Messages in this thread | | | Date | Wed, 11 Jul 2001 06:43:55 +1200 | From | Chris Wedgwood <> |
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On Tue, Jul 10, 2001 at 02:28:54PM -0400, Brian Gerst wrote:
Jesse Pollard wrote:
> If the entire page table were given to a user, then a full cache > flush would have to be done on every context switch and system > call. That would be very slow, but would allow a full 4G address > for the user.
A full cache flush would be needed at every entry into the kernel, including hardware interrupts. Very poor for performance.
Why would a cache flush be necessary at all? I assume ia32 caches where physically not virtually mapped?
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