On Tue, 16 Jan 2007 13:57:38 -0500 Jeff Layton <jlayton@xxxxxxxxxx> wrote: > The questions are: > > 1) how much would this slow down lookups for these filesystems? > 2) is it enough to justify adding more infrastructure to avoid it? > > What might be best is to start with this approach and then only move to using > IDR or some other scheme if these extra inodes in the hashtable prove to be > problematic. > > I've done some cursory testing with this patch and the overhead of hashing > and unhashing the inodes with pipefs is pretty low -- just a few seconds of > system time added on to the creation and destruction of 10 million pipes (very > similar to the overhead that the IDR approach would add). What is the additional overhead, expressed in relative terms? ie: as a percentage? - 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
