Re: [PATCH v1 03/20] x86/resctrl: Add domain online callback for resctrl work

From: James Morse <james.morse@arm.com>
To: Reinette Chatre <reinette.chatre@intel.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org
Cc: Fenghua Yu <fenghua.yu@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	H Peter Anvin <hpa@zytor.com>, Babu Moger <Babu.Moger@amd.com>,
	shameerali.kolothum.thodi@huawei.com,
	Jamie Iles <jamie@nuviainc.com>,
	D Scott Phillips OS <scott@os.amperecomputing.com>,
	lcherian@marvell.com, bobo.shaobowang@huawei.com
Subject: Re: [PATCH v1 03/20] x86/resctrl: Add domain online callback for resctrl work
Date: Fri, 17 Sep 2021 17:57:58 +0100	[thread overview]
Message-ID: <9e008971-f26f-e0c5-4745-a5f4e019aea7@arm.com> (raw)
In-Reply-To: <fc092644-0f5d-b0d1-d14d-765bd42b9cf8@intel.com>

Hi Reinette,

On 01/09/2021 22:19, Reinette Chatre wrote:
> On 7/29/2021 3:35 PM, James Morse wrote:
>> +int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d)
>> +{

>> +
>> +    if (is_mbm_enabled()) {
>> +        INIT_DELAYED_WORK(&d->mbm_over, mbm_handle_overflow);
>> +        mbm_setup_overflow_handler(d, MBM_OVERFLOW_INTERVAL);
>> +    }
>> +
>> +    if (is_llc_occupancy_enabled())
>> +        INIT_DELAYED_WORK(&d->cqm_limbo, cqm_handle_limbo);
>> +
> 
> You also seem to address an issue where this work was not properly cleaned up on the error
> paths of the replaced domain_setup_mon_state(). Thank you.

Oops ... if I'd thought of it like that I'd have sent it as a fix!
(huh, it'll need a backport too, bother)

>> +    /* If resctrl is mounted, add per domain monitor data directories. */
>> +    if (static_branch_unlikely(&rdt_enable_key))
> 
> Should this be rdt_mon_enable_key instead?

Yup, fixed.

Thanks,

James