> On May 18, 2020, at 23:32, Kai-Heng Feng <[email protected]> wrote: > > > >> On May 18, 2020, at 22:05, Kai-Heng Feng <[email protected]> wrote: >> >> >> >>> On May 18, 2020, at 21:32, Joerg Roedel <[email protected]> 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/ > > Just tested v5.7-rc6, the issue disappears as soon as kernel boots with > "iommu=off".
I am still seeing the issue on v5.8-rc3. The issue goes away as soon as "iommu=off" is added. Kai-Heng > > Kai-Heng > >> >> Kai-Heng >
