Hi, not sure if this is the place to ask. I'm getting a LOT of these messages:
[70679.212719] DMAR: Allocating 2048-page iova for 0000:00:14.0 failed [70679.508107] DMAR: Allocating 2048-page iova for 0000:00:14.0 failed [70679.779284] DMAR: Allocating 2048-page iova for 0000:00:14.0 failed ( 00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) ) This happens while writing random data to an USB drive (Seagate Backup Plus 6TB). # pv < /dev/urandom > /dev/usbdrive The drive is new and I like to overwrite drives as a burn-in test, also as a pre-encryption wipe. This runs fine for an hour or two (a hundred gigs), then speed drops by more than half, 'top' shows usb-storage process eating CPU, mouse pointer and keyboard get sluggish, and then a while later, these console messages appear. So far the only thing that has helped get things back in order (for a while) is to reboot the machine entirely. I've no idea where to even start tackling this problem. Any suggestions? Thank you
