0x1c4/0x220
083bffd4:  [<0806569e>] fork_handler+0x9e/0xb0
083bfffc:  [<00000000>] _sinittext+0xf7fb7000/0x20

If I boot with "linux emergency" login to the single user shell and run "ifup -a", everything is fine.

This is on my laptop running 2.6.17.4 as the host kernel, not under XenU as I previously had
been posting about.

(I'm in an airport lounge at Chicago)


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