On Mon, 2007-02-19 at 21:09 +0100, Jan Engelhardt wrote: > Hello, > > > simple_lookup() in fs/libfs.c does some extra steps, namely > > dentry->d_op = &simple_dentry_operations; > d_add(dentry, NULL); > > as far as I understand, this creates a negative dentry which will be > deleted sometime later again. Is not it easier to not create it at all > (since it is not going to be existent anyway)? I'm not sure I understand the question, so allow me to restate a similar question, and you can tell me if we're asking the same thing. In general, the negative dentry avoids the overhead of looking up a non-existent entry more than once by "remembering" that the entry does not exist. Since there is almost no overhead to calling simple_lookup(), would be be better off simply returning without creating the negative dentry (and letting simple_lookup be called more often)? Shaggy -- David Kleikamp IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
