From: Reinette Chatre <reinette.chatre@intel.com>
To: "Luck, Tony" <tony.luck@intel.com>,
"Moger, Babu" <bmoger@amd.com>,
"Aaron Tomlin" <atomlin@atomlin.com>,
"Dave.Martin@arm.com" <Dave.Martin@arm.com>,
"james.morse@arm.com" <james.morse@arm.com>,
"babu.moger@amd.com" <babu.moger@amd.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>
Cc: "sean@ashe.io" <sean@ashe.io>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 3/3] x86/resctrl: Add "*" shorthand to set minimum io_alloc CBM for all domains
Date: Thu, 18 Dec 2025 14:59:59 -0800 [thread overview]
Message-ID: <a76c2eee-2a64-42ab-b81c-90638321cd15@intel.com> (raw)
In-Reply-To: <SJ1PR11MB6083CCA2A7904E459B1AA35DFCA8A@SJ1PR11MB6083.namprd11.prod.outlook.com>
Hi Tony,
On 12/18/25 1:49 PM, Luck, Tony wrote:
>> + if (id && *id == '*') {
>
> That will accept arbitrary chars after the "*".
>
> if (id && !strcmp(id, "*"))
>
>> What do you think?
>
> Why is io_alloc special? The same simple change could apply to parse_line() to allow
> setting all domains in a resource to be set to the same value:
>
> # echo "L3:*=fff" > schemata
>
> # echo "MB:*=50" > schemata
If I remember correctly the idea was to limit this feature to io_alloc to avoid needing
to deal with L2 asymmetric domains [1].
Reinette
[1] https://lore.kernel.org/lkml/SJ1PR11MB60833A27A1B8057CDDFB1B2BFCCFA@SJ1PR11MB6083.namprd11.prod.outlook.com/
next prev parent reply other threads:[~2025-12-18 23:00 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-15 23:02 [PATCH v2 0/3] x86/resctrl: Add "*" shorthand to set minimum io_alloc CBM for all domains Aaron Tomlin
2025-12-15 23:02 ` [PATCH v2 1/3] fs/resctrl: Add helpers to check io_alloc support and enabled state Aaron Tomlin
2025-12-17 5:01 ` Reinette Chatre
2025-12-18 23:22 ` Aaron Tomlin
2025-12-19 17:05 ` Reinette Chatre
2025-12-25 22:23 ` Aaron Tomlin
2025-12-15 23:02 ` [PATCH v2 2/3] fs/resctrl: Return -EINVAL for a missing seq_show implementation Aaron Tomlin
2025-12-17 5:02 ` Reinette Chatre
2025-12-18 23:12 ` Aaron Tomlin
2025-12-15 23:02 ` [PATCH v2 3/3] x86/resctrl: Add "*" shorthand to set minimum io_alloc CBM for all domains Aaron Tomlin
2025-12-17 5:53 ` Reinette Chatre
2025-12-19 0:21 ` Aaron Tomlin
2025-12-18 21:32 ` Moger, Babu
2025-12-18 21:49 ` Luck, Tony
2025-12-18 21:56 ` Moger, Babu
2025-12-19 0:31 ` Aaron Tomlin
2025-12-19 0:40 ` Moger, Babu
2025-12-18 22:59 ` Reinette Chatre [this message]
2025-12-19 0:44 ` Aaron Tomlin
2025-12-19 18:28 ` Reinette Chatre
2025-12-19 20:42 ` Luck, Tony
2025-12-19 22:00 ` Reinette Chatre
2025-12-19 23:05 ` Luck, Tony
2025-12-25 22:50 ` Aaron Tomlin
2025-12-25 22:33 ` Aaron Tomlin
2025-12-19 0:26 ` Aaron Tomlin
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