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[Xen-devel] serial8250: too much work for irq4
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] serial8250: too much work for irq4 |
| From: | Markus Armbruster <armbru@xxxxxxxxxx> |
| Date: | Tue, 17 Feb 2009 14:35:15 +0100 |
| Delivery-date: | Tue, 17 Feb 2009 05:35:40 -0800 |
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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 |
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