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From: "Michel Dänzer" <michel@daenzer.net>
To: Dave Airlie <airlied@gmail.com>,
	"Koenig, Christian" <christian.koenig@amd.com>
Cc: dri-devel <dri-devel@lists.freedesktop.org>,
	amd-gfx mailing list <amd-gfx@lists.freedesktop.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/2] drm/ttm: Only allocate huge pages with new flag TTM_PAGE_FLAG_TRANSHUGE
Date: Tue, 1 May 2018 15:59:06 +0200	[thread overview]
Message-ID: <023175f7-53a0-c85b-f4db-e7d3e3da8691@daenzer.net> (raw)
In-Reply-To: <CAPM=9tzmmT5G5a_2WCH5xpRr6rhY6sHdi-Kg5my0az_=haVZTw@mail.gmail.com>

On 2018-05-01 01:15 AM, Dave Airlie wrote:
>>
>>
>> Yes, I fixed the original false positive messages myself with the swiotlb
>> maintainer and I was CCed in fixing the recent fallout from Chris changes as
>> well.
> 
> So do we have a good summary of where this at now?
> 
> I'm getting reports on 4.16.4 still displaying these, what hammer do I
> need to hit things with to get 4.16.x+1 to not do this?
> 
> Is there still outstanding issues upstream.

There are, https://patchwork.freedesktop.org/patch/219765/ should
hopefully fix the last of it.


> [...] I've no idea if the swiotlb things people report are the false
> positive, or some new thing.

The issues I've seen reported with 4.16 are false positives from TTM's
perspective, which uses DMA_ATTR_NO_WARN to suppress these warnings, due
to multiple regressions introduced by commit
0176adb004065d6815a8e67946752df4cd947c5b "swiotlb: refactor
 coherent buffer allocation" in 4.16-rc1.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer

      reply	other threads:[~2018-05-01 13:59 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-26 15:06 [PATCH 1/2] drm/ttm: Add TTM_PAGE_FLAG_TRANSHUGE Michel Dänzer
2018-04-26 15:06 ` [PATCH 2/2] drm/ttm: Use GFP_TRANSHUGE_LIGHT for allocating huge pages Michel Dänzer
2018-04-29  7:04   ` Christian König
2018-04-27  2:51 ` [PATCH 1/2] drm/ttm: Add TTM_PAGE_FLAG_TRANSHUGE zhoucm1
2018-04-27  8:41   ` Michel Dänzer
2018-04-27 13:08 ` [PATCH v2 1/2] drm/ttm: Only allocate huge pages with new flag TTM_PAGE_FLAG_TRANSHUGE Michel Dänzer
2018-04-28 16:30   ` Ilia Mirkin
2018-04-28 23:02     ` Michel Dänzer
2018-04-28 23:56       ` Ilia Mirkin
2018-05-02  8:08         ` Michel Dänzer
2018-04-29  7:02       ` Christian König
2018-04-30 16:33         ` Michel Dänzer
2018-04-30 18:22           ` Christian König
2018-04-30 23:15             ` Dave Airlie
2018-05-01 13:59               ` Michel Dänzer [this message]

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