From: Laura Abbott <labbott@redhat.com>
To: Brian Starkey <Brian.Starkey@arm.com>, "Andrew F. Davis" <afd@ti.com>
Cc: "Sumit Semwal" <sumit.semwal@linaro.org>,
"Liam Mark" <lmark@codeaurora.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Arve Hjønnevåg" <arve@android.com>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>, nd <nd@arm.com>,
"Daniel Vetter" <daniel@ffwll.ch>
Subject: Re: [PATCH 13/14] staging: android: ion: Do not sync CPU cache on map/unmap
Date: Tue, 19 Feb 2019 13:37:44 -0800 [thread overview]
Message-ID: <08057adf-d1da-7cb7-79ac-8e6e3934e7d7@redhat.com> (raw)
In-Reply-To: <20190124164447.3dwwampprzofwbyr@DESKTOP-E1NTVVP.localdomain>
On 1/24/19 8:44 AM, Brian Starkey wrote:
> On Thu, Jan 24, 2019 at 10:04:46AM -0600, Andrew F. Davis wrote:
>> On 1/23/19 11:11 AM, Brian Starkey wrote:
>
> [snip]
>
>>
>> I'm very new to all this, so any pointers to history in this area are
>> appreciated.
>>
>
> [snip]
>
>>
>>> In case you didn't come across it already, the effort which seems to
>>> have gained the most "air-time" recently is
>>> https://github.com/cubanismo/allocator, which is still a userspace
>>> module (perhaps some concepts from there could go into the kernel?),
>>> but makes some attempts at generic constraint solving. It's also not
>>> really moving anywhere at the moment.
>>>
>>
>> Very interesting, I'm going to have to stare at this for a bit.
>
> In which case, some reading material that might be of interest :-)
>
> https://www.x.org/wiki/Events/XDC2016/Program/Unix_Device_Memory_Allocation.pdf
> https://www.x.org/wiki/Events/XDC2017/jones_allocator.pdf
> https://lists.freedesktop.org/archives/mesa-dev/2017-November/177632.html
>
> -Brian
>
In some respects this is more a question of "what is the purpose
of Ion". Once upon a time, Ion was going to do constraint solving
but that never really happened and I figured Ion would get deprecated.
People keep coming out of the woodwork with new uses for Ion so
its stuck around. This is why I've primarily focused on Ion as a
framework for exposing available memory types to userspace and leave
the constraint solving to someone else, since that's what most
users seem to want out of Ion ("I know I want memory type X please
give it to me"). That's not to say that this was a perfect or
even the correct approach, just what made the most sense based
on users.
Thanks,
Laura
next prev parent reply other threads:[~2019-02-19 21:37 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-11 18:05 [PATCH 00/14] Misc ION cleanups and adding unmapped heap Andrew F. Davis
2019-01-11 18:05 ` [PATCH 01/14] staging: android: ion: Add proper header information Andrew F. Davis
2019-01-11 18:05 ` [PATCH 02/14] staging: android: ion: Remove empty ion_ioctl_dir() function Andrew F. Davis
2019-01-11 18:05 ` [PATCH 03/14] staging: android: ion: Merge ion-ioctl.c into ion.c Andrew F. Davis
2019-01-11 18:05 ` [PATCH 04/14] staging: android: ion: Remove leftover comment Andrew F. Davis
2019-01-11 18:05 ` [PATCH 05/14] staging: android: ion: Remove struct ion_platform_heap Andrew F. Davis
2019-01-11 18:05 ` [PATCH 06/14] staging: android: ion: Fixup some white-space issues Andrew F. Davis
2019-01-11 18:05 ` [PATCH 07/14] staging: android: ion: Sync comment docs with struct ion_buffer Andrew F. Davis
2019-01-11 18:05 ` [PATCH 08/14] staging: android: ion: Remove base from ion_carveout_heap Andrew F. Davis
2019-01-11 18:05 ` [PATCH 09/14] staging: android: ion: Remove base from ion_chunk_heap Andrew F. Davis
2019-01-11 18:05 ` [PATCH 10/14] staging: android: ion: Remove unused headers Andrew F. Davis
2019-01-11 18:05 ` [PATCH 11/14] staging: android: ion: Allow heap name to be null Andrew F. Davis
2019-01-16 15:28 ` Brian Starkey
2019-01-16 17:12 ` Andrew F. Davis
2019-01-18 19:53 ` Laura Abbott
2019-01-21 14:30 ` Andrew F. Davis
2019-01-11 18:05 ` [PATCH 12/14] staging: android: ion: Declare helpers for carveout and chunk heaps Andrew F. Davis
2019-01-18 9:59 ` Greg Kroah-Hartman
2019-01-18 16:09 ` Andrew F. Davis
2019-01-18 19:54 ` Laura Abbott
2019-01-11 18:05 ` [PATCH 13/14] staging: android: ion: Do not sync CPU cache on map/unmap Andrew F. Davis
2019-01-14 17:13 ` Liam Mark
2019-01-15 15:44 ` Andrew F. Davis
2019-01-15 17:45 ` Liam Mark
2019-01-15 18:38 ` Andrew F. Davis
2019-01-15 18:40 ` Andrew F. Davis
2019-01-16 15:19 ` Brian Starkey
2019-01-16 17:05 ` Andrew F. Davis
2019-01-16 22:54 ` Liam Mark
2019-01-17 16:25 ` Andrew F. Davis
2019-01-18 1:11 ` Liam Mark
2019-01-18 17:16 ` Andrew F. Davis
2019-01-21 11:22 ` Brian Starkey
2019-01-21 21:21 ` Andrew F. Davis
2019-01-22 17:33 ` Sumit Semwal
2019-01-23 16:51 ` Andrew F. Davis
2019-01-23 17:11 ` Brian Starkey
2019-01-24 16:04 ` Andrew F. Davis
2019-01-24 16:44 ` Brian Starkey
2019-02-19 21:37 ` Laura Abbott [this message]
[not found] ` <CAO_48GHZPkE8Or_dB6CVMi5Jv5eufE_Z36MT7ztJwTqTzkTpKA@mail.gmail.com>
2019-01-23 17:09 ` Andrew F. Davis
2019-01-22 22:56 ` Liam Mark
2019-01-21 20:11 ` Liam Mark
2019-01-15 19:05 ` Laura Abbott
2019-01-16 16:17 ` Andrew F. Davis
2019-01-16 22:48 ` Liam Mark
2019-01-17 16:13 ` Andrew F. Davis
2019-01-18 1:04 ` Liam Mark
2019-01-18 16:50 ` Andrew F. Davis
2019-01-18 21:43 ` Liam Mark
2019-01-21 15:15 ` Andrew F. Davis
2019-01-21 20:04 ` Liam Mark
2019-01-18 20:31 ` Laura Abbott
2019-01-18 20:43 ` Andrew F. Davis
2019-01-18 20:46 ` Laura Abbott
2019-01-19 10:11 ` Christoph Hellwig
2019-01-17 9:02 ` Christoph Hellwig
2019-01-11 18:05 ` [PATCH 14/14] staging: android: ion: Add UNMAPPED heap type and helper Andrew F. Davis
2019-01-15 2:32 ` Laura Abbott
2019-01-15 15:58 ` Andrew F. Davis
2019-01-15 18:43 ` Laura Abbott
2019-01-15 19:11 ` Laura Abbott
2019-01-16 16:18 ` Andrew F. Davis
2019-01-15 2:39 ` [PATCH 00/14] Misc ION cleanups and adding unmapped heap Laura Abbott
2019-01-15 17:47 ` Andrew F. Davis
2019-01-15 18:58 ` Laura Abbott
2019-01-16 16:05 ` Andrew F. Davis
2019-01-18 20:19 ` Laura Abbott
2019-01-21 14:58 ` Andrew F. Davis
2019-01-18 9:56 ` Greg Kroah-Hartman
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