From: Corentin Labbe <clabbe.montjoie@gmail.com>
To: bskeggs@redhat.com, airlied@linux.ie, daniel@ffwll.ch,
hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com
Cc: nouveau@lists.freedesktop.org, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: DMA-API: cacheline tracking ENOMEM, dma-debug disabled due to nouveau ?
Date: Wed, 14 Aug 2019 16:50:33 +0200 [thread overview]
Message-ID: <20190814145033.GA11190@Red> (raw)
Hello
Since lot of release (at least since 4.19), I hit the following error message:
DMA-API: cacheline tracking ENOMEM, dma-debug disabled
After hitting that, I try to check who is creating so many DMA mapping and see:
cat /sys/kernel/debug/dma-api/dump | cut -d' ' -f2 | sort | uniq -c
6 ahci
257 e1000e
6 ehci-pci
5891 nouveau
24 uhci_hcd
Does nouveau having this high number of DMA mapping is normal ?
Regards
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next reply other threads:[~2019-08-14 15:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-14 14:50 Corentin Labbe [this message]
2019-08-14 17:49 ` DMA-API: cacheline tracking ENOMEM, dma-debug disabled due to nouveau ? Daniel Vetter
2019-08-15 13:35 ` Christoph Hellwig
2019-08-15 13:50 ` Robin Murphy
2019-08-16 14:31 ` Corentin Labbe
2019-08-16 18:45 ` Daniel Vetter
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