On Fri, Mar 01, 2013 at 11:26:51AM -0500, Theodore Ts'o wrote: > On Fri, Mar 01, 2013 at 11:11:30AM -0500, Dave Jones wrote: > > On Fri, Mar 01, 2013 at 12:00:29AM -0500, Theodore Ts'o wrote: > > > When the system is under memory pressure, ext4_es_srhink() will get > > > called very often. So optimize returning the number of items in the > > > file system's extent status cache by keeping a per-filesystem count, > > > instead of calculating it each time by scanning all of the inodes in > > > the extent status cache. > > > > > > Also rename the slab used for the extent status cache to be > > > "ext4_extent_status" so it's obviousl the slab in question is created > > > by ext4. > > > > Seems to work with no ill effects afaics. > > Thanks for reporting the problem and testing the fix! > > I'll add a Reported-by: and Tested-by: Dave Jones <davej@xxxxxxxxxx> > to the commit. (Unless of course you have an objection, in which case > let me know.) Sure, that's fine. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
