On 2014.01.22 at 11:45 +0100, Peter Zijlstra wrote: > On Tue, Jan 21, 2014 at 05:28:37PM -0500, Sasha Levin wrote: > > On 12/12/2013 09:08 AM, Peter Zijlstra wrote: > > > > This patch seems to be causing an issue with booting a KVM guest. It seems > > that it > > causes the time to go random during early boot process: > > > > [ 0.000000] Initmem setup node 30 [mem 0x12ee000000-0x138dffffff] > > [ 0.000000] NODE_DATA [mem 0xcfa42000-0xcfa72fff] > > [ 0.000000] NODE_DATA(30) on node 1 > > [ 0.000000] Initmem setup node 31 [mem 0x138e000000-0x142fffffff] > > [ 0.000000] NODE_DATA [mem 0xcfa11000-0xcfa41fff] > > [ 0.000000] NODE_DATA(31) on node 1 > > [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 > > [ 0.000000] kvm-clock: cpu 0, msr 0:cf991001, boot clock > > [133538.294040] Zone ranges: > > [133538.294338] DMA [mem 0x00001000-0x00ffffff] > > [133538.294804] DMA32 [mem 0x01000000-0xffffffff] > > [133538.295223] Normal [mem 0x100000000-0x142fffffff] > > [133538.295670] Movable zone start for each node > >
FYI it happens on real hardware on my machine: ... [ 0.000000] Hierarchical RCU implementation. [ 0.000000] NR_IRQS:4352 nr_irqs:712 16 [ 0.000000] spurious 8259A interrupt: IRQ7. [ 0.000000] Console: colour VGA+ 80x25 [ 0.000000] console [tty0] enabled [ 0.000000] hpet clockevent registered [ 0.000000] tsc: Fast TSC calibration using PIT [ 0.003333] tsc: Detected 3210.681 MHz processor [ 60.375238] Calibrating delay loop (skipped), value calculated using timer frequency.. 6423.91 BogoMIPS (lpj=10702270) [ 60.375240] pid_max: default: 32768 minimum: 301 [ 60.375259] Mount-cache hash table entries: 256 [ 60.375373] tseg: 0000000000 [ 60.375377] CPU: Physical Processor ID: 0 [ 60.375377] CPU: Processor Core ID: 0 [ 60.375378] mce: CPU supports 6 MCE banks [ 60.375382] LVT offset 0 assigned for vector 0xf9 [ 60.375384] process: using AMD E400 aware idle routine [ 60.375386] Last level iTLB entries: 4KB 512, 2MB 16, 4MB 8 ... -- Markus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
