Re: aio openat Re: [PATCH 07/13] aio: enabled thread based async fsync
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: 2016-03-20 01:55:11
Also in:
linux-fsdevel, linux-mm, lkml
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>