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From: "Christian König" <christian.koenig@amd.com>
To: Christoph Hellwig <hch@lst.de>, Gabriel C <nix.or.die@gmail.com>
Cc: "Tom Lendacky" <thomas.lendacky@amd.com>,
	"Jean-Marc Valin" <jmvalin@mozilla.com>,
	"Dave Airlie" <airlied@linux.ie>,
	"Felix Kuehling" <Felix.Kuehling@amd.com>,
	LKML <linux-kernel@vger.kernel.org>,
	dri-devel@lists.freedesktop.org,
	"Christian König" <christian.koenig@amd.com>,
	"Joerg Roedel" <jroedel@suse.de>,
	alexander.deucher@amd.com,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	"Michel Dänzer" <michel@daenzer.net>
Subject: Re: Kernel and ADM hardware roulette ( was AMD graphics performance regression in 4.15 and later )
Date: Fri, 8 Jun 2018 08:52:52 +0200	[thread overview]
Message-ID: <1c8b3938-6656-5d5a-f65d-dfd2e55d989e@amd.com> (raw)
In-Reply-To: <20180608060223.GB24107@lst.de>

Am 08.06.2018 um 08:02 schrieb Christoph Hellwig:
> On Thu, Jun 07, 2018 at 02:32:46PM +0200, Gabriel C wrote:
>> Ok done.. bisect points to:
> What is the failure mode you are seeing?  Can't find anything in the
> mail unfortunately.

As far as I analyzed it we now get an -ENOMEM from dma_alloc_attrs() in 
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c when IOMMU is enabled.

Still need to figure out which parameters we want to use for the 
allocation, but I think it is only 4k or 8k.

Regards,
Christian.

WARNING: multiple messages have this Message-ID (diff)
From: "Christian König" <christian.koenig@amd.com>
To: Christoph Hellwig <hch@lst.de>, Gabriel C <nix.or.die@gmail.com>
Cc: "Tom Lendacky" <thomas.lendacky@amd.com>,
	"Jean-Marc Valin" <jmvalin@mozilla.com>,
	"Dave Airlie" <airlied@linux.ie>,
	"Felix Kuehling" <Felix.Kuehling@amd.com>,
	LKML <linux-kernel@vger.kernel.org>,
	dri-devel@lists.freedesktop.org,
	"Michel Dänzer" <michel@daenzer.net>,
	"Joerg Roedel" <jroedel@suse.de>,
	alexander.deucher@amd.com,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>,
	"Christian König" <christian.koenig@amd.com>
Subject: Re: Kernel and ADM hardware roulette ( was AMD graphics performance regression in 4.15 and later )
Date: Fri, 8 Jun 2018 08:52:52 +0200	[thread overview]
Message-ID: <1c8b3938-6656-5d5a-f65d-dfd2e55d989e@amd.com> (raw)
In-Reply-To: <20180608060223.GB24107@lst.de>

Am 08.06.2018 um 08:02 schrieb Christoph Hellwig:
> On Thu, Jun 07, 2018 at 02:32:46PM +0200, Gabriel C wrote:
>> Ok done.. bisect points to:
> What is the failure mode you are seeing?  Can't find anything in the
> mail unfortunately.

As far as I analyzed it we now get an -ENOMEM from dma_alloc_attrs() in 
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c when IOMMU is enabled.

Still need to figure out which parameters we want to use for the 
allocation, but I think it is only 4k or 8k.

Regards,
Christian.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

  reply	other threads:[~2018-06-08  6:53 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-06 13:33 Kernel and ADM hardware roulette ( was AMD graphics performance regression in 4.15 and later ) Gabriel C
2018-06-06 14:12 ` Michel Dänzer
2018-06-06 14:12   ` Michel Dänzer
2018-06-06 14:44   ` Christian König
2018-06-06 14:44     ` Christian König
2018-06-06 15:03     ` Michel Dänzer
2018-06-06 15:03       ` Michel Dänzer
2018-06-06 15:44       ` Gabriel C
2018-06-07  7:07         ` Christian König
2018-06-07 12:32           ` Gabriel C
2018-06-07 16:24             ` Gabriel C
2018-06-07 17:20               ` Christian König
2018-06-08  6:01                 ` Christoph Hellwig
2018-06-08  6:47                   ` Christian König
2018-06-08  6:02             ` Christoph Hellwig
2018-06-08  6:02               ` Christoph Hellwig
2018-06-08  6:52               ` Christian König [this message]
2018-06-08  6:52                 ` Christian König
2018-06-08 13:32                 ` Gabriel C
2018-06-11  7:15                   ` Christoph Hellwig
2018-06-11 19:23                     ` Linus Torvalds
2018-06-11 19:23                       ` Linus Torvalds
2018-06-06 15:24     ` Gabriel C
2018-06-06 14:29 ` Christian König
2018-06-06 14:29   ` Christian König

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