From nobody Mon Feb 9 19:05:34 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 75F3437416D; Tue, 3 Feb 2026 21:45:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770155123; cv=none; b=WbeH+8JeVPfMJuCTCMNY9NZkYvLR6+4SEXAvTB7mdJT/h4Af7N3WqZalvbN6v72dMuIumdTpc+28rLMJAyfjq8qAv4U9fkMDJRBvkfRCypRpUzEAKvrXjGU5kkfD9Pa/pr5yo9254+DjTWBsETOBd5EtzeBr3U0edH9d6bTXNM8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770155123; c=relaxed/simple; bh=4Yk01KWSnNOo2sWrqodR58bKoWkmJ10ODL+nhGPYxCk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G8kDCCHeTN0zJSB8wCVO6TFGnIW3KO0EU1yAJ2nk+6hJbQT8S1/XANtZtlGgWFgx6LL+7Gv0lnjDT+F80GK4EVsfhVLNAkv0kEisr5NbnY2RnW7yVYLIX+zPg9AeKw2wo2s3d/301ehNwfJmRDp/o9s8l+i4p1JtIApbsamm1M4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7A7E8497; Tue, 3 Feb 2026 13:45:15 -0800 (PST) Received: from e134344.cambridge.arm.com (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 52E343F778; Tue, 3 Feb 2026 13:45:16 -0800 (PST) From: Ben Horgan To: ben.horgan@arm.com Cc: amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, carl@os.amperecomputing.com, dave.martin@arm.com, david@kernel.org, dfustini@baylibre.com, fenghuay@nvidia.com, gshan@redhat.com, james.morse@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, peternewman@google.com, punit.agrawal@oss.qualcomm.com, quic_jiles@quicinc.com, reinette.chatre@intel.com, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, tan.shaopeng@fujitsu.com, xhao@linux.alibaba.com, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, kvmarm@lists.linux.dev, zengheng4@huawei.com, linux-doc@vger.kernel.org, Shaopeng Tan Subject: [PATCH v4 14/41] arm_mpam: resctrl: Sort the order of the domain lists Date: Tue, 3 Feb 2026 21:43:15 +0000 Message-ID: <20260203214342.584712-15-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260203214342.584712-1-ben.horgan@arm.com> References: <20260203214342.584712-1-ben.horgan@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: James Morse resctrl documents that the domains appear in numeric order in the schemata file. This means a little more work is needed when bringing a domain online. Add the support for this, using resctrl_find_domain() to find the point to insert in the list. Tested-by: Gavin Shan Tested-by: Shaopeng Tan Tested-by: Peter Newman Reviewed-by: Jonathan Cameron Signed-off-by: James Morse Signed-off-by: Ben Horgan --- drivers/resctrl/mpam_resctrl.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index 4c2248c92955..90cdb5fdd3d6 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -127,6 +127,21 @@ static bool mpam_resctrl_offline_domain_hdr(unsigned i= nt cpu, return false; } =20 +static void mpam_resctrl_domain_insert(struct list_head *list, + struct rdt_domain_hdr *new) +{ + struct rdt_domain_hdr *err; + struct list_head *pos =3D NULL; + + lockdep_assert_held(&domain_list_lock); + + err =3D resctrl_find_domain(list, new->id, &pos); + if (WARN_ON_ONCE(err)) + return; + + list_add_tail_rcu(&new->list, pos); +} + static struct mpam_resctrl_dom * mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam_resctrl_res *res) { @@ -168,8 +183,7 @@ mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam= _resctrl_res *res) if (err) goto free_domain; =20 - /* TODO: this list should be sorted */ - list_add_tail_rcu(&ctrl_d->hdr.list, &r->ctrl_domains); + mpam_resctrl_domain_insert(&r->ctrl_domains, &ctrl_d->hdr); } else { pr_debug("Skipped control domain online - no controls\n"); } @@ -182,8 +196,7 @@ mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam= _resctrl_res *res) if (err) goto offline_ctrl_domain; =20 - /* TODO: this list should be sorted */ - list_add_tail_rcu(&mon_d->hdr.list, &r->mon_domains); + mpam_resctrl_domain_insert(&r->mon_domains, &mon_d->hdr); } else { pr_debug("Skipped monitor domain online - no monitors\n"); } --=20 2.43.0