https://bugzilla.samba.org/show_bug.cgi?id=15123 --- Comment #1 from Forest <forestix@xxxxxxxxx> --- I can reliably reproduce it booting from this live USB image: kubuntu-22.04-desktop-amd64.iso My setup steps when using that live USB environment: sudo mount.cifs //myserver/dir ~/mnt/dir -o username=myuser,uid=999,gid=999 touch ~/mnt/dir/test{1..5} Tests and results: (My reproducer program is called xattrtest in these command lines.) # 1 thread is fast # (note the system call duration reported by strace in <> brackets) $ time ./xattrtest ~/mnt/dir/test{1..5} real 0m0.079s user 0m0.003s sys 0m0.000s $ strace -Te getxattr ./xattrtest ~/mnt/dir/test1 getxattr("/home/myuser/mnt/dir/test1", "user.baloo.rating", NULL, 0) = -1 ENODATA (No data available) <0.008482> # 2+ threads are slow $ time ./xattrtest -t 2 ~/mnt/dir/test{1..5} real 0m5.118s user 0m0.005s sys 0m0.000s $ strace -Te getxattr ./xattrtest -t 2 ~/mnt/dir/test1 getxattr("/home/myuser/mnt/dir/test1", "user.baloo.rating", NULL, 0) = -1 ENODATA (No data available) <1.018507> # 2+ threads are fast if I remount with the nouser_xattr option $ time ./xattrtest -t 2 ~/mnt/dir/test{1..5} real 0m0.061s user 0m0.002s sys 0m0.000s $ strace -Te getxattr ./xattrtest -t 2 ~/mnt/dir/test1 getxattr("/home/myuser/mnt/dir/test1", "user.baloo.rating", NULL, 0) = -1 EOPNOTSUPP (Operation not supported) <0.000048> -- You are receiving this mail because: You are the QA Contact for the bug.
