13 Jan
2012
13 Jan
'12
7:19 p.m.
On Fri, Jan 13, 2012 at 9:06 AM, Miklos Szeredi miklos@szeredi.hu wrote:
From: Tejun Heo htejun@gmail.com
This implements memory mapping of char devices.
I don't think this is how you want to do it.
It seems to maintain a page list of its own, and do the magic page fault etc behavior. Which to me smells like a really bad design.
I would expect that what you actually want to do is to expose it as a shared mmap, and depend on all the normal shmem support. Is there any reason not to do that?
I guess you don't generally have big mappings, so an argument like "that way you can page out pages etc" may not strike you as a very strong argument, but I'd still prefer to at least see that approach explored. Hmm?
Linus