I've never observed such absurd IRQ rates myself. Now, "8000" is an interesting number since there are 1000 USB frames per second, and 8 microframes per frame ... so you might be able to make this better by "modprobe ehci-hcd log2_irq_thresh=3" to change the IRQ latency from 1 microframe to 8. On Monday 05 May 2008, Alan Stern wrote: > One thing you can do is to mount a debugfs filesystem, and under it go > to the EHCI directory corresponding to the controller your drive is > plugged into. The contents of the "registers" and "async" files would > be interesting -- particularly if you get them while the disk is idle. > > You might even try looking at "registers" several times in a row, since > its contents may change over time. Exactly. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
