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SubjectRe: Huge console switching lags
Ricky Beam wrote:
>
> On Tue, 2 Oct 2001, Andrew Morton wrote:
> >In 2.4.10, the console switching code moved from interrupt context
> >into process context. So if your system is taking a long time to
> >schedule processes (in this case, keventd) then yes, console
> >switching will take a long time.
>
> 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.
>

It takes too long in interrupt context :) Tens of milliseconds
or more. More importantly, it sorts the locking out - you can't
acquire a semaphore in interrupt context.
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