kernel/linux.git/fs/f2fs/checkpoint.c, branch v7.0.10

f2fs: sysfs: introduce critical_task_priority

2026-02-10T20:53:21+00:00

This patch introduces /sys/fs/f2fs//critical_task_priority, w/ this new sysfs interface, we can tune priority of f2fs_ckpt thread and f2fs_gc thread. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce trace_f2fs_priority_update

2026-01-31T03:24:55+00:00

This patch introduces two new tracepoints for debug purpose. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix lock priority inversion issue

2026-01-31T03:24:39+00:00

If userspace thread has held f2fs rw semaphore, due to its low priority, it could be runnable or preempted state for long time, during the time, it will block high priority thread which is trying to grab the same rw semaphore, e.g. cp_rwsem, io_rwsem... To fix such issue, let's detect thread's priority when it tries to grab f2fs_rwsem lock, if the priority is lower than a priority threshold, let's uplift the priority before it enters into critical region of lock, and restore the priority after it leaves from critical region. Meanwhile, introducing two new sysfs nodes: - /sys/fs/f2fs//adjust_lock_priority, it is used to control whether the functionality is enable or not. ========== ================== Flag_Value Flag_Description ========== ================== 0x00000000 Disabled (default) 0x00000001 cp_rwsem 0x00000002 node_change 0x00000004 node_write 0x00000008 gc_lock 0x00000010 cp_global 0x00000020 io_rwsem ========== ================== - /sys/fs/f2fs//lock_duration_priority, it is used to control priority threshold. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: add write latency stats for NAT and SIT blocks in f2fs_write_checkpoint

2026-01-27T02:45:58+00:00

This patch adds separate write latency accounting for NAT and SIT blocks in f2fs_write_checkpoint(). Signed-off-by: Yongpeng Yang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: clean up the type parameter in f2fs_sync_meta_pages()

2026-01-17T00:00:34+00:00

Clean up code to improve readability, no logic changes. Signed-off-by: Yangyang Zang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: sysfs: introduce inject_lock_timeout

2026-01-07T03:17:08+00:00

This patch adds a new sysfs node in /sys/fs/f2fs//inject_lock_timeout, it relies on CONFIG_F2FS_FAULT_INJECTION kernel config. It can be used to simulate different type of timeout in lock duration. ========== =============================== Flag_Value Flag_Description ========== =============================== 0x00000000 No timeout (default) 0x00000001 Simulate running time 0x00000002 Simulate IO type sleep time 0x00000003 Simulate Non-IO type sleep time 0x00000004 Simulate runnable time ========== =============================== Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce FAULT_LOCK_TIMEOUT

2026-01-07T03:17:08+00:00

This patch introduce a new fault type FAULT_LOCK_TIMEOUT, it can be used to inject timeout into lock duration. Timeout type can be set via /sys/fs/f2fs//inject_timeout_type Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: trace elapsed time for cp_global_sem lock

2026-01-07T03:17:07+00:00

Use f2fs_{down,up}_write_trace for cp_global_sem to trace lock elapsed time. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: trace elapsed time for gc_lock lock

2026-01-07T03:17:07+00:00

Use f2fs_{down,up}_write_trace for gc_lock to trace lock elapsed time. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: trace elapsed time for cp_rwsem lock

2026-01-07T03:17:06+00:00

Use f2fs_{down,up}_read_trace for cp_rwsem to trace lock elapsed time. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim