From: Christoph Hellwig <hch@infradead.org>
To: "Thomas Hellström (VMware)" <thomas_os@shipmail.org>
Cc: Christoph Hellwig <hch@infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: dma api errors with swiotlb
Date: Wed, 4 Sep 2019 06:16:38 -0700 [thread overview]
Message-ID: <20190904131638.GA29164@infradead.org> (raw)
In-Reply-To: <a78c4100-4f93-d96d-60d1-d965a7769fca@shipmail.org>
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.
next prev parent reply other threads:[~2019-09-04 13:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 7:59 dma api errors with swiotlb Thomas Hellström (VMware)
2019-09-04 12:17 ` Christoph Hellwig
2019-09-04 12:54 ` Thomas Hellström (VMware)
2019-09-04 12:55 ` Christoph Hellwig
2019-09-04 13:02 ` Thomas Hellström (VMware)
2019-09-04 13:16 ` Christoph Hellwig [this message]
2019-09-04 13:21 ` Thomas Hellström (VMware)
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