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Thu, 20 Aug 2026 02:27:23 -0700 (PDT) Date: Thu, 20 Aug 2026 11:27:20 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: Hongfu Li Cc: hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, tj@kernel.org, shuah@kernel.org, akpm@linux-foundation.org, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Hongfu Li Subject: Re: [PATCH] selftests/cgroup: Fix cg_run_in_subcgroups ignoring arg parameter Message-ID: References: <20260820070944.31451-1-hongfu.li@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="5mgqyivtgswggrj3" Content-Disposition: inline In-Reply-To: <20260820070944.31451-1-hongfu.li@linux.dev> --5mgqyivtgswggrj3 Content-Type: text/plain; protected-headers=v1; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH] selftests/cgroup: Fix cg_run_in_subcgroups ignoring arg parameter MIME-Version: 1.0 On Thu, Aug 20, 2026 at 03:09:44PM +0800, Hongfu Li w= rote: > From: Hongfu Li >=20 > cg_run_in_subcgroups() discards its arg and always passes NULL to cg_run(= ), > turning the (void *)100 from test_kmem_dead_cgroups() into NULL so no > allocation occurs. >=20 > This makes test_kmem_dead_cgroups() falsely pass without exercising the > "dying cgroup with charged slab" scenario it intends to test. >=20 > Pass the arg through to cg_run() to fix this. >=20 > Fixes: 933dc80ec262 ("kselftests: cgroup: add kernel memory accounting te= sts") > Signed-off-by: Hongfu Li > --- > tools/testing/selftests/cgroup/test_kmem.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Good catch, Reviewed-by: Michal Koutn=FD --5mgqyivtgswggrj3 Content-Type: application/pgp-signature; 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