On Wed, 2007-12-19 at 17:22 -0500, Bill Davidsen wrote:

Peter Zijlstra wrote:

quoted

Hi,

Another posting of the full swap over NFS series. 

Andrew/Linus, could we start thinking of sticking this in -mm?

Two questions:
1 - what is the memory use impact on the system which don't do swap over 
NFS, such as embedded systems, and

It should have little to no impact if not used.

2 - what is the advantage of this code over the two existing network 
swap approaches, 

swapping to NFS mounted file and 

This is not actually possible with a recent kernel, current swapfile
support requires a blockdevice.

swap to NBD device?

I've used the NFS file when a program was running out of memory and that 
seemed to work, people in UNYUUG have reported that the nbd swap works, 
so what's better here?

swap over NBD works sometimes, its rather easy to deadlock, and its
impossible to recover from a broken connection.