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From: Christoph Hellwig <hch@lst.de>
To: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
	Gavin Li <git@thegavinli.com>,
	gavinli@thegavinli.com, Christoph Hellwig <hch@lst.de>,
	"list@263.net:IOMMU DRIVERS <iommu@lists.linux-foundation.org>,
	Joerg Roedel <joro@8bytes.org>,
	" <iommu@lists.linux-foundation.org>
Subject: Re: [PATCH v1] dma-mapping: normal memory for mmap() on coherent architectures
Date: Wed, 28 Oct 2020 18:31:52 +0100	[thread overview]
Message-ID: <20201028173152.GA10224@lst.de> (raw)
In-Reply-To: <CAFCwf122xMQJgqN9qJ1SXAHkVqg4GoNDC+NvXuj=-owXB=AO0A@mail.gmail.com>

On Wed, Oct 28, 2020 at 01:39:17PM +0200, Oded Gabbay wrote:
> On Sat, Aug 3, 2019 at 9:26 AM Christoph Hellwig <hch@lst.de> wrote:
> >
> > See the discussion at:
> >
> > https://lists.linuxfoundation.org/pipermail/iommu/2019-August/037716.html
> >
> > Just curious, what driver do you use that uses dma_mmap_coherent on
> > x86?
> > _______________________________________________
> > iommu mailing list
> > iommu@lists.linux-foundation.org
> > https://lists.linuxfoundation.org/mailman/listinfo/iommu
> 
> Hi Christoph,
> In the habanalabs driver we have moved to use dma_mmap_coherent (to
> match dma_alloc_coherent - see commit
> https://lkml.org/lkml/2020/8/29/252)
> Since then, we are plagued by the kernel log message that gavin has
> mentioned, as we are mostly running in our C/I environment with 5.4.
> I wondered if you know if there was any fix to that in the more recent kernels ?
> If not, can I help to fix that ?

What are the kernel log messages that gaving has mentioned?
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  reply	other threads:[~2020-10-28 17:32 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02 18:07 [PATCH v1] dma-mapping: normal memory for mmap() on coherent architectures gavinli
2019-08-03  6:23 ` Christoph Hellwig
2019-08-03  6:35   ` Gavin Li
2019-08-03  6:39     ` Christoph Hellwig
2020-10-28 11:39   ` Oded Gabbay
2020-10-28 17:31     ` Christoph Hellwig [this message]
2020-10-28 17:38       ` Oded Gabbay
2020-10-28 17:39         ` Christoph Hellwig
2020-10-28 19:33           ` Oded Gabbay

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