From: Joerg Roedel <jroedel@suse.de>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: iommu@lists.linux-foundation.org,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [Regression] "iommu/amd: Relax locking in dma_ops path" makes tg3 ethernet transmit queue timeout
Date: Fri, 21 Aug 2020 16:43:27 +0200 [thread overview]
Message-ID: <20200821144327.GN3354@suse.de> (raw)
In-Reply-To: <5D7A63DF-D360-4453-845C-924F4C13E3DB@canonical.com>
On Fri, Aug 21, 2020 at 09:50:33PM +0800, Kai-Heng Feng wrote:
> Of course, I still have the system at my side.
>
> The offending commit is 92d420ec028d ("iommu/amd: Relax locking in
> dma_ops path"), however be62dbf554c5 ("iommu/amd: Convert AMD iommu
> driver to the dma-iommu api") removed .map_page entirely so I don't
> know where to start.
I guess you don't see any AMD-Vi page-faults reported in dmesg, right?
That makes things more difficult. As a first step, can you please send
me a complete dmesg after this happened? Also please boot with
amd_iommu_dump on the kernel command line.
Regards,
Joerg
next prev parent reply other threads:[~2020-08-21 14:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 9:06 [Regression] "iommu/amd: Relax locking in dma_ops path" makes tg3 ethernet transmit queue timeout Kai-Heng Feng
2020-05-18 13:32 ` Joerg Roedel
2020-05-18 14:05 ` Kai-Heng Feng
2020-05-18 15:32 ` Kai-Heng Feng
2020-06-29 12:33 ` Kai-Heng Feng
2020-08-21 13:43 ` Joerg Roedel
2020-08-21 13:50 ` Kai-Heng Feng
2020-08-21 14:43 ` Joerg Roedel [this message]
2020-08-23 13:19 ` Kai-Heng Feng
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