Re: I/O permissions for V86 tasks (Enhanced V86 Mode)?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 21 Jul 1998 13:48:32 +0100 (BST)

> Well I understand about 50% of what you just said. I can see how it
> could be moved to the end of the task structure to make things easier
> for re-sizing, but I don't undertand the 8K hack you mention. Will
> this affect our patch that allocates a full 8Kb I/O bitmap?

2.1.10x keeps a pool of 8K blocks handy for task forks - thats because
it may be unable to get two adjacent pages of memory at any given instant -
same problem you can trip with 2.0 NFS and a very high load.

Allocating an even bigger group of pages is even more likely to fail on
a small machine.

Alan

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