On 04/08/15 17:41, Jason A. Donenfeld wrote:
> Hi folks,
>
> Paul McKenney and I had an offline discussion about some rcu questions
> that eventually lead into me investigating a strange full lock-up I'm
> experiencing as a consequence of a printk in softirq inside of an
> rcu_read_lock, when using Xen PV. Relevant excerpts of the
^^ PV guest?
> (gdb) target remote localhost:9999
> Remote debugging using localhost:9999
> __xapic_wait_icr_idle () at ./arch/x86/include/asm/ipi.h:56
> 56 while (native_apic_mem_read(APIC_ICR) & APIC_ICR_BUSY)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ => HVM guest
Which is it?
A HVM guest's serial console may be particularly slow (since it's
emulated by qemu). Try using the PV console?
David
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
