From: Christoph Hellwig <hch@lst.de>
To: Robin Murphy <robin.murphy@arm.com>
Cc: "Takashi Iwai" <tiwai@suse.de>, "Christoph Hellwig" <hch@lst.de>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
"Christian König" <christian.koenig@amd.com>,
"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>
Subject: Re: [PATCH] swiotlb: Fix unexpected swiotlb_alloc_coherent() failures
Date: Tue, 10 Apr 2018 20:10:20 +0200 [thread overview]
Message-ID: <20180410181020.GA28565@lst.de> (raw)
In-Reply-To: <40618b9c-786d-7f5f-3f5b-fc1dd8375846@arm.com>
On Tue, Apr 10, 2018 at 06:50:04PM +0100, Robin Murphy wrote:
> In the first one, the machine appears to have enough RAM that most of it is
> beyond the device's 36-bit DMA mask, thus it's fairly likely for the
> initial direct alloc to come back with something unsuitable.
But we should try a GFP_DMA32 allocation first, so this is a bit
surprising.
next prev parent reply other threads:[~2018-04-10 18:10 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-10 17:05 [PATCH] swiotlb: Fix unexpected swiotlb_alloc_coherent() failures Takashi Iwai
2018-04-10 17:06 ` Christoph Hellwig
2018-04-10 17:07 ` Takashi Iwai
2018-04-10 17:50 ` Robin Murphy
2018-04-10 18:10 ` Christoph Hellwig [this message]
2018-04-11 7:28 ` Takashi Iwai
2018-04-12 6:02 ` Christoph Hellwig
2018-04-12 8:03 ` Takashi Iwai
2018-04-12 8:19 ` Takashi Iwai
2018-04-12 8:27 ` Takashi Iwai
2018-04-12 10:32 ` Robin Murphy
2018-04-15 8:43 ` Takashi Iwai
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