So this patch set addresses a few minor issues I have found and is based on the lrunext branch of the tree at: https://github.com/alexshi/linux.git The first three patches address various issues if ound with the patch set such as the fact that we were skipping non-LRU compound pages one 4K page at a time, the fact that test_and_set_skip had been made redundant by the fact that the LRU bit made the setting of the bit exclusive per pageblock, and the fact that we were using put_page while holding the LRU lock. The last two patches are some patches I have been experimenting with. Basically trying to reduce the number of times the LRU lock has to be released and reacquired by batching LRU work together, or deferring the freeing/returning of pages to LRU in the case of move_pages_to_lru. I am still working on generating data but for the fourth patch I have seen an improvement of about 5% on the will-it-scale/page_fault2 test with THP enabled by default, however that is just some preliminary data and I still have a number of tests left to run. --- Alexander Duyck (5): mm: Identify compound pages sooner in isolate_migratepages_block mm: Drop use of test_and_set_skip in favor of just setting skip mm: Add explicit page decrement in exception path for isolate_lru_pages mm: Split release_pages work into 3 passes mm: Split move_pages_to_lru into 3 separate passes mm/compaction.c | 84 +++++++++++++++--------------------------- mm/swap.c | 109 ++++++++++++++++++++++++++++++++++--------------------- mm/vmscan.c | 77 +++++++++++++++++++++++---------------- 3 files changed, 142 insertions(+), 128 deletions(-) --
