On Thu, Sep 5, 2024 at 12:21 AM Chris Li <chrisl@xxxxxxxxxx> wrote: > > I found a regression on mm-unstable during my swap stress test, > using tmpfs to compile linux. The test OOM very soon after > the make spawns many cc processes. > > It bisects down to this change: 33dfe9204f29b415bbc0abb1a50642d1ba94f5e9 > (mm/gup: clear the LRU flag of a page before adding to LRU batch) > > Yu Zhao propose the fix: "I think this is one of the potential side > effects -- Huge mentioned earlier about isolate_lru_folios():" > > I test that with it the swap stress test no longer OOM. > > Link: https://lore.kernel.org/r/CAOUHufYi9h0kz5uW3LHHS3ZrVwEq-kKp8S6N-MZUmErNAXoXmw@xxxxxxxxxxxxxx/ > Fixes: 33dfe9204f29 ("mm/gup: clear the LRU flag of a page before adding to LRU batch") > Suggested-by: Yu Zhao <yuzhao@xxxxxxxxxx> > Suggested-by: Hugh Dickins <hughd@xxxxxxxxxx> > Tested-by: Chris Li <chrisl@xxxxxxxxxx> > Signed-off-by: Chris Li <chrisl@xxxxxxxxxx> Closes: https://lore.kernel.org/56651be8-1466-475f-b1c5-4087995cc5ae@xxxxxxxxxxxxx/
