On 5/29/23 21:51, Xiao Ni wrote:
I can reproduce this after setting /sys/block/md126/queue/iostats to
0. But if I comment md_account_bio, this can't be reproduced. If
setting iostats to 0, md_account_bio only checks the bit
QUEUE_FLAG_IO_STAT of the request queue of md126.
I don't get why the issue can't be reproduced after comment md_acount_bio
out manually, the only difference between it and disable iostats is that
chunk
aligned read bio still record time.
In chunk_aligned_read, it can split the original bio and returns the
split bio if it can't do the align read. Are there problems in this
case?
Not sure.
Thanks,
Guoqing
