On 04/27/2013 02:37 PM, Alex Elder wrote: > This series ends with a patch that avoids a race involving the > initial read of an rbd image header and a change to the snapshot > context. The problem occurs because the rbd client sets up its > watch request on the header object *after* the initial header > read, and if the snapshot context changes between them the > kernel client snapshot context will not be up-to-date. This series is available in the "review/wip-rbd-cleanup-4" in the ceph-client git repository, which is based on branch "review/wip-rbd-cleanup-3". -Alex > The fix is to set up the watch before doing the initial > header read. The recent patches, along with the patches > in this series, make doing things in this order possible. > > -Alex > > [PATCH 1/5] rbd: move more initialization into rbd_dev_probe_image() > [PATCH 2/5] rbd: define rbd_header_name() > [PATCH 3/5] rbd: don't clean up watch in device release function > [PATCH 4/5] rbd: don't bother checking whether order changes > [PATCH 5/5] rbd: set up watch in rbd_dev_probe_image() > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
