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Re: [PATCH v6 0/5] dma-mapping: Patches for speeding up allocation

Started byDoug Anderson <dianders@chromium.org>
First post2016-01-29 23:00 +0100
Last post2016-01-29 23:20 +0100
Articles 2 — 1 participant

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  Re: [PATCH v6 0/5] dma-mapping: Patches for speeding up allocation Doug Anderson <dianders@chromium.org> - 2016-01-29 23:00 +0100
    Re: [PATCH v6 0/5] dma-mapping: Patches for speeding up allocation Doug Anderson <dianders@chromium.org> - 2016-01-29 23:20 +0100

#1322120 — Re: [PATCH v6 0/5] dma-mapping: Patches for speeding up allocation

FromDoug Anderson <dianders@chromium.org>
Date2016-01-29 23:00 +0100
SubjectRe: [PATCH v6 0/5] dma-mapping: Patches for speeding up allocation
Message-ID<qWpfc-V4-3@gated-at.bofh.it>
Hi,

On Fri, Jan 29, 2016 at 1:52 PM, Olof Johansson <olof@lixom.net> wrote:
> On Tue, Jan 26, 2016 at 4:39 PM, Doug Anderson <dianders@chromium.org> wrote:
>> Hi,
>>
>> On Tue, Jan 26, 2016 at 3:59 PM, Andrew Morton
>> <akpm@linux-foundation.org> wrote:
>>> On Mon, 11 Jan 2016 09:30:22 -0800 Douglas Anderson <dianders@chromium.org> wrote:
>>>
>>>> This series of patches will speed up memory allocation in dma-mapping
>>>> quite a bit.
>>>
>>> This is pretty much all ARM and driver stuff so I think I'll duck it.
>>> But I can merge it if nobody else feels a need to.
>>
>> I was going to ask what the next steps were for this series.
>> Presumably I could post the patch to Russell's patch tracker if folks
>> want me to do that.  Alternatively it could go through the ARM-SOC
>> tree?
>>
>>
>>> I saw a few acked-by/tested-by/etc from the v5 posting which weren't
>>> carried over into v6 (might have been a timing race), so please fix
>>> that up if there's an opportunity.
>>
>> Right.  Both Robin and Tomasz gave their Reviewed-by to Patch #1 in v5
>> even after v6 was posted.
>>
>>
>>> Regarding the new DMA_ATTR_ALLOC_SINGLE_PAGES hint: I suggest adding
>>> "DMA_ATTR_ALLOC_SINGLE_PAGES is presently implemented only on ARM" to
>>> the docs.  Or perhaps have a shot at implementing it elsewhere.
>>
>> Warning sounds good.
>>
>>
>>> Typo in 4/5 changelog: "reqiurements"
>>
>> Thanks for catching!
>>
>>
>> I'm happy to post up a v6 with these things fixed or I'm happy for
>> whoever is applying it to make these small fixes themselves.  Any
>> volunteers?  Olof, Arnd, or Russell: any of you want these patches?
>
> I think it makes sense to send these through Russell's tracker for him
> to merge, especially since I don't think there are any dependencies on
> them for SoC-specific patches coming up.

Sounds good.  I'll make the nitfixes and I'll post a v7 directly to
Russell's tracker.  I'll follow up here with a link to those patches.

-Doug

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#1322126

FromDoug Anderson <dianders@chromium.org>
Date2016-01-29 23:20 +0100
Message-ID<qWpyy-1lv-5@gated-at.bofh.it>
In reply to#1322120
Hi,

On Fri, Jan 29, 2016 at 1:58 PM, Doug Anderson <dianders@chromium.org> wrote:
>> I think it makes sense to send these through Russell's tracker for him
>> to merge, especially since I don't think there are any dependencies on
>> them for SoC-specific patches coming up.
>
> Sounds good.  I'll make the nitfixes and I'll post a v7 directly to
> Russell's tracker.  I'll follow up here with a link to those patches.

For your viewing pleasure:

8505/1 dma-mapping: Optimize allocation
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8505/1

8506/1 common: DMA-mapping: add DMA_ATTR_ALLOC_SINGLE_PAGES attribute
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8506/1

8507/1 dma-mapping: Use DMA_ATTR_ALLOC_SINGLE_PAGES hint to optimize alloc
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8507/1

8508/1 videobuf2-dc: Let drivers specify DMA attrs
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8508/1

8509/1 s5p-mfc: Set DMA_ATTR_ALLOC_SINGLE_PAGES
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8509/1

---

Changes in v7 (AKA the above patches):
- Add Robin and Tomasz Reviewed-by.
- Add Javier Tested-by.
- Add note that this is only implemented on ARM (Andrew Morton).
- Typo in commit message "reqiurements" (Andrew Morton).


-Doug

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