Messages in this thread | | | Subject | Re: dma api errors with swiotlb | From | Thomas Hellström (VMware) <> | Date | Wed, 4 Sep 2019 15:21:55 +0200 |
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On 9/4/19 3:16 PM, Christoph Hellwig wrote: > On Wed, Sep 04, 2019 at 03:02:14PM +0200, Thomas Hellström (VMware) wrote: >> It looks like it does that, although when we send it, the SWIOTLB error has >> already occured and been printed out, and then the sequence starts again. > Well, the only way to really find out is to try. We also have a > backoff algorithm in the SCSI midlayer, so it should not be much of > an inpact. If you care about the warnings they can be disabled using > DMA_ATTR_NO_WARN. I have to admit that I'm not even sure the warnings > are all that useful, but that's something you need to take up with > the swiotlb maintainer.
Yes, I guess so. I actually think the warnings make sense, since while the scsi midlayer handles this nicely, other drivers competing for the space might not.
Thanks! Thomas
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