Am 07.04.2015 um 17:29 schrieb Dr. David Alan Gilbert: > * Peter Lieven (p...@kamp.de) wrote: >> Hi David, >> >> Am 07.04.2015 um 10:43 schrieb Dr. David Alan Gilbert: >>>>>> Any particular workload or reproducer? >>>>> Workload is almost zero. I try to figure out if there is a way to trigger >>>>> it. >>>>> >>>>> Maybe playing a role: Machine type is -M pc1.2 and we set -kvmclock as >>>>> CPU flag since kvmclock seemed to be quite buggy in 2.6.16... >>>>> >>>>> Exact cmdline is: >>>>> /usr/bin/qemu-2.2.1 -enable-kvm -M pc-1.2 -nodefaults -netdev >>>>> type=tap,id=guest2,script=no,downscript=no,ifname=tap2 -device >>>>> e1000,netdev=guest2,mac=52:54:00:ff:00:65 -drive >>>>> format=raw,file=iscsi://172.21.200.53/iqn.2001-05.com.equallogic:4-52aed6-88a7e99a4-d9e00040fdc509a3-XXX-hd0/0,if=ide,cache=writeback,aio=native >>>>> -serial null -parallel null -m 1024 -smp >>>>> 2,sockets=1,cores=2,threads=1 -monitor tcp:0:4003,server,nowait -vnc :3 >>>>> -qmp tcp:0:3003,server,nowait -name 'XXX' -boot order=c,once=dc,menu=off >>>>> -drive index=2,media=cdrom,if=ide,cache=unsafe,aio=native,readonly=on -k >>>>> de -incoming tcp:0:5003 -pidfile /var/run/qemu/vm-146.pid -mem-path >>>>> /hugepages -mem-prealloc -rtc base=utc -usb -usbdevice tablet -no-hpet >>>>> -vga cirrus -cpu qemu64,-kvmclock >>>>> >>>>> Exact kernel is: >>>>> 2.6.16.46-0.12-smp (i think this is SLES10 or sth.) >>>>> >>>>> The machine does not hang. It seems just I/O is hanging. So you can type >>>>> at the console or ping the system, but no longer login. >>>>> >>>>> Thank you, >>>>> Peter >>>> Interesting observation: Migrating the vServer again seems to fix to >>>> problem (at least in one case I could test just now). >>>> >>>> 2.6.8-24-smp is also affected. >>> How often does it fail - you say 'sometimes' - is it a 1/10 or a 1/1000 ? >> Its more often than 1/10 I would say. > OK, that's not too bad - it's the 1/1000 that are really nasty to find. > In your setup, how easy would it be for you to try : > with either 2.1 or current head? > with a newer machine-type? > without the cdrom?
Its all possible. I can clone the system and try everything on my test systems. I hope it reproduces there. Has the cdrom the power of taking down the bus? Peter
