On Tue, Jun 02, 2009 at 03:56:02PM -0700, Eric W. Biederman wrote: > Nick Piggin <npiggin@xxxxxxx> writes: > > >> In addition for a complete solution we need: > >> - A reliable way the file structures that we need to revoke. > >> - To wait for but not tamper with ongoing file creation and cleanup. > >> - A guarantee that all with user space controlled duration are removed. > >> > >> The file_hotplug_lock has a very unique implementation necessitated by > >> the need to have no performance impact on existing code. Classic locking > > > > Well, it isn't no performance impact. Function calls, branches, icache > > and dcache... > > Practically none. OK that's different from none. There is obviously overhead. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
