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Re: I/O permission bitmap patch for oskit-mach
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From: |
Thomas Bushnell, BSG |
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Subject: |
Re: I/O permission bitmap patch for oskit-mach |
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Date: |
28 Feb 2002 16:30:12 -0800 |
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User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.1 |
Marcus Brinkmann <marcus@gnu.org> writes:
> Design flaw: Changes don't propagate immediately to other threads in
> the same task running on another processor. This applies to enable as
> well as disable operations! Espen Skoglund pointed out that we only
> need to propagate disable operations, enable operations could be picked
> up in the fault handler (for extra performance).
Why is this so? Why not just suspend the threads around the operation
and then resume them (forcing them to reload processor state)?