https://bugzilla.suse.com/show_bug.cgi?id=1199970 Bug ID: 1199970 Summary: reaim-io-disk ext4 regression in 5.18 in mballoc Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: jack@suse.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Marvin has bisected a small (5%) performance regression in ext4 due to commit 077d0c2c78df ("ext4: make mb_optimize_scan performance mount option work with extents"). The bisection result looks like: good-27b38686 bad-077d0c2c Hmean disk-1 537.83 529.10 Hmean disk-5 3433.28 3431.71 ... Hmean disk-25 16999.09 16290.18 * -3.67%* Hmean disk-29 19162.99 18385.46 * -4.73%* Hmean disk-33 21859.13 20793.95 * -4.54%* The regression was reported on laurel1. Likely the overhead of mballoc has somewhat increased due to rbtree searching of best group to use. -- You are receiving this mail because: You are the assignee for the bug.