On Feb 21, 2014, at 12:27 PM, Dave <dave@xxxxxxxxxxxxxxxx> wrote: > On Fri, Feb 21, 2014 at 12:59 PM, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: >> Five concurrent VMs for one spinning disk. It sounds like it's seeking to death. > > That's my reproducible test, not typical use. > > "Seeking to death" would indicate drive activity. When the problem > occurs, drive activity stops for minutes at a time. > > I suppose I shouldn't have even mentioned VMs because that seems to be > muddying the discussion. The problem persists after all the VMs are > shut down. For instance, right now I'm not running any VMs but I'm > experiencing the problem (though I was performing the above test). I > can observe it by doing a local git clone of the linux kernel: > git clone /usr/src/linux > > If I run this from a fresh boot, it causes the hard drive to chatter > but doesn't cause IO to hang. After running the above 5-VM test for a > day, even after shutting down the VMs, my machine is still in this > state that causes IO to periodically hang. I am not a Btrfs developer, but when the problem isn't already known, usually comes the request to reproduce the problem and issue sysrq+w, and then grab a full dmesg and post that. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
