Hi, On Mon, Aug 31, 2015 at 01:50:10PM -0500, Felipe Balbi wrote: > > > > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > > > > > > > This reverts commit 8f2c9544aba636134303105ecb164190a39dece4. > > > > > > > > As it breaks g_ether on my Baytrail FFRD8 device. Everything starts out > > > > fine, but after a bit of data has been transferred it just stops > > > > flowing. > > > > > > > > Note that I do get a bunch of these "NOHZ: local_softirq_pending 08" > > > > when booting the machine, but I'm not really sure if they're related > > > > to this problem. > > > > > > I have a feeling your problem is elsewhere. We *are* completing one TRB > > > at a time. By reverting that commit you're just masking the real problem > > > and I'd rather get that one fixed. > > > > > > How do you reproduce your issue ? > > > > Just boot the system, it gets an IP from dnsmasq on my host, then I ssh > > into it and do something to produce a bit of console output, after which > > g_ether is dead. Eg. 'dmesg' a few times is enough to kill it. > > which kernel version ? Running as USB2 or USB3 ? Have you tried > linux-next ? I just did 1000 dmesg iterations over ssh with g_ether and > saw no issues. > > Can you enable dwc3 tracepoints and try again ? (use some very large > trace buffer, something around 2 or 4 MiB should be enough). you need this fix to avoid the WARN you'll see: https://git.kernel.org/cgit/linux/kernel/git/balbi/usb.git/commit/?h=testing/next&id=d5d0c75c3663b019063253a498fcc5ceec8dad7d -- balbi
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