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[195.250.132.146]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e6db1742asm64148915e9.31.2026.05.11.06.10.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2026 06:10:01 -0700 (PDT) Date: Mon, 11 May 2026 15:09:59 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: Wandun Cc: Tejun Heo , longman@redhat.com, chenridong@huaweicloud.com, hannes@cmpxchg.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] cgroup/cpuset: skip hardwall ancestor scan in v2 mode in cpuset_current_node_allowed() Message-ID: References: <20260508062940.4094652-1-chenwandun@lixiang.com> <202d0aa0f8da75986a895ffbd564b78d@kernel.org> <92eebc24-9612-4ea3-9bd3-da4d437b4d81@gmail.com> 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="us6xqj4hph2s6uaa" Content-Disposition: inline In-Reply-To: <92eebc24-9612-4ea3-9bd3-da4d437b4d81@gmail.com> --us6xqj4hph2s6uaa Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH] cgroup/cpuset: skip hardwall ancestor scan in v2 mode in cpuset_current_node_allowed() MIME-Version: 1.0 On Sat, May 09, 2026 at 05:36:39PM +0800, Wandun wr= ote: > > is_in_v2_mode() is also true for v1 mounted with cpuset_v2_mode, where > > cpuset.mem_exclusive / cpuset.mem_hardwall are still settable. Would > > that be a problem here? cpuset_v2() looks like a tighter fit. > You're right, it is a problem. >=20 > Under v1 + cpuset_v2_mode, CS_MEM_HARDWALL/CS_MEM_EXCLUSIVE can be set > on non-root cpuset cgroup, so can't directly return true; Ah, sorry missd that. > I will fix it in v2. Thx. --us6xqj4hph2s6uaa Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJEEABYKADkWIQRCE24Fn/AcRjnLivR+PQLnlNv4CAUCagHVIxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQfj0C55Tb+AjcVAD+Lisuh01JV5aKUXAdIKEB 5pnDtvIxOuzUkZUEryoJZ3wA/AhD7s5c46iQhZ6yAvx95t9JURrPVFn477mrvkBh 0UAE =AmYt -----END PGP SIGNATURE----- --us6xqj4hph2s6uaa--