Subject: Re: [linux-audio-dev] shared memory
From: Stephane Letz (letz_AT_grame.fr)
Date: Wed Mar 22 2000 - 18:17:04 EET
>for those not following linux-kernel, i just read my first explanation
>of the new "shm" filesystem. given some of benno's experiments in the
>server/client arena for audio, i thought this may be of interest.
>
>the shm filesystem is not finished yet, but it may at some point
>provide a standard unix (open/read/write/close) interface to shared
>memory. you open a file that is named according to its typical SysV
>IPC shm ID ("key"). right now, i think that you can only map the
>resulting file, but someone has just raised the idea of implementing
>read/write as well.
>
>yes, you can get a similar effect by just wrapping mmap-access to a
>file and shm-access to shared memory in your own layer, but i thought
>that this was interesting.
>
>--p
Concerning shared memory, does anbybody know if a shared memory segment
allocated in different user space can be "seen" (mapped) in a module
kernel? I'm using shared memory to implement IPC between user clients but i
need also to access this memory in a kernel module? Is this possible?
Thanks
Stephane Letz
Grame: Centre National de creation musicale
9, Rue du Garet
69001 Lyon
Tel: 04-72-07-37-00
Fax: 04-72-07-37-01
Web: www.grame.fr
This archive was generated by hypermail 2b28 : Wed Mar 22 2000 - 17:05:37 EET