kernel/linux.git/include/trace/events/f2fs.h, branch linux-7.0.y

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: trace elapsed time for io_rwsem lock

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

Use f2fs_{down,up}_{read,write}_trace for io_rwsem to trace lock elapsed time. 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 node_write lock

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

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

f2fs: trace elapsed time for node_change lock

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

Use f2fs_{down,up}_read_trace for node_change 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

f2fs: add lock elapsed time trace facility for f2fs rwsemphore

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

This patch adds lock elapsed time trace facility for f2fs rwsemphore. If total elapsed time of critical region covered by lock exceeds a threshold, it will print tracepoint to dump information of lock related context, including: - thread information - CPU/IO priority - lock information - elapsed time - total time - running time (depend on CONFIG_64BIT) - runnable time (depend on CONFIG_SCHED_INFO and CONFIG_SCHEDSTATS) - io sleep time (depend on CONFIG_TASK_DELAY_ACCT and /proc/sys/kernel/task_delayacct) - other time (by default other time will account nonio sleep time, but, if above kconfig is not defined, other time will include runnable time and/or io sleep time as wll) output: f2fs_lock_elapsed_time: dev = (254,52), comm: sh, pid: 13855, prio: 120, ioprio_class: 2, ioprio_data: 4, lock_name: cp_rwsem, lock_type: rlock, total: 1000, running: 993, runnable: 2, io_sleep: 0, other: 5 Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: add a tracepoint to see large folio read submission

2025-12-16T00:46:49+00:00

For example, 1327.539878: f2fs_preload_pages_start: dev = (252,16), ino = 14, i_size = 4294967296 start: 0, end: 8191 1327.539878: page_cache_sync_ra: dev=252:16 ino=e index=0 req_count=8192 order=9 size=0 async_size=0 ra_pages=4096 mmap_miss=0 prev_pos=-1 1327.539879: page_cache_ra_order: dev=252:16 ino=e index=0 order=9 size=4096 async_size=2048 ra_pages=4096 1327.541895: f2fs_readpages: dev = (252,16), ino = 14, start = 0 nrpage = 4096 1327.541930: f2fs_lookup_extent_tree_start: dev = (252,16), ino = 14, pgofs = 0, type = Read 1327.541931: f2fs_lookup_read_extent_tree_end: dev = (252,16), ino = 14, pgofs = 0, read_ext_info(fofs: 0, len: 1048576, blk: 4221440) 1327.541931: f2fs_map_blocks: dev = (252,16), ino = 14, file offset = 0, start blkaddr = 0x406a00, len = 0x1000, flags = 2, seg_type = 8, may_create = 0, multidevice = 0, flag = 0, err = 0 1327.541989: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 0, nr_pages = 512, dirty = 0, uptodate = 0 1327.542012: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 512, nr_pages = 512, dirty = 0, uptodate = 0 1327.542036: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 1024, nr_pages = 512, dirty = 0, uptodate = 0 1327.542080: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 1536, nr_pages = 512, dirty = 0, uptodate = 0 1327.542127: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 2048, nr_pages = 512, dirty = 0, uptodate = 0 1327.542151: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 2560, nr_pages = 512, dirty = 0, uptodate = 0 1327.542196: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 3072, nr_pages = 512, dirty = 0, uptodate = 0 1327.542219: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 3584, nr_pages = 512, dirty = 0, uptodate = 0 1327.542239: f2fs_submit_read_bio: dev = (252,16)/(252,16), rw = READ(R), DATA, sector = 33771520, size = 16777216 1327.542269: page_cache_sync_ra: dev=252:16 ino=e index=4096 req_count=8192 order=9 size=4096 async_size=2048 ra_pages=4096 mmap_miss=0 prev_pos=-1 1327.542289: page_cache_ra_order: dev=252:16 ino=e index=4096 order=9 size=4096 async_size=2048 ra_pages=4096 1327.544485: f2fs_readpages: dev = (252,16), ino = 14, start = 4096 nrpage = 4096 1327.544521: f2fs_lookup_extent_tree_start: dev = (252,16), ino = 14, pgofs = 4096, type = Read 1327.544521: f2fs_lookup_read_extent_tree_end: dev = (252,16), ino = 14, pgofs = 4096, read_ext_info(fofs: 0, len: 1048576, blk: 4221440) 1327.544522: f2fs_map_blocks: dev = (252,16), ino = 14, file offset = 4096, start blkaddr = 0x407a00, len = 0x1000, flags = 2, seg_type = 8, may_create = 0, multidevice = 0, flag = 0, err = 0 1327.544550: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 4096, nr_pages = 512, dirty = 0, uptodate = 0 1327.544575: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 4608, nr_pages = 512, dirty = 0, uptodate = 0 1327.544601: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 5120, nr_pages = 512, dirty = 0, uptodate = 0 1327.544647: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 5632, nr_pages = 512, dirty = 0, uptodate = 0 1327.544692: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 6144, nr_pages = 512, dirty = 0, uptodate = 0 1327.544734: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 6656, nr_pages = 512, dirty = 0, uptodate = 0 1327.544777: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 7168, nr_pages = 512, dirty = 0, uptodate = 0 1327.544805: f2fs_read_folio: dev = (252,16), ino = 14, DATA, FILE, index = 7680, nr_pages = 512, dirty = 0, uptodate = 0 1327.544826: f2fs_submit_read_bio: dev = (252,16)/(252,16), rw = READ(R), DATA, sector = 33804288, size = 16777216 1327.544852: f2fs_preload_pages_end: dev = (252,16), ino = 14, i_size = 4294967296 start: 8192, end: 8191 Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: optimize trace_f2fs_write_checkpoint with enums

2025-12-04T02:00:06+00:00

This patch optimizes the tracepoint by replacing these hardcoded strings with a new enumeration f2fs_cp_phase. 1.Defines enum f2fs_cp_phase with values for each checkpoint phase. 2.Updates trace_f2fs_write_checkpoint to accept a u16 phase argument instead of a string pointer. 3.Uses __print_symbolic in TP_printk to convert the enum values back to their corresponding strings for human-readable trace output. This change reduces the storage overhead for each trace event by replacing a variable-length string with a 2-byte integer, while maintaining the same readable output in ftrace. Signed-off-by: YH Lin Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim