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SubjectRe: [patch 01/10] vfs: add path_create() and path_mknod()
On Thu, Apr 03, 2008 at 12:40:43AM +0100, Al Viro wrote:
> Anyway, what the hell for? It's more complex and buys you nothing
> useful.

BTW, what it gives you is an extra headache for scenarios like

task A:
write(fd, ...)
task B: /* shares descriptor table with A */
close(fd)
task C: umount(<mountpoint of tree where fd is>)
...
task A: still writing

At the very least, you want "that thing is still busy" on normal umount -
we are still in the middle of write(2) and hell knows how long it's going
to last. So you need to play with refcount of vfsmount in a very nasty
way, for all your pains. Again, what for?


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