linux-kernel - Re: ARM imx.6 SATA speed regression

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Message-ID: <CANOoOjvE-jRd2JiEmNX_X==CiVX9Kfs8vRm7Cj3KSs4bTJAfhQ@mail.gmail.com>
Date:   Tue, 7 Feb 2017 17:02:40 +0000
From:   Dan MacDonald <allcoms@...il.com>
To:     Fabio Estevam <fabio.estevam@....com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Gary Bisson <gary.bisson@...ndarydevices.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "tj@...nel.org" <tj@...nel.org>,
        "festevam@...il.com" <festevam@...il.com>
Subject: Re: ARM imx.6 SATA speed regression

Thankfully there is an archive of older Arch ARM packages which should
reduce the amount amount of bisection / compiling I may need to do and
they have packages for most stable kernels between 4.9.0 and 4.9.8

http://tardis.tiny-vps.com/aarm/packages/l/linux-armv7/

On Tue, Feb 7, 2017 at 3:45 PM, Dan MacDonald <allcoms@...il.com> wrote:
> This is one of the cross-compilation guides I tried and failed to get to work.
>
> https://archlinuxarm.org/wiki/Distcc_Cross-Compiling
>
> It's been a year or two since I last tried to get distcc working. I
> followed all those instructions but packages would only ever compile
> locally. I can't remember what other guides I tried but that one was
> the most directly relevant and most likely to work as I use Arch on
> all my machines, x86 and ARM.
>
> On Tue, Feb 7, 2017 at 3:18 PM, Dan MacDonald <allcoms@...il.com> wrote:
>> Hi Fabio
>>
>> I've never used bisect before and I have thusfar failed to get ARM
>> cross-compilation to work so I'm a bit wary of having to spend several
>> days rebuilding Linux several times on my board.
>>
>> I think the first thing I need to do is to see what other archived
>> Arch kernel packages I can get - hopefully I can find packages for
>> 4.9.1, 4.9.2 etc. I would imagine that if I can find the stable
>> release post 4.9.0 where imx6 SATA speed took a nosedive, that will
>> make bisecting much faster.
>>
>> If anyone has an easy to follow, known working guide to setting up
>> cross-compilation from amd64 -> armv7h, that would be massively
>> helpful as none of the ones I have tried in the past have worked.
>>
>> Thanks
>>
>> On Tue, Feb 7, 2017 at 2:58 PM, Fabio Estevam <fabio.estevam@....com> wrote:
>>> [Sorry for the top-post]
>>>
>>>
>>> Hi Dan,
>>>
>>>
>>> Could you run 'git bisect' between kernel 4.9.0 and 4.9.8 to understand
>>> where this performance regression come from?
>>>
>>> ________________________________
>>> From: Dan MacDonald <allcoms@...il.com>
>>> Sent: Tuesday, February 7, 2017 12:31:10 PM
>>> To: linux-kernel@...r.kernel.org
>>> Cc: Gary Bisson; Fabio Estevam; shawnguo@...nel.org; tj@...nel.org
>>> Subject: Re: ARM imx.6 SATA speed regression
>>>
>>> (Fake) Reply to CC in relevant people.