[Linux-cluster] Re: GFS
Pekka J Enberg
penberg at cs.helsinki.fi
Wed Aug 10 04:48:29 UTC 2005
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
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