From: Hans de Goede <hdegoede@redhat.com>
To: 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 11:31:02 +0100 [thread overview]
Message-ID: <f1bd62b4-a746-6b1c-08ee-6dd1982722b6@redhat.com> (raw)
In-Reply-To: <20201124102715.GA16983@lst.de>
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.
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.
Regards,
Hans
next prev parent reply other threads:[~2020-11-24 10:31 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 [this message]
2020-11-24 12:17 ` Mathias Nyman
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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