On Thu, Jun 23, 2016 at 03:26:03PM -0400, [email protected] wrote: > From: Jeff Mahoney <[email protected]> > > While running xfstests generic/291, which creates a single file populated > with reflinks to the same extent, I found that fsck had been running for > hours. perf top lead me to find_data_backref as the culprit, and a litte > more digging made it clear: For every extent record we add, we iterate > the entire list first. My test case had ~2M records. That math doesn't > go well. > > This patchset converts the extent_backref list to an rbtree. The test > that used to run for more than 8 hours without completing now takes > less than 20 seconds. > > -Jeff > > --- > > Jeff Mahoney (3): > btrfs-progs: check: add helpers for converting between structures > btrfs-progs: check: supplement extent backref list with rbtree > btrfs-progs: check: switch to iterating over the backref_tree
Applied (with some trivial fixups), thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
