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

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Message-ID: <CANOoOjt=9PTa4u3x3C1kB+ApaREuPpm0CZ9Zf_eKM1EPFb-MZg@mail.gmail.com>
Date:   Tue, 7 Feb 2017 15:18:40 +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

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.