Hi Joel, On Wed, Oct 08, 2014 at 04:54:31PM +0200, Christoffer Dall wrote: > On Wed, Oct 08, 2014 at 09:14:09AM -0500, Joel Schopp wrote: > > > > >> Traced it back to the introduction of NO_HZ. Going from > > >> CONFIG_HZ_PERIODIC to CONFIG_NO_HZ_IDLE or CONFIG_NO_HZ_FULL is enough > > >> to do it. > > > Is this specific to running in a VM or do those options break your host > > > system as well? > > Just the guest. The same kernel boots on the host. > > > That's concerning.... We could be losing interrupts for some reason. > I tried to reproduce this and I really cannot reproduce it. I talked to Don Dutile from Red Hat yesterday, and he said he had seen the same behavior when configuring the NO_HZ incorrectly, something about the clocksources getting confused and the system times out before loading the libararies, producing the behavior you're seeing. Are you setting these options with menuconfig or manually in the .config file? It owuld be interesting if you could do a blank defconfig and enable the NO_HZ options through a menuconfig and see if you can reproduce that way? Thanks, -Christoffer _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
