PV guest domU. PV host dom0. On Aug 4, 2015 7:14 PM, "David Vrabel" <david.vra...@citrix.com> wrote:
> 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 >
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