This is a follow-on series from the thread "[lkp] [xfs] 68a9f5e700: aim7.jobs-per-min -13.6% regression" with active parties cc'd. I've pushed the series to git.kernel.org where the LKP robot should pick it up automatically.
git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-reclaim-contention-v1r15 The progression of this series has been unsatisfactory. Dave originally reported a problem with tree_lock contention and while it can be fixed by pushing reclaim to direct reclaim, it slows swap considerably and was not a universal win. This series is the best balance I've found so far between the swapping and large rewriter cases. I never reliably produced the same contentions that Dave did so testing is needed. Dave, ideally you would test patches 1+2 and patches 1+4 but a test of patches 1+3 would also be nice if you have the time. Minimally, I'm expected that patches 1+2 will help the swapping-to-fast-storage case (LKP to confirm independently) and may be worth considering on their own even if Dave's test case is not helped. drivers/block/brd.c | 1 + mm/vmscan.c | 209 +++++++++++++++++++++++++++++++++++++++++++++------- 2 files changed, 182 insertions(+), 28 deletions(-) -- 2.6.4
