Hi Joel,
I was able to boot with 3.17-rc3 kernel (as both host and guest, same
kernel image). Are you using 3.17-rc3.sa2? Could you add "-initrd" to
qemu, pointing to the corresponding initramfs file in /boot directory?
-Wei
On 10/07/2014 03:43 PM, Joel Schopp wrote:
On 10/07/2014 02:17 PM, Joel Schopp wrote:
On 10/07/2014 01:34 PM, Christoffer Dall wrote:
On Tue, Oct 07, 2014 at 01:28:38PM -0500, Joel Schopp wrote:
-drive file=/Image.img,id=fs -device virtio-blk-device,drive=fs
more specifically
./aarch64-softmmu/qemu-system-aarch64 -smp 1 --enable-kvm -nographic
-kernel /Image -drive file=/Image.img,id=fs -device
virtio-blk-device,drive=fs -m 1024 -M virt -cpu host -no-reboot -append
"console=ttyAMA0 console=ttyS0 rootwait root=/dev/vda4 rw"
Can you post your guest kernel config somewhere for me to try and
reproduce?
Thanks for offering to help. Before you spend some time on it let me
debug and see what progress I can make. Since I can reproduce it
reliably now I can narrow things down with git bisect.
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.
Earlier in boot there was a message that might be related:
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
And indeed there is not rtc or rtc0 in /dev in the guest like there is
on the host. I'm guessing this is more missing functionality than it is
a bug.
--- ../goodconfig 2014-10-07 01:05:56.772530930 -0400
+++ ../stilstilbroken 2014-10-07 01:30:39.183447517 -0400
@@ -64,8 +64,9 @@
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
-CONFIG_HZ_PERIODIC=y
-# CONFIG_NO_HZ_IDLE is not set
+CONFIG_NO_HZ_COMMON=y
+# CONFIG_HZ_PERIODIC is not set
+CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
# CONFIG_NO_HZ is not set
CONFIG_HIGH_RES_TIMERS=y
@@ -73,8 +74,9 @@
#
# CPU/Task time and stats accounting
#
-CONFIG_TICK_CPU_ACCOUNTING=y
-# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
+CONFIG_VIRT_CPU_ACCOUNTING=y
+# CONFIG_TICK_CPU_ACCOUNTING is not set
+CONFIG_VIRT_CPU_ACCOUNTING_GEN=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
@@ -84,10 +86,13 @@
CONFIG_TREE_RCU=y
# CONFIG_PREEMPT_RCU is not set
CONFIG_RCU_STALL_COMMON=y
-# CONFIG_RCU_USER_QS is not set
+CONFIG_CONTEXT_TRACKING=y
+CONFIG_RCU_USER_QS=y
+# CONFIG_CONTEXT_TRACKING_FORCE is not set
CONFIG_RCU_FANOUT=64
CONFIG_RCU_FANOUT_LEAF=16
# CONFIG_RCU_FANOUT_EXACT is not set
+# CONFIG_RCU_FAST_NO_HZ is not set
# CONFIG_TREE_RCU_TRACE is not set
CONFIG_RCU_NOCB_CPU=y
# CONFIG_RCU_NOCB_CPU_NONE is not set
_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
