linux-kernel - Re: [RFC PATCH 22/30] Code tagging based fault injection

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Message-ID: <b252a4e0-57a1-0f27-f4b0-598e851b47ea@infradead.org>
Date:   Tue, 30 Aug 2022 18:51:56 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
Cc:     kent.overstreet@...ux.dev, mhocko@...e.com, vbabka@...e.cz,
        hannes@...xchg.org, roman.gushchin@...ux.dev, mgorman@...e.de,
        dave@...olabs.net, willy@...radead.org, liam.howlett@...cle.com,
        void@...ifault.com, peterz@...radead.org, juri.lelli@...hat.com,
        ldufour@...ux.ibm.com, peterx@...hat.com, david@...hat.com,
        axboe@...nel.dk, mcgrof@...nel.org, masahiroy@...nel.org,
        nathan@...nel.org, changbin.du@...el.com, ytcoode@...il.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        vschneid@...hat.com, cl@...ux.com, penberg@...nel.org,
        iamjoonsoo.kim@....com, 42.hyeyoo@...il.com, glider@...gle.com,
        elver@...gle.com, dvyukov@...gle.com, shakeelb@...gle.com,
        songmuchun@...edance.com, arnd@...db.de, jbaron@...mai.com,
        rientjes@...gle.com, minchan@...gle.com, kaleshsingh@...gle.com,
        kernel-team@...roid.com, linux-mm@...ck.org, iommu@...ts.linux.dev,
        kasan-dev@...glegroups.com, io-uring@...r.kernel.org,
        linux-arch@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-bcache@...r.kernel.org, linux-modules@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 22/30] Code tagging based fault injection



On 8/30/22 14:49, Suren Baghdasaryan wrote:
> From: Kent Overstreet <kent.overstreet@...ux.dev>
> 
> This adds a new fault injection capability, based on code tagging.
> 
> To use, simply insert somewhere in your code
> 
>   dynamic_fault("fault_class_name")
> 
> and check whether it returns true - if so, inject the error.
> For example
> 
>   if (dynamic_fault("init"))
>       return -EINVAL;
> 
> There's no need to define faults elsewhere, as with
> include/linux/fault-injection.h. Faults show up in debugfs, under
> /sys/kernel/debug/dynamic_faults, and can be selected based on
> file/module/function/line number/class, and enabled permanently, or in
> oneshot mode, or with a specified frequency.
> 
> Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>

Missing Signed-off-by: from Suren.
See Documentation/process/submitting-patches.rst:

When to use Acked-by:, Cc:, and Co-developed-by:
------------------------------------------------

The Signed-off-by: tag indicates that the signer was involved in the
development of the patch, or that he/she was in the patch's delivery path.


-- 
~Randy