On Wed, 11 Jul 2007, Al Viro wrote:
> BTW, read() or write() in progress might get rather unhappy if your
> live replacement of ->f_mapping races with them...
For writes, we (1) never start any new operations after we've cleaned up
the file descriptor tables so (2) after we're done with do_fsync() we
never touch ->f_mapping again.
But for reads, I think there's a problem if we're in
do_generic_mapping_read() doing invalidate_inode_pages2() is not enough
because we're hanging on to the real mapping. Hmm.
Pekka
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