From: "Alexander Viro" <aviro@redhat.com>
> >
> > ->i_sem ->i_zombie
> > yes no lookup()
> > yes yes readdir(),create(),mknod(),mkdir(),symlink()
Al, could you explain why readdir acquires i_zombie? It only reads from the
directory, it should be similar to lookup().
> Another thing is that directory-moving rename()s within the same
filesystem
> are serialized (different filesystems are independent, indeed).
>
AFAIKS it should be possible to reorder
down(&s_vfs_rename_sem);
is_subdir()
triple_down(...)
to
triple_down();
down(&s_vfs_rename_sem);
is_subdir();
[I'm sure there is a problem, but I don't see it]
s_vfs_rename_sem is the global semaphore, we should try to hold is as short
as possible.
--
Manfred
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This archive was generated by hypermail 2b29 : Mon May 15 2000 - 21:00:21 EST