Messages in this thread | | | Date | Thu, 26 Oct 2006 23:19:56 +0200 | From | Avi Kivity <> | Subject | Re: rename() contention (BUG?) |
| |
Al Viro wrote: > On Thu, Oct 26, 2006 at 08:43:34PM +0200, Avi Kivity wrote: > >> The changes make the mutex more efficient, but won't decrease the >> contention. It seems that all renames in one filesystem are serialized, >> and if the renames require I/O (which is certainly the case with nfs), >> rename throughput is severely limited. >> > > They are, and for a good reason. For details see > Documentation/filesystems/directory-locking. >
Is it possible to lock only the common subtree of the two paths?
Perhaps walk towards the root of the tree, starting with the deeper path, locking one component at a time. Then walk both paths together locking components ordered by something to avoid deadlock.
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
- 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/
| |