Re: About 4k kernel stack size....

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Wed, 21 Dec 2005, Nikita Danilov wrote:

> linux-os (Dick Johnson) writes:
> >
> > On Tue, 20 Dec 2005, Nikita Danilov wrote:
> >
> > > linux-os \(Dick Johnson\) writes:
> > > >
> > >
> > > [...]
> > >
> > > > See, isn't rule-making fun? This whole 4k stack-
> > > > thing is really dumb. Other operating systems
> > > > use paged virtual memory for stacks, except
> > > > for the interrupt stack. If Linux used paged
> > > > virtual memory for stacks,
> > >
> > > ... then spin-locks couldn't be held across function calls.
> > >
> >
> > Sure they can! In ix86 machines the local 'cli' within the
>
> Sure they cannot: one cannot schedule with spin-lock held, and major
> page fault will block for IO.
>
> [...]
>

Read the text you deleted and you will learn how.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.13.4 on an i686 machine (5589.55 BogoMips).
Warning : 98.36% of all statistics are fiction.
.

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