On Tue, Feb 04, 2020 at 03:25:06PM +0100, Jan Kara wrote: > Hello, > > conversion of page cache to xarray (commit 69b6c1319b6 "mm: Convert truncate to > XArray" in particular) has regressed performance of page cache truncation > by about 10% (see my original report here [1]). This patch series aims at > improving the truncation to get some of that regression back. > > The first patch fixes a long standing bug with xas_for_each_marked() that I've > uncovered when debugging my patches. The remaining patches then work towards > the ability to stop clearing marks in xas_store() which improves truncation > performance by about 6%. > > The patches have passed radix_tree tests in tools/testing and also fstests runs > for ext4 & xfs. I've tested the patchset on btrfs too, no problems found.
