linux-kernel - Re: [PATCH 0/5] ubi: Enhanced fault injection capability for the UBI driver

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Message-ID: <c6185f05-bbc6-355f-6061-73e81a8a0070@huawei.com>
Date:   Sun, 23 Apr 2023 20:54:27 +0800
From:   ZhaoLong Wang <wangzhaolong1@...wei.com>
To:     Richard Weinberger <richard@....at>
CC:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        chengzhihao1 <chengzhihao1@...wei.com>,
        yi zhang <yi.zhang@...wei.com>
Subject: Re: [PATCH 0/5] ubi: Enhanced fault injection capability for the UBI
 driver

Thank you very much for replying to my email. I agree with you.

I'll tweak my patch in the next few weeks, try to keep the old interface and
be compatible with the new interface.

Best Regards
ZhaoLong Wang

在 2023/4/22 5:18, Richard Weinberger 写道:
> ----- Ursprüngliche Mail -----
>> Von: "ZhaoLong Wang" <wangzhaolong1@...wei.com>
>> The existing fault injection capability of UBI is too simple.
>> It uses hard-coded fault probability values and lacks other
>> configurable options. As a result, these interfaces are difficult
>> to use when digging defects in the abnormal path of code and
>> reproducing some problems.
>>
>> The kernel provides a powerful fault injection framework, which
>> provides rich configurable fault injection attributes during runtime.
>> So it can be used to improve the fault injection capability of the
>> UBI driver.
>>
>> This series of patches refactor the existing fault injection interface
>> and add some fault injection types to help testers and developers
>> find potential problems in the code.
> In general I like having some new and advanced way to test UBI.
> But your patches seem to remove the old interface from debugfs,
> this will cause breakage of existing test scripts.
>
> So please keep the old interface too.
>
> Thanks,
> //richard
>