Re: 2.4.17:Increase number of anonymous filesystems beyond 256?

From: Trond Myklebust (trond.myklebust@fys.uio.no)
Date: Tue Jan 22 2002 - 10:40:41 EST


>>>>> " " == Rainer Krienke <krienke@uni-koblenz.de> writes:

> Can somebody explain the major difference between both
> solutions? Why did you Pete base your patch on 4 new major
> device numbers whereas Andis patch did not need them? Are there
> any major drawbacks involved not doing so?

Both Andi and Pete solve the problem of the limit on the number of
available reserved ports.

In addition, Pete fixes a second problem. There is a limit to the
number of 'unnamed' devices that the kernel can support (see the
function get_unnamed_dev()). Since each NFS mount 'eats' one such
device, this sets an upper limit of 255 simultaneous of NFS mounts
whether or not we have enough reserved ports.

Cheers,
   Trond
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