On Sat, Mar 19, 2016 at 06:45:19PM -0700, Linus Torvalds wrote:
It actually does seem to do that, although in an admittedly rather
questionable way.
I think it should use path_openat() rather than do_filp_open(), but
passing in LOOKUP_RCU to do_filp_open() actually does work: it just
means that the retry after ECHILD/ESTALE will just do it *again* with
LOOKUP_RCU. It won't fall back to non-rcu mode, it just won't or in
the LOOKUP_RCU flag that is already set.
What would make unlazy_walk() fail? And if it succeeds, you are not
in RCU mode anymore *without* restarting from scratch...
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>