Hi, This series uses the pte marker to replace the swapin error swap entry, then we safe one more swap entry. A new pte marker bit is defined. One thing worth mentioning: we need the pte marker to be always built to make sure it works like before, so I made an attempt in patch 1 to drop CONFIG_PTE_MARKER and always compile pte marker in. Since pte markers are enabled in many distributions by default already, meanwhile the codeset is really small I assume it's fine. But still I'm tagging with RFC for this initial version. Smoke tested on anonymous mem on a fake swap failure. Please have a look, thanks. Peter Xu (2): mm: Always compile in pte markers mm: Use pte markers for swap errors include/linux/swap.h | 16 ++++---------- include/linux/swapops.h | 49 +++++++++-------------------------------- mm/Kconfig | 7 ------ mm/memory.c | 13 ++++++----- mm/shmem.c | 2 +- mm/swapfile.c | 2 +- 6 files changed, 23 insertions(+), 66 deletions(-) -- 2.37.3
