Date: Wed, 22 Nov 2006 13:30:21 GMT From: Scott Mitchell <rsm@FreeBSD.org> To: freebsd-usb@FreeBSD.org Subject: Re: usb/81621: external hd hangs under load on ehci Message-ID: <200611221330.kAMDULC0058804@freefall.freebsd.org>
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The following reply was made to PR usb/81621; it has been noted by GNATS. From: Scott Mitchell <rsm@FreeBSD.org> To: bug-followup@FreeBSD.org Cc: Subject: Re: usb/81621: external hd hangs under load on ehci Date: Wed, 22 Nov 2006 13:20:16 +0000 A few more observations on this problem. Firstly it seems that Ian's patch for VIA EHCI controllers is already in 6.1, so that clearly isn't helping in this case at least. I also ran a few more tests with 3 different machines and all the USB 2.0 devices I could scrape together. The machines and their EHCI controllers are: #1 FreeBSD llama.fishballoon.org 6.1-SECURITY FreeBSD 6.1-SECURITY #0: Mon Aug 28 05:21:08 UTC 2006 root@builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386 ehci0: <VIA VT6202 USB 2.0 controller> mem 0xdf102000-0xdf1020ff irq 12 at device 16.3 on pci0 ehci0: [GIANT-LOCKED] usb3: EHCI version 1.0 usb3: companion controllers, 2 ports each: usb0 usb1 usb2 usb3: <VIA VT6202 USB 2.0 controller> on ehci0 usb3: USB revision 2.0 #2 FreeBSD tuatara.fishballoon.org 6.1-SECURITY FreeBSD 6.1-SECURITY #0: Mon Aug 28 05:21:08 UTC 2006 root@builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386 ehci0: <VIA VT6202 USB 2.0 controller> mem 0xda008000-0xda0080ff irq 10 at device 17.2 on pci0 ehci0: [GIANT-LOCKED] usb4: EHCI version 0.95 usb4: companion controllers, 2 ports each: usb2 usb3 usb4: <VIA VT6202 USB 2.0 controller> on ehci0 usb4: USB revision 2.0 #3 (Booted from a 6.1-R fixit CD - can't be bothered to type out the uname :-) ehci0: <NEC uPD 720100 USB 2.0 controller> usb2: EHCI version 0.95 usb2: companion controllers, 3 ports each: usb0 usb1 usb2: <NEC uPD 720100 USB 2.0 controller> usb2: USB revision 2.0 I tried these umass devices (all claim to be USB2.0): Vosonic VP6230 disk/card reader combo: da5: < VP6230 1.09> Fixed Direct Access SCSI-0 device Nikon D50 digital camera: da2: <NIKON D50 1.00> Removable Direct Access SCSI-2 device Seagate enclosure with 300GB disk: da0: <ST330063 1A 3.04> Fixed Direct Access SCSI-0 device Kingston 2GB flash drive: da1: <Kingston DataTraveler 2.0 1.00> Removable Direct Access SCSI-2 device Apple iPod: da0: <Apple iPod 1.53> Removable Direct Access SCSI-0 device Tested by reading a reasonable amount of data (500MB) from the raw device and also by writing then reading back a 500MB file from the mounted FAT filesystem, re-mounting it between the writing and reading steps. The 300GB drive was apparently too big for mount_msdosfs to handle so I only did the raw test there. All the reading/writing was done with dd using a 1MB block size. On machine #1 (VIA VT6202, EHCI 1.0) everything attached to ehci0 fine, but would hang for several minutes with a lot of this on the console: Nov 22 00:52:41 llama kernel: umass0: BBB reset failed, TIMEOUT Nov 22 00:53:46 llama kernel: umass0: BBB bulk-in clear stall failed, TIMEOUT Nov 22 00:54:51 llama kernel: umass0: BBB bulk-out clear stall failed, TIMEOUT I got this with the raw and file transfer, sometimes immediately, sometimes after transferring up to a couple of hundred MB. On machine #2 (VIA VT6202, EHCI 0.95) everything attached to ehci0 except for the VP6230 which insisted on attaching as a USB1.1 device instead (it does this under Windows on the same machine too). Apart from that all the tests were successful, no hangs or other weirdness. On machine #3 (NEC uPD 720100, EHCI 0.95) everything attached to ehci0 and all the tests were completely successful. I'm not sure what any of that proves except that VIA EHCI controllers clearly have some issues that aren't restricted to FreeBSD MS-DOS filesystem driver. I'm open to suggestions for any additional debugging, although not much is possible on machine #1 as it's my firewall/router :( Cheers, Scott -- =========================================================================== Scott Mitchell | PGP Key ID | "Eagles may soar, but weasels Cambridge, England | 0x54B171B9 | don't get sucked into jet engines" scott at fishballoon.org | 0xAA775B8B | -- Anon
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