>Im a little apprehensive about having 4 processes between a disk read and the
>disk:
>client ==> disk-FS ==> PDRV ==> XPT ==> SIM ==> disk
>[ and back - though this MAY be shorter ]
>aNoting that each one is a context switch even if the data is 'copied'
>using VM mappings, the registers and VM mapping must be saved and flushed etc
Has anyone looked into the Spring fastcall mechanism? I advertized some
publicly available Spring papers on this list a while back. One of them
describes a mechanism for doing extremely fast cross address space calls
which might address Jon's concerns.
--JYL
Received on Thu Sep 16 22:04:16 1993
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