linux-kernel - Re: [RFC PATCH] mm/kfence: Introduce kernel parameter for selective usage of kfence.

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Message-ID: <08da326f-3fe4-3342-bce8-bbd94bf8be97@infradead.org>
Date:   Wed, 27 Jul 2022 17:00:12 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Imran Khan <imran.f.khan@...cle.com>, glider@...gle.com,
        elver@...gle.com, dvyukov@...gle.com, cl@...ux.com,
        penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org, vbabka@...e.cz,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com, corbet@....net
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org
Subject: Re: [RFC PATCH] mm/kfence: Introduce kernel parameter for selective
 usage of kfence.

Hi--

On 7/27/22 16:42, Imran Khan wrote:
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 98e5cb91faab..d66f555df7ba 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -5553,6 +5553,11 @@
>  			last alloc / free. For more information see
>  			Documentation/mm/slub.rst.
>  
> +	slub_kfence[=slabs][,slabs]]...]	[MM, SLUB]

I suppose that 'slabs' are by name?
How can the names be found?  via 'slabinfo -l' or 'ls /sys/kernel/slab/' ?


It seems to me that the boot option should be listed as s/slabs/slab/.
I.e., one uses 'comma' to list multiple slabs.
Or is there a way for multiple slabs to be entered without commas?

> +			Specifies the slabs for which kfence debug mechanism
> +			can be used. For more information about kfence see
> +			Documentation/dev-tools/kfence.rst.
> +

thanks.
-- 
~Randy