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Re: [PATCH v15 06/12] swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing

On Thu, Jun 24, 2021 at 11:55:20PM +0800, Claire Chang wrote:
> Propagate the swiotlb_force into io_tlb_default_mem->force_bounce and
> use it to determine whether to bounce the data or not. This will be
> useful later to allow for different pools.
> Signed-off-by: Claire Chang <tientzu@xxxxxxxxxxxx>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> Tested-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Tested-by: Will Deacon <will@xxxxxxxxxx>
> Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

This patch as commit af452ec1b1a3 ("swiotlb: Use is_swiotlb_force_bounce
for swiotlb data bouncing") causes my Ryzen 3 4300G system to fail to
get to an X session consistently (although not every single time),
presumably due to a crash in the AMDGPU driver that I see in dmesg.

I have attached logs at af452ec1b1a3 and f127c9556a8e and I am happy
to provide any further information, debug, or test patches as necessary.


Attachment: af452ec1b1a3.log
Description: Text document

Attachment: f127c9556a8e.log
Description: Text document



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