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From: Daniel Vetter <daniel@ffwll.ch>
To: Jerome Glisse <j.glisse@gmail.com>, Dave Airlie <airlied@gmail.com>
Cc: kyungmin.park@samsung.com, Jerome Glisse <jglisse@redhat.com>,
	dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] exynos: Put a stop to the userptr heresy.
Date: Tue, 8 Jul 2014 15:37:15 +0200	[thread overview]
Message-ID: <20140708133715.GD17271@phenom.ffwll.local> (raw)
In-Reply-To: <20140702152517.GA2507@gmail.com>

On Wed, Jul 02, 2014 at 11:25:19AM -0400, Jerome Glisse wrote:
> Anyway as this is upstream i guess you can keep it. This is just an horrible
> API that allow to circumvant any limit set by memcg for page locking and all.
> But anyway GPU driver never played in the same ballpark as other driver.

I agree that exynos userptr as-is should be removed since as opposed to
the i915 implementation it doesn't play nice with the core mm and allos
unpriviledged userspace to exceed all mlock limits.

I've taken considerable amounts of internal heat for rejecting i915
userptr until the mmu notifier stuff was implemented and so really want
exynos to fix this up asap.

Dave?

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

  reply	other threads:[~2014-07-08 13:37 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-30 21:46 [PATCH] exynos: Put a stop to the userptr heresy j.glisse
2014-07-01  8:55 ` Inki Dae
2014-07-01 15:03   ` Jerome Glisse
2014-07-02 15:09     ` Inki Dae
2014-07-02 15:25       ` Jerome Glisse
2014-07-08 13:37         ` Daniel Vetter [this message]
2014-07-08 16:20           ` Inki Dae
2014-07-09  9:23             ` Daniel Vetter
2014-07-09 15:39               ` Inki Dae
2014-07-10  7:11                 ` Daniel Vetter

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