Re: Disk I/O stuck with KVM - no clue how to solve that

2010-11-08 Thread Hermann Himmelbauer
Am Montag 08 November 2010 07:32:39 schrieb Stefan Hajnoczi: If you have the time, you can use perf probes to trace I/O requests in the host kernel. Perhaps completion interrupts are being dropped. You may wish to start by tracing requests issued and completed by the SATA driver.

Re: Disk I/O stuck with KVM - no clue how to solve that

2010-11-07 Thread Hermann Himmelbauer
Am Samstag 06 November 2010 20:58:12 schrieb Stefan Hajnoczi: On Fri, Nov 5, 2010 at 5:16 PM, Hermann Himmelbauer du...@qwer.tk wrote: I experience strange disk I/O stucks on my Linux Host + Guest with KVM, which make the system (especially the guests) almost unusable. These stucks come

Re: Disk I/O stuck with KVM - no clue how to solve that

2010-11-07 Thread Stefan Hajnoczi
On Sun, Nov 7, 2010 at 4:07 PM, Hermann Himmelbauer du...@qwer.tk wrote: Am Samstag 06 November 2010 20:58:12 schrieb Stefan Hajnoczi: On Fri, Nov 5, 2010 at 5:16 PM, Hermann Himmelbauer du...@qwer.tk wrote: I experience strange disk I/O stucks on my Linux Host + Guest with KVM, which make

Re: Disk I/O stuck with KVM - no clue how to solve that

2010-11-06 Thread Stefan Hajnoczi
On Fri, Nov 5, 2010 at 5:16 PM, Hermann Himmelbauer du...@qwer.tk wrote: I experience strange disk I/O stucks on my Linux Host + Guest with KVM, which make the system (especially the guests) almost unusable. These stucks come periodically, e.g. every 2 to 10 seconds and last between 3 and

Disk I/O stuck with KVM - no clue how to solve that

2010-11-05 Thread Hermann Himmelbauer
Hi, I already tried to get some help on the KVM list for my problem but had no success, so the problem could be not KVM related at all, therefore maybe someone here has an idea: I experience strange disk I/O stucks on my Linux Host + Guest with KVM, which make the system (especially the