On Thu, 16 Apr 2015, Dorian Gray wrote: > I have tested the following kernel versions: > - 3.18.4, 3.18.6, 3.18.7, 3.19.4 [all affected] > - 3.17.1 [unaffected] > - 3.17.8 [probably the last unaffected version; I'm using it currently] > > Also, I've been using the very same configuration (hardware) along > with 2.6.x, 3.2.x, 3.4.x, 3.10.x and have never encountered such a > behavior before. > > And the problem is: > > When at least one external drive is plugged-in AND mounted, after ~2-4 > hours the following occurs (@11315.681561): > > [ 5570.110523] usb 2-1.2: new high-speed USB device number 5 using ehci-pci > [ 5570.852917] usb 2-1.2: New USB device found, idVendor=1058, idProduct=0730 > [ 5570.852923] usb 2-1.2: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [ 5570.852927] usb 2-1.2: Product: My Passport 0730 > [ 5570.852930] usb 2-1.2: Manufacturer: Western Digital > [ 5570.852933] usb 2-1.2: SerialNumber: > [ 5570.853517] usb-storage 2-1.2:1.0: USB Mass Storage device detected > [ 5570.853691] scsi host8: usb-storage 2-1.2:1.0 > [ 5572.932659] scsi 8:0:0:0: Direct-Access WD My Passport > 0730 1012 PQ: 0 ANSI: 6 > [ 5572.933013] sd 8:0:0:0: Attached scsi generic sg5 type 0 > [ 5575.306801] scsi 8:0:0:1: Enclosure WD SES Device > 1012 PQ: 0 ANSI: 6 > [ 5575.307160] sd 8:0:0:0: [sdc] 976707584 512-byte logical blocks: > (500 GB/465 GiB) > [ 5575.308405] sd 8:0:0:0: [sdc] Write Protect is off > [ 5575.308416] sd 8:0:0:0: [sdc] Mode Sense: 47 00 10 08 > [ 5575.309772] sd 8:0:0:0: [sdc] No Caching mode page found > [ 5575.309776] sd 8:0:0:0: [sdc] Assuming drive cache: write through > [ 5575.311176] scsi 8:0:0:1: Attached scsi generic sg6 type 13 > [ 5575.328540] sdc: sdc1 > [ 5575.331026] sd 8:0:0:0: [sdc] Attached SCSI disk > [11315.681561] ehci-pci 0000:00:1d.0: swiotlb buffer is full (sz: 32768 bytes) > [11315.681565] DMA: Out of SW-IOMMU space for 32768 bytes at device 0000:00:1d.0 > [11315.681874] ehci-pci 0000:00:1d.0: swiotlb buffer is full (sz: 32768 bytes) > [11315.681876] DMA: Out of SW-IOMMU space for 32768 bytes at device 0000:00:1d.0 > [11315.682171] ehci-pci 0000:00:1d.0: swiotlb buffer is full (sz: 32768 bytes) > [11315.682174] DMA: Out of SW-IOMMU space for 32768 bytes at device 0000:00:1d.0 > [...and so on...] This appears to be a problem with the IOMMU or SWIOTLB subsystems, not the USB subsystem. I have CC'ed the appropriate mailing lists. Alan Stern -- 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
