From: Mingzhe Zou mingzhe.zou@easystack.cn

We found that after long run, the dirty_data of the bcache device will have errors. This error cannot be eliminated unless re-register.

We also found that reattach after detach, this error can accumulate.

In bch_sectors_dirty_init(), all inode <= d->id keys will be recounted again. This is wrong, we only need to count the keys of the current device.

Fixes: b144e45fc576 ("bcache: make bch_sectors_dirty_init() to be multithreaded") Signed-off-by: Mingzhe Zou mingzhe.zou@easystack.cn Cc: stable@vger.kernel.org Signed-off-by: Coly Li colyli@suse.de --- drivers/md/bcache/writeback.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c index c3e872e0a6f2..77fb72ac6b81 100644 --- a/drivers/md/bcache/writeback.c +++ b/drivers/md/bcache/writeback.c @@ -991,8 +991,11 @@ void bch_sectors_dirty_init(struct bcache_device *d) op.count = 0;

for_each_key_filter(&c->root->keys, - k, &iter, bch_ptr_invalid) + k, &iter, bch_ptr_invalid) { + if (KEY_INODE(k) != op.inode) + continue; sectors_dirty_init_fn(&op.op, c->root, k); + }

rw_unlock(0, c->root); return;