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(-) -- 2.39.2.637.g21b0678d19-goog
