From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Hans de Goede <hdegoede@redhat.com>, Christoph Hellwig <hch@lst.de>
Cc: Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb <linux-usb@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org
Subject: Re: 5.10 regression, many XHCI swiotlb buffer is full / DMAR: Device bounce map failed errors on thunderbolt connected XHCI controller
Date: Tue, 24 Nov 2020 14:17:19 +0200 [thread overview]
Message-ID: <868671fc-a4a4-9b38-b2f3-162f69f34493@linux.intel.com> (raw)
In-Reply-To: <f1bd62b4-a746-6b1c-08ee-6dd1982722b6@redhat.com>
On 24.11.2020 12.31, Hans de Goede wrote:
> Hi,
>
> On 11/24/20 11:27 AM, Christoph Hellwig wrote:
>> On Mon, Nov 23, 2020 at 03:49:09PM +0100, Hans de Goede wrote:
>>> Hi,
>>>
>>> +Cc Christoph Hellwig <hch@lst.de>
>>>
>>> Christoph, this is still an issue, so I've been looking around a bit and think this
>>> might have something to do with the dma-mapping-5.10 changes.
>>>
>>> Do you have any suggestions to debug this, or is it time to do a git bisect
>>> on this before 5.10 ships with regression?
>>
>> Given that DMAR prefix this seems to be about using intel-iommu + bounce
>> buffering for external devices. I can't really think of anything specific
>> in 5.10 related to that, so maybe you'll need to bisect.
>>
>> I doub this means we are actually leaking swiotlb buffers, so while
>> I'm pretty sure we broke something in lower layers this also means
>> xhci doesn't handle swiotlb operation very gracefully in general.
Can't think of any xhci change since 5.9 that would cause this.
It's possible there's some underlying xhci issue the 5.10 dma-mapping
changes reveal.
>
> Ok, I've re-arranged my schedule a bit so that I have time to bisect this
> tomorrow, so with some luck I will be able to provide info on which commit
> introduced this issue tomorrow around the end of the day.
Thanks for looking into it.
-Mathias
next prev parent reply other threads:[~2020-11-24 12:16 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 11:36 5.10 regression, many XHCI swiotlb buffer is full / DMAR: Device bounce map failed errors on thunderbolt connected XHCI controller Hans de Goede
2020-11-18 21:43 ` Hans de Goede
2020-11-23 14:49 ` Hans de Goede
2020-11-24 10:27 ` Christoph Hellwig
2020-11-24 10:31 ` Hans de Goede
2020-11-24 12:17 ` Mathias Nyman [this message]
2020-11-27 11:41 ` Hans de Goede
2020-11-27 12:32 ` 5.10 regression caused by: "uas: fix sdev->host->dma_dev": " Hans de Goede
2020-11-27 16:19 ` Christoph Hellwig
2020-11-27 18:12 ` Hans de Goede
2020-11-28 1:25 ` Tom Yan
2020-11-28 10:43 ` Hans de Goede
2020-11-28 15:48 ` [PATCH 1/2] uas: revert from scsi_add_host_with_dma() to scsi_add_host() Tom Yan
2020-11-28 15:48 ` [PATCH 2/2] usb-storage: " Tom Yan
2020-11-30 9:50 ` Hans de Goede
2020-11-30 12:58 ` Tom Yan
2020-11-30 13:23 ` Hans de Goede
2020-11-30 13:30 ` Greg KH
2020-11-30 13:36 ` Hans de Goede
2020-11-30 13:53 ` Greg KH
2020-11-30 13:55 ` Hans de Goede
2020-12-04 15:02 ` Greg KH
2020-11-30 17:20 ` Alan Stern
2020-11-30 17:24 ` Christoph Hellwig
2020-11-30 18:18 ` Hans de Goede
2020-11-30 18:57 ` Tom Yan
2020-11-30 19:01 ` Tom Yan
2020-11-30 20:36 ` Alan Stern
2021-02-25 16:35 ` Alan Stern
2021-02-26 5:53 ` Christoph Hellwig
2021-03-01 15:59 ` Alan Stern
2020-11-30 14:39 ` Tom Yan
2020-11-30 9:48 ` [PATCH 1/2] uas: " Hans de Goede
2020-11-30 19:30 ` Tom Yan
2020-12-01 11:09 ` Hans de Goede
2020-11-28 17:15 ` 5.10 regression caused by: "uas: fix sdev->host->dma_dev": many XHCI swiotlb buffer is full / DMAR: Device bounce map failed errors on thunderbolt connected XHCI controller Christoph Hellwig
2020-11-30 8:43 ` Hans de Goede
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