linux-kernel - Re: [RFC v7 0/5] pstore/block: new support logger for block devices

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Message-ID: <5f243418-c6bd-061e-1161-1c0139ad84bf@allwinnertech.com>
Date:   Thu, 24 Jan 2019 20:16:30 +0800
From:   liaoweixiong <liaoweixiong@...winnertech.com>
To:     Aaro Koskinen <aaro.koskinen@....fi>
Cc:     Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Arnd Bergmann <arnd@...db.de>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [RFC v7 0/5] pstore/block: new support logger for block devices

On 2019-01-24 02:26, Aaro Koskinen wrote:
> Hi,
> 
> On Wed, Jan 23, 2019 at 08:05:11PM +0800, liaoweixiong wrote:
>> Why should we need pstore_block?
>> 1. Most embedded intelligent equipment have no persistent ram, which
>> increases costs. We perfer to cheaper solutions, like block devices.
>> In fast, there is already a sample for block device logger in driver
>> MTD (drivers/mtd/mtdoops.c).
> 
> I think you should add a patch for some actual block device using this
> new framework to show that it can work. What HW you think would be
> using things?
> 

I will try to add a patch. Actually, I have implemented it on allwinner
platform, but unfortunately these codes are unsuitable to submit to
upper stream.

In addition, there is already a sample for pstore/blk on patch 3 of
version 7. It names
blkoops. Blkoops is suitable for most block device as what it need is
just a path of a partition. We can use it to test most of features but
panic.

> A.
> 

-- 
liaoweixiong