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 -- 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
