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Message-ID: <7c6dcc06-0b6c-a346-c7ff-60da3fe59fbc@amd.com>
Date: Wed, 27 Sep 2023 16:34:00 -0500
From: "Moger, Babu" <bmoger@....com>
To: Reinette Chatre <reinette.chatre@...el.com>,
Babu Moger <babu.moger@....com>, corbet@....net,
tglx@...utronix.de, mingo@...hat.com, bp@...en8.de
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Subject: Re: [PATCH v10 09/10] x86/resctrl: Add support for the files for MON
groups only
Hi Reinette,
On 9/27/2023 1:34 PM, Reinette Chatre wrote:
> Hi Babu,
>
> On 9/15/2023 3:42 PM, Babu Moger wrote:
>> There are 3 types resctrl root files.
> Considering patch #4, should this be "base"?
Sure.
>
>> 1. RFTYPE_BASE : Files common for both MON and CTRL groups
>> 2. RFTYPE_BASE | RFTYPE_CTRL : Files only for CTRL groups
> If (1) is accurate then I cannot see how (2) can be accurate.
How about ?
2. RFTYPE_BASE | RFTYPE_CTRL : Files for the CTRL groups
>
>> 3. RFTYPE_BASE | RFTYPE_MON : Files only for MON groups
> Same here.
How bout?
3. RFTYPE_BASE | RFTYPE_MON : Files for the MON groups
>
>> Files only for the MON groups are not supported now. Add the
>> support to create these files.
> This is not accurate. Files "only for the MON groups" are
> actually the only monitor files that *are* supported. The
> problem being fixed here is that monitor files are
> not supported for CTRL_MON groups.
>
> I made an attempt at rewriting this commit message but I am
> doing it quite quickly so please do improve it:
>
> Files unique to monitoring groups have the
> RFTYPE_MON flag. When a new monitoring group is created
> the resctrl files with flags RFTYPE_BASE (files common
> to all resource groups) and RFTYPE_MON (files unique
> to monitoring groups) are created to support interacting with
> the new monitoring group.
>
> A resource group can support both monitoring and control,
> also termed a CTRL_MON resource group. CTRL_MON groups should
> get both monitoring and control resctrl files but that
> is not the case. Only the RFTYPE_BASE and RFTYPE_CTRL files
> are created for CTRL_MON groups. This is not a problem
> because there are no monitoring specific files with the
> RFTYPE_MON flag associated with resource groups.
>
> A later patch introduces the first RFTYPE_MON file for
> resource groups so fix resctrl file creation for CTRL_MON
> groups to ensure that monitoring files, those with the
> RFTYPE_MON flag, are also created.
Looks good with slight change(only last para. Rest looks good). Just
removed the "fix".
A later patch introduces the first RFTYPE_MON file for
resource groups. Add the changes to create the files for CTRL_MON
groups to ensure that monitoring files, those with the RFTYPE_MON flag,
are also created.
>
>> Signed-off-by: Babu Moger <babu.moger@....com>
>> ---
> I only have feedback about the changelog. The patch looks good to me.
Thanks
Babu
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