Hello Andiry, Could be it's not isoc specific, but i don't see it on ehci/ohci controllers i passthrough. And it could be somewhere in cleanup code paths that are not frequently hit. I will try to change some of the dbg output to warn's, perhaps that sheds a light on where the transfer error come from in the first place .. -- Sander Friday, October 1, 2010, 11:14:03 AM, you wrote: > Hi Sander, > That's interesting findings. I don't think the isoc patches do anything > differently above the 4Gb mem boundary. I'll try it on my side. > Thanks & Best regards, > Andiry > >> -----Original Message----- >> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx] >> Sent: Friday, October 01, 2010 4:28 AM >> To: Xu, Andiry >> Cc: Sarah Sharp; linux-usb@xxxxxxxxxxxxxxx >> Subject: Re: XHCI freezes, most up to date patches / tree ? >> >> Hi Andiry, >> >> It seems i have narrowed down my problem a bit. >> My system has 8Gb of ram, when i restrict the hypervisor to use only > 4G >> the system doesn't freeze. >> When using the full 8Gb it does (although the guests never get more > than >> 1G of mem) >> >> When i compare the logs of the 2 cases i get in the guest with the > xhci >> controller passed through to it: >> >> When restricting to 4G: >> Sep 28 17:55:02 security kernel: [81744.078288] xhci_hcd 0000:07:00.0: >> WARN: transfer error on endpoint >> Sep 28 17:55:02 security kernel: [81744.092653] xhci_hcd 0000:07:00.0: >> WARN: transfer error on endpoint >> Sep 28 17:55:02 security kernel: [81744.093647] xhci_hcd 0000:07:00.0: >> WARN: transfer error on endpoint >> Sep 28 17:55:02 security kernel: [81744.093647] xhci_hcd 0000:07:00.0: >> WARN: transfer error on endpoint >> Sep 28 17:55:02 security kernel: [81744.093647] xhci_hcd 0000:07:00.0: >> WARN: transfer error on endpoint >> >> Without restrictions, i don't get these before the system freezes. >> It's a hunch, but perhaps this could be related, because when it > freezes >> it hasn't got time to write the warning to the syslog and to disk. >> >> Is there anything in the cleanup of this warning related to dma/msi-x >> interrupts that could write or do something that could react > differently >> above the 4Gb mem boundary ? >> >> -- >> >> Sander >> >> >> Tuesday, September 14, 2010, 10:31:21 AM, you wrote: >> >> > Hi Sander, >> >> > Paul observed freeze issue, but in his last mail, his xHCI > controller >> > has been updated and the symptom is observed much less frequently. > And I >> > haven't seen his update log since then. >> >> > Thanks & Best regards, >> > Andiry >> > >> >> >> -----Original Message----- >> >> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx] >> >> Sent: Tuesday, September 14, 2010 4:01 PM >> >> To: Xu, Andiry >> >> Cc: Sarah Sharp; linux-usb@xxxxxxxxxxxxxxx >> >> Subject: Re: XHCI freezes, most up to date patches / tree ? >> >> >> >> Hi Andiry, >> >> >> >> Yes, since i was testing on baremetal instead of in a VM, i had to > use >> >> another program to do the videograbbing, it turned out I was trying > to >> > use >> >> the old v4l1 interface instead of v4l2. >> >> That should have worked, but resulted in an Oops, using v4l2 (as >> > intended) >> >> did work. >> >> >> >> During my vacation, I have had the grabber passed through to the VM >> > (on >> >> USB2) and it is running for +20 days now (24/7 grabbing), the > machine >> > had >> >> a lot of disk and network access as well. >> >> So the setup in essence could work, still having to find out what >> > exactly >> >> in passthrough in combination with XHCI makes it freeze completely >> > without >> >> any Oops or Trace. >> >> That's why I was interessted in the thread with Paul Zimmerman, >> > although i >> >> didn't see a conclusion. >> >> >> >> -- >> >> Sander >> >> >> >> >> >> Tuesday, September 14, 2010, 9:53:00 AM, you wrote: >> >> >> >> > Hi Sander, >> >> >> >> > As far as I know, there is no recent update patch for xhci isoc. >> >> >> >> > In your last mail you mentioned you also observed em28xx driver > on >> > USB2 >> >> > issue. Is that fixed? >> >> >> >> > Please apply the patch I sent to you last time when you catch the >> > freeze >> >> > symptom. >> >> >> >> > Thanks & Best regards, >> >> > Andiry >> >> > >> >> >> >> >> -----Original Message----- >> >> >> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx] >> >> >> Sent: Monday, September 13, 2010 7:32 PM >> >> >> To: Xu, Andiry >> >> >> Cc: Sarah Sharp; linux-usb@xxxxxxxxxxxxxxx >> >> >> Subject: XHCI freezes, most up to date patches / tree ? >> >> >> >> >> >> Hi Andiry, >> >> >> >> >> >> After my two week holiday, i would like to resume my quest in >> > finding >> >> > my >> >> >> problem where my USB3 passthrough on Xen seems to freeze my >> > complete >> >> >> system. >> >> >> It seems to be DMA related, although after consulting with the > guy >> > who >> >> >> works on the pci passthrough / swiotlb on Xen he couldn't find > Xen >> >> > related >> >> >> problems at first hand. >> >> >> >> >> >> Of special interest to me is the thread by "Paul Zimmerman" on > the >> >> > usb- >> >> >> devel mailing list. Also reporting a freeze. >> >> >> I didn't see any outcome of that discussion. >> >> >> >> >> >> Is there somewhere were i can get the most recent set of patches >> > for >> >> >> xhci/isoc, or is linus 2.6.36-rc4 tree up to date ? >> >> >> >> >> >> -- >> >> >> Sander >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> -- >> >> Best regards, >> >> Sander mailto:linux@xxxxxxxxxxxxxx >> >> >> >> >> >> >> >> -- >> Best regards, >> Sander mailto:linux@xxxxxxxxxxxxxx >> -- Best regards, Sander mailto:linux@xxxxxxxxxxxxxx -- 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
