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Subjectshared memory

I have a buffer of reserved physical memory which is mmapped into a
user process' address space. I would like to share this buffer
between multiple processes (specifically with the X server via an
XShmImage). Is there any mechanism in the kernel which could deal
with this -- for example a way of specifying an address to something
like shmget. If not, how would I go about patching my kernel to allow
this? -- is it likely to be straightforward?

Cheers, Ian
Ian Reid _--_|\
Dept of Engineering Science / \
Oxford University, OX1 3PJ \_.--._/
(01865) 273168 v

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