On Fri, 2023-02-17 at 17:54 +0900, David Stevens wrote: > From: David Stevens <stevensd@xxxxxxxxxxxx> > > Fix two races in khugepaged+shmem that cause issues with userfaultfd > and > lseek, respectively. > > v3 -> v4: > - Base changes on mm-everything (fba720cb4dc0) > - Add patch to refactor error handling control flow in collapse_file > - Rebase userfaultfd patch with no significant logic changes > - Different approach for fixing lseek race > v2 -> v3: > - Use XA_RETRY_ENTRY to synchronize with reads from the page cache > under the RCU read lock in userfaultfd fix > - Add patch to fix lseek race > v1 -> v2: > - Different approach for userfaultfd fix > > David Stevens (3): > mm/khugepaged: refactor collapse_file control flow > mm/khugepaged: skip shmem with userfaultfd > mm/khugepaged: maintain page cache uptodate flag > > include/trace/events/huge_memory.h | 3 +- > mm/khugepaged.c | 263 ++++++++++++++++----------- > -- > 2 files changed, 144 insertions(+), 122 deletions(-) > Might want to Cc this to the stable mailing list. -- ~miko
