On Tue, 14 Oct 2003, Joseph V Moss wrote:
> The limit is 800 as others have stated. Although, it can be less than that
> if something else is already using up some of the reserved UDP ports.
>
> I wrote a patch long ago against a 2.2.x kernel to enable it to use
> multiple majors for NFS mounts (like the patches now common in several
> distros). I then ran into the 800 limit in the RPC layer. After changing
> the RPC layer to count up from 0, instead of down from 800, with no real
> upper limit, I was able to mount more than 2000 NFS filesystems simultaneously.
> I'm sure I could have done many thousand if I had had that many filesystems
> around to mount. Obviously, after 1024, it wasn't using reserved ports
> anymore, but it didn't seem to matter.
>
> Unfortunately, while the changes to NFS were easy to port to the 2.4 kernel,
> the RPC layer is different enough between 2.2 and 2.4 that it didn't work
> right off. Bumping it up to somewhere around 1024 should work, but using
> non-reserved ports didn't seem to work when I made a simple attempt.
>
> Of course, the real fix for the NFS layer is the expansion of the minor
> numbers that's already occurred in 2.6 and the RPC layer problems should
> be fixed by multiplexing multiple mounts on the same port.
>
>
I don't see that expansion in 2.6 (test6). It looks to me like the
allocation is done in set_anon_super (in fs/super.c) and that looks like
it is restricted to 256. Please correct this for me. I can't see how there
is any change to the number of unnmaed devices.
--
,-._|\ Ian Kent
/ \ Perth, Western Australia
*_.--._/ E-mail: [EMAIL PROTECTED]
v Web: http://themaw.net/
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