XPost: alt.os.linux   
   From: p_d_a_s_i_l_v_a_ns@nonetnoaddress.pt   
      
   Hi!   
      
   I have a USB external backup volume with btrfs.   
   The backup script is a simple cp -al   followed by a rsync   
   to update .   
      
   The cp -al took 10-20 mins. in kernel 5.13 and before that.   
   Now, with 5.15, without any changes, it is taking a few hours!!   
      
   NOTES:   
   I have noticed that before, during the cp -al there were outputs to the   
   memory cache during which we could "visit" the drive followed by periods   
   of flushing where a simple attempt to change to another dir took a while   
   (sometimes ~1 min).   
      
   Now, I can always navigate inside the drive without any delay when cp   
   -al is in course! It seems like there is no memory cache although the   
   memory cache still grows and shrinks.   
      
   BTW, my mount command is   
   mount /dev/mapper/TEMP /mnt1 -onoatime,compress-force=zstd   
      
   There is an encryption layer below the fs.   
      
   Thanks for any comments.   
   Paulo   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)