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SubjectRe: [RFC] Wine speedup through kernel module
David Howells wrote:

> (2) Some sort of support for (dynamically allocated) system calls implemented
> in modules.

FWIW, this can be done with relatively low overhead by creating a
miscelaneous character device, and just using write() to write in the
arguments. This is a bit worse than passing things through registers,
but doesn't seem all that bad.

Nonetheless, having some entries in the syscall table that are
designated as "dynamically allocatable" would be a nifty trick. If the
kernel managed these, modules coluld safely grab a few at load time, and
then declare which indices to use via a /proc file.

-Rob von Behren
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