trying to use Atomic Lock Memory

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1 total messages Started by Ron Minnich Fri, 26 Feb 1988 03:23

#640

Author: Ron Minnich
Date: Fri, 26 Feb 1988 03:23

15 lines
1008 bytes

I am trying to use Atomic Lock Memory. I know there are other 
mechanisms but i have a reason. I open /dev/alm/alm01 with no
errors, and i do a:
mmap(0x200000, pagesize, PROT_RDWR, MAP_SHARED, almfiledescriptor,0)
and get no error from mmap. BUT, when i try to access 0x200000
from my code i almost always get a segmentation. The problem is weird,
as pdbx will let me single step through the code, but not run through
it; and in some m_forked code, whether i get a segmentation depends
on how many processes are running! Can anyone send me a program
which uses the alm and works. Ones that do m_forks are especially 
useful.
Thanks
ron
-- 
ron (rminnich@udel.edu)

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