Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, 9 Jun 2016, M G Berberich wrote: > >> Hello, >> >> With 4.7-rc2, after detecting a USB Mass Storage device >> >> [ 11.589843] usb-storage 4-2:1.0: USB Mass Storage device detected >> >> a constant flow of kernel-BUGS is reported (several per second). >> >> [ 11.599215] BUG: using smp_processor_id() in preemptible [00000000] code: >> systemd-udevd/389 >> [ 11.599218] caller is debug_smp_processor_id+0x17/0x20 >> [ 11.599220] CPU: 4 PID: 389 Comm: systemd-udevd Not tainted 4.7.0-rc2 #6 >> [ 11.599220] Hardware name: Gigabyte Technology Co., Ltd. H87-HD3/H87-HD3, >> BIOS F10 08/18/2015 >> [ 11.599223] 0000000000000000 ffff88080466b6c8 ffffffff813fc42d >> 0000000000000004 >> [ 11.599224] ffffffff81cc1da3 ffff88080466b6f8 ffffffff8141a0f6 >> 0000000000000000 >> [ 11.599226] ffff880809fe8d98 0000000000000001 00000000000fffff >> ffff88080466b708 >> [ 11.599226] Call Trace: >> [ 11.599229] [<ffffffff813fc42d>] dump_stack+0x4f/0x72 >> [ 11.599231] [<ffffffff8141a0f6>] check_preemption_disabled+0xd6/0xe0 >> [ 11.599233] [<ffffffff8141a117>] debug_smp_processor_id+0x17/0x20 >> [ 11.599235] [<ffffffff814f0336>] alloc_iova_fast+0xb6/0x210 >> [ 11.599238] [<ffffffff819ed64f>] ? __wait_on_bit+0x6f/0x90 >> [ 11.599240] [<ffffffff814f388d>] intel_alloc_iova+0x9d/0xd0 >> [ 11.599241] [<ffffffff814f7c33>] __intel_map_single+0x93/0x190 >> [ 11.599242] [<ffffffff814f7d64>] intel_map_page+0x34/0x40 >> >> Please see https://bugzilla.kernel.org/show_bug.cgi?id=119801 for a >> more complete kernel-log > > This looks like a bug in the memory management subsystem. It should be > reported on the linux-mm mailing list (CC'ed). This bug is IOMMU related (mailing list CC’ed) and IIUC already fixed. Regards, Nadav -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
