Messages in this thread | | | Date | Sun, 12 Mar 2006 20:47:36 -0800 | From | Andrew Morton <> | Subject | Re: 2.6.16-rc6-mm1 (NFS tree ... busy inodes ... relatively harmless) |
| |
Neil Brown <neilb@suse.de> wrote: > > On Sunday March 12, akpm@osdl.org wrote: > > > > - The NFS tree is a bit sick - you may see the `busy inodes - self destruct > > in five seconds" message when performing NFS unmounts. It seems relatively > > harmless. > > I think the term is "mostly harmless" ... see the entry for "Earth" in > The Hitch-Hikers Guide To The Galaxy... :-) > > I don't believe this is harmless at all, and I have an oops to prove > it - though it is with NFSv4 which is still EXPERIMENTAL. > > I don't believe it is an NFS bug at all, but a VFS bug. It happens > more with NFS because iput on nfs can be a lot slower due to the > required network activity, so the race is easier to hit.
It's 100% repeatable for me, with nfsv3 unmounts. First the busy inodes, then a use-after-free oops if CONFIG_DEBUG_PAGEALLOC (if that workaround patch I have in there isn't applied).
Not a race, methinks.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |