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From: Dave Airlie <>
To: "Koenig, Christian" <>
Cc: "Michel Dänzer" <>,
	"Ilia Mirkin" <>,
	"amd-gfx mailing list" <>,
	dri-devel <>,
	LKML <>
Subject: Re: [PATCH v2 1/2] drm/ttm: Only allocate huge pages with new flag TTM_PAGE_FLAG_TRANSHUGE
Date: Tue, 1 May 2018 09:15:19 +1000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

> 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.

For future reference I think how this should have gone down is

a) AMD implement a public CI with igt tests for all of this
b) we get these patches pushed and debugged.

Though to be a bit more constructive, I think you should have said at
-rc6 or 7 this isn't working for this kernel cycle,
push a minimal patch to back it off, even if the bug is in swiotlb, we
don't just add stuff broken like this, even if it's not
your bug we should have backed off for a kernel or two until we had
the underlying infrastructure fixed. Otherwise we
get what we have now, which is bit of a crappile, because now I've no
idea if the swiotlb things people report are
the false positive, or some new thing.


  reply	other threads:[~2018-04-30 23:15 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 [this message]
2018-05-01 13:59               ` Michel Dänzer

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