Ceph Kernel client bad performance for 5.4

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Hi, guys,


I'm using ceph nautilus in my production,  the kernel clients include 5.4 and 4.15, I found a problem in 5.4 sometimes: It's slower than fuse, but when I changed it
to 4.15, it's recovered.
for 5.4:
root@WXRG0432:/mnt/test# rsync -ahHv --progress /root/test test-1
sending incremental file list
test
         58.56M   5%    2.82MB/s    0:05:43  ^C
for 4.15:
root@WXRG0433:/mnt/test# rsync -ahHv --progress /root/test  test-2
sending incremental file list
test
          1.05G 100%  316.25MB/s    0:00:03 (xfr#1, to-chk=0/1)

sent 1.05G bytes  received 35 bytes  299.67M bytes/sec
Anyone have met the same problems with me?




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