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>,
shameerali.kolothum.thodi@huawei.com,
Jamie Iles <jamie@nuviainc.com>,
D Scott Phillips OS <scott@os.amperecomputing.com>
Subject: Re: [PATCH 06/24] x86/resctrl: Store the effective num_closid in the schema
Date: Tue, 17 Nov 2020 14:04:29 -0800 [thread overview]
Message-ID: <14fa276a-ce44-07f4-203e-d1c8f5967b0b@intel.com> (raw)
In-Reply-To: <20201030161120.227225-7-james.morse@arm.com>
Hi James,
On 10/30/2020 9:11 AM, James Morse wrote:
> resctrl_schema holds properties that vary with the style of configuration
> that resctrl applies to a resource.
>
> Once the arch code has a single resource per cache that can be configured,
> resctrl will need to keep track of the num_closid itself.
>
> Add num_closid to resctrl_schema. Change callers like
> rdtgroup_schemata_show() to walk the schema instead.
This is a significant patch in that it introduces a second num_closid
available for code to use. Even so, the commit message is treating it
quite nonchalantly ... essentially stating that "here is a new closid
and change some code to use it".
Could you please elaborate how the callers needing to "walk the schema
instead" were chosen?
This seems almost a revert of the earlier patch that introduced the
helper and I wonder if it may not make this easier to understand if
these areas do not receive the temporary change to use that helper.
>
> Signed-off-by: James Morse <james.morse@arm.com>
> ---
> arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 13 ++++++++-----
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 11 +++++------
> include/linux/resctrl.h | 2 ++
> 3 files changed, 15 insertions(+), 11 deletions(-)
>
...
> diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
> index de6cbc725753..b32152968bca 100644
> --- a/include/linux/resctrl.h
> +++ b/include/linux/resctrl.h
> @@ -166,10 +166,12 @@ struct rdt_resource {
> /**
> * @list: Member of resctrl's schema list
> * @res: The rdt_resource for this entry
> + * @num_closid Number of CLOSIDs available for this resource
Missing a ":"?
> */
> struct resctrl_schema {
> struct list_head list;
> struct rdt_resource *res;
> + u32 num_closid;
> };
>
> /* The number of closid supported by this resource regardless of CDP */
>
Reinette
next prev parent reply other threads:[~2020-11-17 22:04 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 16:10 [PATCH 00/24] x86/resctrl: Merge the CDP resources James Morse
2020-10-30 16:10 ` [PATCH 01/24] x86/resctrl: Split struct rdt_resource James Morse
2020-11-17 19:20 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:10 ` [PATCH 02/24] x86/resctrl: Split struct rdt_domain James Morse
2020-11-17 19:22 ` Reinette Chatre
2020-10-30 16:10 ` [PATCH 03/24] x86/resctrl: Add resctrl_arch_get_num_closid() James Morse
2020-11-17 19:57 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:11 ` [PATCH 04/24] x86/resctrl: Add a separate schema list for resctrl James Morse
2020-11-17 21:29 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:11 ` [PATCH 05/24] x86/resctrl: Pass the schema in resdir's private pointer James Morse
2020-11-17 21:49 ` Reinette Chatre
2021-03-12 17:11 ` James Morse
2020-10-30 16:11 ` [PATCH 06/24] x86/resctrl: Store the effective num_closid in the schema James Morse
2020-11-17 22:04 ` Reinette Chatre [this message]
2021-03-12 17:13 ` James Morse
2020-10-30 16:11 ` [PATCH 07/24] x86/resctrl: Label the resources with their configuration type James Morse
2020-11-17 22:30 ` Reinette Chatre
2021-03-12 17:36 ` James Morse
2020-10-30 16:11 ` [PATCH 08/24] x86/resctrl: Walk the resctrl schema list instead of an arch list James Morse
2020-11-17 22:52 ` Reinette Chatre
2021-03-12 17:37 ` James Morse
2020-10-30 16:11 ` [PATCH 09/24] x86/resctrl: Change rdt_resource to resctrl_schema in pseudo_lock_region James Morse
2020-10-30 16:11 ` [PATCH 10/24] x86/resctrl: Move the schema names into struct resctrl_schema James Morse
2020-11-10 11:39 ` Jamie Iles
2020-11-11 18:11 ` James Morse
2020-11-17 23:11 ` Reinette Chatre
2021-03-12 17:38 ` James Morse
2020-10-30 16:11 ` [PATCH 11/24] x86/resctrl: Group staged configuration into a separate struct James Morse
2020-11-17 23:28 ` Reinette Chatre
2021-03-12 17:41 ` James Morse
2020-10-30 16:11 ` [PATCH 12/24] x86/resctrl: Add closid to the staged config James Morse
2020-11-17 23:46 ` Reinette Chatre
2021-03-12 17:43 ` James Morse
2020-10-30 16:11 ` [PATCH 13/24] x86/resctrl: Allow different CODE/DATA configurations to be staged James Morse
2020-11-18 0:30 ` Reinette Chatre
2020-10-30 16:11 ` [PATCH 14/24] x86/resctrl: Make update_domains() learn the affected closids James Morse
2020-10-30 16:11 ` [PATCH 15/24] x86/resctrl: Add a helper to read a closid's configuration James Morse
2020-10-30 16:11 ` [PATCH 16/24] x86/resctrl: Add a helper to read/set the CDP configuration James Morse
2020-10-30 16:11 ` [PATCH 17/24] x86/resctrl: Use cdp_enabled in rdt_domain_reconfigure_cdp() James Morse
2020-10-30 16:11 ` [PATCH 18/24] x86/resctrl: Pass configuration type to resctrl_arch_get_config() James Morse
2020-10-30 16:11 ` [PATCH 19/24] x86/resctrl: Make ctrlval arrays the same size James Morse
2020-10-30 16:11 ` [PATCH 20/24] x86/resctrl: Apply offset correction when config is staged James Morse
2020-10-30 16:11 ` [PATCH 21/24] x86/resctrl: Calculate the index from the configuration type James Morse
2020-10-30 16:11 ` [PATCH 22/24] x86/resctrl: Merge the ctrlval arrays James Morse
2020-10-30 16:11 ` [PATCH 23/24] x86/resctrl: Remove rdt_cdp_peer_get() James Morse
2020-10-30 16:11 ` [PATCH 24/24] x86/resctrl: Merge the CDP resources James Morse
2020-11-13 15:38 ` [PATCH 00/24] " Jamie Iles
2020-11-16 17:54 ` Reinette Chatre
2020-11-17 13:05 ` James Morse
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