On Tue, Feb 20, 2007 at 10:46:51AM -0500, Robert Rappaport wrote: > Thank you both for your helpful replies. In particular, the addition > of the calls to file system specific functions in routines, > fcntl_setlease() and break_lease(), as well as the modifications to > the file_operations and inode_operations structures, pointed to by > Bruce's reply, look exactly like the hooks that I would need to > proceed to resolve my problems. Is there any timetable established > for these modifications to make it into a future release? These hooks > would clearly benefit any cluster file system that has to deal with > leases. We did an experimental distributed lease implementation in gfs(1) a while ago. It worked, but was so extremely expensive that there was no point in considering it seriously. The problem is that _every_ open and close of every file requires a new dlm lock operation. Leases require knowledge about the cluster-wide opened/closed state of files, not only that but the mode they're open in. Dave - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
