Hello, On Tue, Apr 23, 2024 at 12:48:06AM +0800, Kemeng Shi wrote: > Add /sys/kernel/debug/bdi/xxx/wb_stats to show per group writeback stats > of bdi. > > Following domain hierarchy is tested: > global domain (320G) > / \ > cgroup domain1(10G) cgroup domain2(10G) > | | > bdi wb1 wb2 > > /* per wb writeback info of bdi is collected */ > cat /sys/kernel/debug/bdi/252:16/wb_stats > WbCgIno: 1 > WbWriteback: 0 kB > WbReclaimable: 0 kB > WbDirtyThresh: 0 kB > WbDirtied: 0 kB > WbWritten: 0 kB > WbWriteBandwidth: 102400 kBps > b_dirty: 0 > b_io: 0 > b_more_io: 0 > b_dirty_time: 0 > state: 1 > WbCgIno: 4094 > WbWriteback: 54432 kB > WbReclaimable: 766080 kB > WbDirtyThresh: 3094760 kB > WbDirtied: 1656480 kB > WbWritten: 837088 kB > WbWriteBandwidth: 132772 kBps > b_dirty: 1 > b_io: 1 > b_more_io: 0 > b_dirty_time: 0 > state: 7 > WbCgIno: 4135 > WbWriteback: 15232 kB > WbReclaimable: 786688 kB > WbDirtyThresh: 2909984 kB > WbDirtied: 1482656 kB > WbWritten: 681408 kB > WbWriteBandwidth: 124848 kBps > b_dirty: 0 > b_io: 1 > b_more_io: 0 > b_dirty_time: 0 > state: 7 > > Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx> Maybe it'd be useful to delineate each wb better in the output? It's a bit difficult to parse visually. Other than that, Acked-by: Tejun Heo <tj@xxxxxxxxxx> Thanks. -- tejun
