I am experiencing slow I/O performance since kernel 5.0.1. File operations are many times slower than they used to be using kernel up to 4.20. The problem is present when I use an USB pendrive, and I am still doing some test to know if it also involves internal SATA to SATA data transfer.
You can see the discussion in the dar (backup software) mailing list , because I first noticed the problem using dar, but then discovered that also usual file operations such as “cp” suffer the same problem.
I would like some help to investigate it, or some advice to know if I would better file a bug. Or, may someone tell me if it is a known issue?
Many thanks in advance for your attention and help,
:[Thread: [Dar-support] dar became very slow (and process in D state?) | DAR - Disk ARchive](dar mailing list archive)
Running Fedora 29 on a Desktop PC.