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Message-ID: <ln2bt6n2yo4r5ip44pz7skhv2gvejm44zuie5kxidlwiavzjhs@mqphd5revvly>
Date: Tue, 24 Oct 2023 14:06:35 +0200
From: Maciej Wieczór-Retman
<maciej.wieczor-retman@...el.com>
To: James Morse <james.morse@....com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
"Thomas Gleixner" <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"Borislav Petkov" <bp@...en8.de>, H Peter Anvin <hpa@...or.com>,
Babu Moger <Babu.Moger@....com>,
<shameerali.kolothum.thodi@...wei.com>,
"D Scott Phillips OS" <scott@...amperecomputing.com>,
<carl@...amperecomputing.com>, <lcherian@...vell.com>,
<bobo.shaobowang@...wei.com>, <tan.shaopeng@...itsu.com>,
<xingxin.hx@...nanolis.org>, <baolin.wang@...ux.alibaba.com>,
Jamie Iles <quic_jiles@...cinc.com>,
Xin Hao <xhao@...ux.alibaba.com>, <peternewman@...gle.com>,
<dfustini@...libre.com>, <amitsinght@...vell.com>
Subject: Re: [PATCH v6 10/24] x86/resctrl: Allocate the cleanest CLOSID by
searching closid_num_dirty_rmid
On 2023-09-14 at 17:21:24 +0000, James Morse wrote:
>MPAM's PMG bits extend its PARTID space, meaning the same PMG value can be
>used for different control groups.
>
>This means once a CLOSID is allocated, all its monitoring ids may still be
>dirty, and held in limbo.
>
>Instead of allocating the first free CLOSID, on architectures where
>CONFIG_RESCTRL_RMID_DEPENDS_ON_COSID is enabled, search
"CONFIG_RESCTRL_RMID_DEPENDS_ON_COSID" >
"CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID"?
>closid_num_dirty_rmid[] to find the cleanest CLOSID.
>
>The CLOSID found is returned to closid_alloc() for the free list
>to be updated.
--
Kind regards
Maciej Wieczór-Retman
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