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Message-ID: <gvckzzomd7x3cxd7fxb37b6zn4uowjubpyrnvj7ptzz3mr3zq2@xovzgew63mxr>
Date: Mon, 7 Jul 2025 20:51:37 +0200
From: Alejandro Colomar <alx@...nel.org>
To: Marco Elver <elver@...gle.com>
Cc: linux-mm@...ck.org, linux-hardening@...r.kernel.org, 
	Kees Cook <kees@...nel.org>, Christopher Bazley <chris.bazley.wg14@...il.com>, 
	shadow <~hallyn/shadow@...ts.sr.ht>, linux-kernel@...r.kernel.org, 
	Andrew Morton <akpm@...ux-foundation.org>, kasan-dev@...glegroups.com, Dmitry Vyukov <dvyukov@...gle.com>, 
	Alexander Potapenko <glider@...gle.com>, Christoph Lameter <cl@...ux.com>, 
	David Rientjes <rientjes@...gle.com>, Vlastimil Babka <vbabka@...e.cz>, 
	Roman Gushchin <roman.gushchin@...ux.dev>, Harry Yoo <harry.yoo@...cle.com>, 
	Andrew Clayton <andrew@...ital-domain.net>, Sven Schnelle <svens@...ux.ibm.com>, 
	Heiko Carstens <hca@...ux.ibm.com>, Tvrtko Ursulin <tvrtko.ursulin@...lia.com>, 
	"Huang, Ying" <ying.huang@...el.com>, Lee Schermerhorn <lee.schermerhorn@...com>, 
	Linus Torvalds <torvalds@...ux-foundation.org>, Christophe JAILLET <christophe.jaillet@...adoo.fr>, 
	Hyeonggon Yoo <42.hyeyoo@...il.com>, Chao Yu <chao.yu@...o.com>
Subject: Re: [RFC v3 3/7] mm: Use seprintf() instead of less ergonomic APIs

Hi Marco,

On Mon, Jul 07, 2025 at 04:58:53PM +0200, Marco Elver wrote:
> Feel free to make it warning-free, I guess that's useful.

Thanks!

> > > Did you run the tests? Do they pass?
> >
> > I don't know how to run them.  I've only built the kernel.  If you point
> > me to instructions on how to run them, I'll do so.  Thanks!
> 
> Should just be CONFIG_KFENCE_KUNIT_TEST=y -- then boot kernel and
> check that the test reports "ok".

Hmmm, I can't see the results.  Did I miss anything?

	alx@...ian:~$ uname -a
	Linux debian 6.15.0-seprintf-mm+ #5 SMP PREEMPT_DYNAMIC Mon Jul  7 19:16:40 CEST 2025 x86_64 GNU/Linux
	alx@...ian:~$ cat /boot/config-6.15.0-seprintf-mm+ | grep KFENCE
	CONFIG_HAVE_ARCH_KFENCE=y
	CONFIG_KFENCE=y
	CONFIG_KFENCE_SAMPLE_INTERVAL=0
	CONFIG_KFENCE_NUM_OBJECTS=255
	# CONFIG_KFENCE_DEFERRABLE is not set
	# CONFIG_KFENCE_STATIC_KEYS is not set
	CONFIG_KFENCE_STRESS_TEST_FAULTS=0
	CONFIG_KFENCE_KUNIT_TEST=y
	alx@...ian:~$ sudo dmesg | grep -i kfence
	alx@...ian:~$ 

I see a lot of new stuff in dmesg, but nothing with 'kfence' in it.


Cheers,
Alex

-- 
<https://www.alejandro-colomar.es/>

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