I have been trying to use the STABLE branch of the cluster suite with vanilla 2.6.20 kernel, and everything seemed at first to work, my problem can be reproduced by this: mount a gfs filesystem anywhere.. do a sync, this sync will now just hang there .. If I unmount the filesystem in another terminal, the sync command will end.. .. dumping the kernel stack of sync shows that it is in __sync_inodes on __down_read, looking in the code it seems that is waiting for the s_umount semaphore (in the superblock).. Just tell me if you need any more information or if this is not the correct place for this.. Greetings, Asbjørn Sannes -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster