[Xen-devel] serial8250: too much work for irq4

[Markus Armbruster <armbru@xxxxxxxxxx>]

I've seen $subject on RHEL-5 hvm guests in a RHEL-5 host with vpcus=2
when I hammer the serial console, e.g. with "od -a /boot/vmlinuz".  I
wonder whether the problem exists in xen-unstable as well.

Wild guess: Unlike a real UART, the virtual UART empties as quickly as
the kernel can stuff in bytes.  So, while the kernel has bytes to stuff,
it doesn't get around to doing much else.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel