shared memory via /dev/shm?

Valdis.Kletnieks at Valdis.Kletnieks at
Thu Jul 30 20:00:01 EDT 2015

On Thu, 30 Jul 2015 16:03:51 -0700, Nicholas Murphy said:

> Yes, I’ve read all the disclaimers against accessing files in the kernel, but
> I want to set up a shared memory segment between a kernel module and one or
> more user processes, and /dev/shm seems like a good way to do that.

Is there a specific reason you aren't letting the userspace program create
an mmap() area and then write the identifying information to a /sys attribute
file (or other means of notifying the kernel of what to use)?
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