Bruce Nagel <[email protected]> writes: > On Fri, 28 Dec 2018, Michael van Elst wrote: > >> Date: Fri, 28 Dec 2018 08:45:15 -0000 (UTC) >> From: Michael van Elst <[email protected]> >> To: [email protected] >> Newsgroups: lists.netbsd.users >> Subject: Re: Issue mounting USB mass-storage drive > >> [email protected] (Bruce Nagel) writes: > >>> umass0: failed to create xfers > >> Usually means the kernel ran out of (contigous) memory. This can be >> a consequence of using USB3, the xhci driver does not support >> multi-segment DMA yet. > >> It should only happen after some larger uptime when kernel memory >> might be too fragmented. > > 'Turning it off and back on' did resolve the issue, so probably 'myth > confirmed'. :-) I had an uptime beyond a month when this issue presented > itself. Trying again the next day after rebooting allowed mounting the > drive it is still working okay. > > I'm guessing there isn't a simple means to use USB2 drivers and avoid this > issue? Nothing in the case is newer than 2012 so I don't need USB3 > support. > > Thanks, > Bruce
I see this with a USB2 8.x only system, so simply not doing USB3 may not really help the situation. My more -current systems with USB3 actually do not exhibit this issue at all, but they also have a lot more memory. -- Brad Spencer - [email protected] - KC8VKS - http://anduin.eldar.org
