Re: Huge console switching lags

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 2 Oct 2001 19:24:07 +0100 (BST)


> And what's the brilliant reason for this? And don't give any BS about it
> taking too long inside an interrupt context -- we're switching consoles not
> start netscrape.

A console switch has to wait until queued I/O to that console is complete,
which in turn could take a measurable amount of time - so it has to block.
Also a console switch on a frame buffer with no hardware banking can take
a lot of time.

Alan
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