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List:       linux-usb
Subject:    Re: XHCI freezes, most up to date patches / tree ?
From:       Sander Eikelenboom <linux () eikelenboom ! it>
Date:       2010-09-30 20:28:08
Message-ID: 1053753326.20100930222808 () eikelenboom ! it
[Download RAW message or body]

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@eikelenboom.it]
> > Sent: Tuesday, September 14, 2010 4:01 PM
> > To: Xu, Andiry
> > Cc: Sarah Sharp; linux-usb@vger.kernel.org
> > 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@eikelenboom.it]
> > > > Sent: Monday, September 13, 2010 7:32 PM
> > > > To: Xu, Andiry
> > > > Cc: Sarah Sharp; linux-usb@vger.kernel.org
> > > > 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@eikelenboom.it
> > 





-- 
Best regards,
 Sander                            mailto:linux@eikelenboom.it

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