From: Reinette Chatre <reinette.chatre@intel.com>
To: James Morse <james.morse@arm.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: Wed, 1 Sep 2021 14:19:45 -0700 [thread overview]
Message-ID: <fc092644-0f5d-b0d1-d14d-765bd42b9cf8@intel.com> (raw)
In-Reply-To: <20210729223610.29373-4-james.morse@arm.com>
Hi James,
On 7/29/2021 3:35 PM, James Morse wrote:
> Because domains are exposed to user-space via resctrl, the filesystem
> must update its state when cpu hotplug callbacks are triggered.
Could you please replace "cpu" with "CPU" throughout the series in
changelogs and comments?
>
> Some of this work is common to any architecture that would support
> resctrl, but the work is tied up with the architecture code to
> allocate the memory.
(I read the above as problem statement.)
>
> Move domain_setup_mon_state(), the monitor subdir creation call and the
> mbm/limbo workers into a new resctrl_online_domain() call.
(I read the above as what the code does.)
Could you please add description on what the patch does to address the
problem you describe?
...
> +}
> +
> +int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d)
> +{
> + int err;
> +
> + lockdep_assert_held(&rdtgroup_mutex); // the arch code took this for us
> +
Please do not use trailing comments.
> + if (!r->mon_capable)
> + return 0;
> +
> + err = domain_setup_mon_state(r, d);
> + if (err)
> + return err;
> +
> + 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.
> + /* 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?
Reinette
next prev parent reply other threads:[~2021-09-01 21:19 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 22:35 [PATCH v1 00/20] x86/resctrl: Make resctrl_arch_rmid_read() return values in bytes James Morse
2021-07-29 22:35 ` [PATCH v1 01/20] x86/resctrl: Kill off alloc_enabled James Morse
2021-08-11 12:12 ` Jamie Iles
2021-09-01 21:18 ` Reinette Chatre
2021-07-29 22:35 ` [PATCH v1 02/20] x86/resctrl: Merge mon_capable and mon_enabled James Morse
2021-08-11 12:15 ` Jamie Iles
2021-08-11 15:16 ` James Morse
2021-07-29 22:35 ` [PATCH v1 03/20] x86/resctrl: Add domain online callback for resctrl work James Morse
2021-09-01 21:19 ` Reinette Chatre [this message]
2021-09-17 16:57 ` James Morse
2021-07-29 22:35 ` [PATCH v1 04/20] x86/resctrl: Add domain offline " James Morse
2021-08-11 16:10 ` Jamie Iles
2021-09-01 21:21 ` Reinette Chatre
2021-07-29 22:35 ` [PATCH v1 05/20] x86/resctrl: Create mba_sc configuration in the rdt_domain James Morse
2021-08-11 16:32 ` Jamie Iles
2021-08-31 16:24 ` James Morse
2021-09-01 21:22 ` Reinette Chatre
2021-09-17 16:57 ` James Morse
2021-07-29 22:35 ` [PATCH v1 06/20] x86/resctrl: Switch over to the resctrl mbps_val list James Morse
2021-09-01 21:25 ` Reinette Chatre
2021-09-17 16:57 ` James Morse
2021-09-17 18:20 ` Reinette Chatre
2021-10-01 16:02 ` James Morse
2021-07-29 22:35 ` [PATCH v1 07/20] x86/resctrl: Remove architecture copy of mbps_val James Morse
2021-09-01 21:26 ` Reinette Chatre
2021-09-17 16:57 ` James Morse
2021-07-29 22:35 ` [PATCH v1 08/20] x86/resctrl: Remove set_mba_sc()s control array re-initialisation James Morse
2021-07-29 22:35 ` [PATCH v1 09/20] x86/resctrl: Abstract and use supports_mba_mbps() James Morse
2021-09-01 21:27 ` Reinette Chatre
2021-09-17 16:57 ` James Morse
2021-09-24 6:23 ` tan.shaopeng
2021-10-01 16:01 ` James Morse
2021-07-29 22:36 ` [PATCH v1 10/20] x86/resctrl: Allow update_mba_bw() to update controls directly James Morse
2021-09-01 21:28 ` Reinette Chatre
2021-07-29 22:36 ` [PATCH v1 11/20] x86/resctrl: Calculate bandwidth from the total bytes counter James Morse
2021-09-01 21:31 ` Reinette Chatre
2021-09-17 16:58 ` James Morse
2021-07-29 22:36 ` [PATCH v1 12/20] x86/recstrl: Add per-rmid arch private storage for overflow and chunks James Morse
2021-08-11 17:14 ` Jamie Iles
2021-08-31 16:25 ` James Morse
2021-07-29 22:36 ` [PATCH v1 13/20] x86/recstrl: Allow per-rmid arch private storage to be reset James Morse
2021-09-24 6:34 ` tan.shaopeng
2021-10-01 16:01 ` James Morse
2021-07-29 22:36 ` [PATCH v1 14/20] x86/resctrl: Abstract __rmid_read() James Morse
2021-07-29 22:36 ` [PATCH v1 15/20] x86/resctrl: Pass the required parameters into resctrl_arch_rmid_read() James Morse
2021-07-29 22:36 ` [PATCH v1 16/20] x86/resctrl: Move mbm_overflow_count() " James Morse
2021-07-29 22:36 ` [PATCH v1 17/20] x86/resctrl: Move get_corrected_mbm_count() " James Morse
2021-07-29 22:36 ` [PATCH v1 18/20] x86/resctrl: Rename and change the units of resctrl_cqm_threshold James Morse
2021-07-29 22:36 ` [PATCH v1 19/20] x86/resctrl: Add resctrl_rmid_realloc_limit to abstract x86's boot_cpu_data James Morse
2021-07-29 22:36 ` [PATCH v1 20/20] x86/resctrl: Make resctrl_arch_rmid_read() return values in bytes James Morse
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