|Subject:||Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console|
|Date:||Wed, 25 Nov 2009 10:03:01 +0100|
|User-agent:||Mozilla-Thunderbird 184.108.40.206 (X11/20090706)|
Anthony Liguori wrote:
On x86 the kernel uses bios output for early prints. We don't have bios and do therefore need to bring up a console device as early as possible so that we can see kernel panics during I/O subsystem detection/startup. All s390 console devices do support this function (3215/3270 and ASCII console), and it is used only up to the point when the kernel has its console subsystem ready to run.What is this used for?
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