[Linux-cluster] Re: GFS

["Pekka J Enberg" <penberg cs helsinki fi>]

Zach Brown writes:
> But couldn't we use make_pages_present() to figure which locks we need, 
> sort them, and then grab them?

Doh, obviously we can't as nopage() needs to bring the page in. Sorry about 
that. 

I also thought of another failure case for the vma walk. When a thread uses 
userspace memcpy() between two clusterfs mmap'd regions instead of write() 
or read(). 

             Pekka