From: Miquel Raynal <miquel.raynal@bootlin.com>
To: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Cc: Rob Herring <robh@kernel.org>, Tony Luck <tony.luck@intel.com>,
Kees Cook <keescook@chromium.org>,
Jonathan Corbet <corbet@lwn.net>,
Richard Weinberger <richard@nod.at>,
Anton Vorontsov <anton@enomsg.org>,
linux-doc@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Colin Cross <ccross@android.com>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Vignesh Raghavendra <vigneshr@ti.com>
Subject: Re: [PATCH v2 11/11] mtd: new support oops logger based on pstore/blk
Date: Tue, 18 Feb 2020 11:34:49 +0100 [thread overview]
Message-ID: <20200218113449.5ac44955@xps13> (raw)
In-Reply-To: <1581078355-19647-12-git-send-email-liaoweixiong@allwinnertech.com>
Hi WeiXiong,
WeiXiong Liao <liaoweixiong@allwinnertech.com> wrote on Fri, 7 Feb
2020 20:25:55 +0800:
> It's the last one of a series of patches for adaptive to MTD device.
>
> The mtdpstore is similar to mtdoops but more powerful. It bases on
> pstore/blk, aims to store panic and oops logs to a flash partition,
> where it can be read back as files after mounting pstore filesystem.
>
> The pstore/blk and blkoops, a wrapper for pstore/blk, are designed for
> block device at the very beginning, but now, compatible to not only
> block device. After this series of patches, pstore/blk can also work
> for MTD device. To make it work, 'blkdev' on kconfig or module
> parameter of blkoops should be set as mtd device name or mtd number.
> See more about pstore/blk and blkoops on:
> Documentation/admin-guide/pstore-block.rst
>
> Why do we need mtdpstore?
> 1. repetitive jobs between pstore and mtdoops
> Both of pstore and mtdoops do the same jobs that store panic/oops log.
> They have much similar logic that register to kmsg dumper and store
> log to several chunks one by one.
> 2. do what a driver should do
> To me, a driver should provide methods instead of policies. What MTD
> should do is to provide read/write/erase operations, geting rid of codes
> about chunk management, kmsg dumper and configuration.
> 3. enhanced feature
> Not only store log, but also show it as files.
> Not only log, but also trigger time and trigger count.
> Not only panic/oops log, but also log recorder for pmsg, console and
> ftrace in the future.
>
> Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Richard, your PoV on this is welcome.
I suppose this patch depends on the others to work correctly so maybe
we should wait the next release before applying it.
Thanks,
Miquèl
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next prev parent reply other threads:[~2020-02-18 10:35 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-07 12:25 [PATCH v2 00/11] pstore: mtd: support crash log to block and mtd device WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 01/11] pstore/blk: new support logger for block devices WeiXiong Liao
2020-02-26 0:52 ` Kees Cook
2020-02-27 8:21 ` liaoweixiong
2020-03-18 17:23 ` Kees Cook
2020-03-20 1:50 ` WeiXiong Liao
2020-03-20 18:20 ` Kees Cook
2020-03-22 10:28 ` WeiXiong Liao
2020-03-09 0:52 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 02/11] blkoops: add blkoops, a warpper for pstore/blk WeiXiong Liao
2020-03-18 18:06 ` Kees Cook
2020-03-22 10:00 ` WeiXiong Liao
2020-03-22 15:44 ` Kees Cook
2020-02-07 12:25 ` [PATCH v2 03/11] pstore/blk: blkoops: support pmsg recorder WeiXiong Liao
2020-03-18 18:13 ` Kees Cook
2020-03-22 11:14 ` WeiXiong Liao
2020-03-22 15:59 ` Kees Cook
2020-02-07 12:25 ` [PATCH v2 04/11] pstore/blk: blkoops: support console recorder WeiXiong Liao
2020-03-18 18:16 ` Kees Cook
2020-03-22 11:35 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 05/11] pstore/blk: blkoops: support ftrace recorder WeiXiong Liao
2020-03-18 18:19 ` Kees Cook
2020-03-22 11:42 ` WeiXiong Liao
2020-03-22 15:16 ` Kees Cook
2020-02-07 12:25 ` [PATCH v2 06/11] Documentation: pstore/blk: blkoops: create document for pstore_blk WeiXiong Liao
2020-03-18 18:31 ` Kees Cook
2020-03-22 12:20 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 07/11] pstore/blk: skip broken zone for mtd device WeiXiong Liao
2020-03-18 18:35 ` Kees Cook
2020-03-22 12:27 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 08/11] blkoops: respect for device to pick recorders WeiXiong Liao
2020-03-18 18:42 ` Kees Cook
2020-03-22 13:06 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 09/11] pstore/blk: blkoops: support special removing jobs for dmesg WeiXiong Liao
2020-03-18 18:47 ` Kees Cook
2020-03-22 13:03 ` WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 10/11] blkoops: add interface for dirver to get information of blkoops WeiXiong Liao
2020-02-07 12:25 ` [PATCH v2 11/11] mtd: new support oops logger based on pstore/blk WeiXiong Liao
2020-02-18 10:34 ` Miquel Raynal [this message]
2020-02-19 1:13 ` liaoweixiong
2020-03-18 18:57 ` Kees Cook
2020-03-22 13:51 ` WeiXiong Liao
2020-03-22 15:13 ` Kees Cook
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