shared memory via /dev/shm?

Nicholas Murphy halcyonic at
Fri Jul 31 19:16:14 EDT 2015

Hmm…I suppose not.  I’d would still be curious what the right way to do this is, though?  I think I can get away with that trick, but I can also imagine scenarios where I’d want the kernel module itself to create the file.


> On Jul 30, 2015, at 5:00 PM, Valdis.Kletnieks at wrote:
> 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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