Messages in this thread | | | Subject | Re: [Regression] "iommu/amd: Relax locking in dma_ops path" makes tg3 ethernet transmit queue timeout | From | Kai-Heng Feng <> | Date | Mon, 18 May 2020 22:05:33 +0800 |
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> On May 18, 2020, at 21:32, Joerg Roedel <jroedel@suse.de> wrote: > > On Mon, May 18, 2020 at 05:06:45PM +0800, Kai-Heng Feng wrote: >> Particularly, as soon as the spinlock is removed, the issue can be reproduced. >> Function domain_flush_complete() doesn't seem to affect the status. >> >> However, the .map_page callback was removed by be62dbf554c5 >> ("iommu/amd: Convert AMD iommu driver to the dma-iommu api"), so >> there's no easy revert for this issue. >> >> This is still reproducible as of today's mainline kernel, v5.7-rc6. > > Is there any error message from the IOMMU driver? >
As of mainline kernel, there's no error message from IOMMU driver. There are some complains from v4.15-rc1: https://pastebin.ubuntu.com/p/qn4TXkFxsc/
Kai-Heng
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