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September 19th, 2007 03:00

shmget() error - "Invalid argument" when size > 1MB

I am running Red Hat 2.6.18 and have 7GB free memory available.  Kernel parameter shmmax is set to 4GB.  When I use shmget() to create a shared memory segment with size > 1MB, I get the "Invalid argument" error.  1MB or less works fine.  What else could I be missing?
 
 
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