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SubjectRe: Light-weight dynamically extended stacks
On Mon, Dec 19, 2005 at 06:27:59PM -0600, Matt Mackall wrote:
>...
> So why am I raising this idea now at all? Because I think Neil's patch
> is too clever and too specific to block layer stacking and I'd rather
> have a more general solution. Block is by no means the only part of
> the system that allows nesting and pathological combinations surely
> still exist. And will be introduced in the future.
>
> Also note that my approach might make it reasonable to use one-page
> stacks everywhere, not just on x86.
>...

I'm really looking forward to seeing your patch.

It will e.g. be interesting to measure whether there'll be any
performance impact.

And since after this patch driver authors might become more sloppy with
stack usage since there's no longer a hard limit, it will be especially
interesting to see how you'll implement ensuring that there are no
additional stack usages > 1 kB between two invocations of you check
function, because otherwise your patch won't work reliable.
cu
Adrian

--

"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed

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