Re: kvm-36 losing (tap-based) network connectivitymid-session

[Charles Duffy <cduffy-0XdUWXLQalXR7s880joybQ@public.gmane.org>]

Dor Laor wrote:
> Can you try it without rtc (either use -no-rtc, I'm not sure we have
> this flag or just rm /dev/rtc before you run the vm).

Tried it (and -tdf) without effect.

> What's your host HZ configuration?

CONFIG_HZ=250

> If the above doesn't work, can you repeat the test with -no-kvm?

-no-kvm segfaults immediately on startup.

===
Starting program: /usr/bin/kvm -no-kvm -kernel 
kernel-x86_64-2.6.20-gentoo-r8 -hda grubdisk.img
[Thread debugging using libthread_db enabled]
[New Thread 47987424286272 (LWP 13655)]
Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal
error, but for better emulation accuracy either use a 2.6 host Linux 
kernel or
type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47987424286272 (LWP 13655)]
0x0000000000000000 in ?? ()
(gdb) bt

#0  0x0000000000000000 in ?? ()
#1  0x0000000000481e8b in cpu_x86_exec (env1=<value optimized out>) at 
/usr/src/debug/app-emulation/kvm-36/kvm-36/qemu/cpu-exec.c:750
#2  0x0000000000409a6d in main_loop () at 
/usr/src/debug/app-emulation/kvm-36/kvm-36/qemu/vl.c:6311
#3  0x000000000040de7a in main (argc=0, argv=0x7fffba1c59c8) at 
/usr/src/debug/app-emulation/kvm-36/kvm-36/qemu/vl.c:7774
#4  0x00002ba4f12ea5e6 in __libc_start_main () from /usr/local/lib/libc.so.6
#5  0x0000000000405689 in _start ()
===

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