Re: shm_open return ENOSYS

[Ulrich Drepper]

Xiaoyan He <address@hidden> writes:

> I am running on Redhat7.0. shm_open is POSIX shared memory function, not
> System V shm. I believe that "System V IPC" is enabled in the kernel
> configuration as I could use System V shm. I have heard that glibc2.1.9*
> has implemented POSIX shared memory. 

This is the case.  RH7 comes by default with the 2.2 kernel, though.
The 2.4 version is needed for POSIX shm.  There is an RPM included to
use the new kernel.  Once you switch the shmfs filesystem must be
mounted at /dev/shm.  Don't know whether the RPM does this or not.

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