linux-kernel - Re: [PATCH v2] x86/resctrl: Implement new mba

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Date: Mon, 22 Jan 2024 10:41:01 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: Borislav Petkov <bp@...en8.de>
CC: "Luck, Tony" <tony.luck@...el.com>, "Yu, Fenghua" <fenghua.yu@...el.com>,
	Peter Newman <peternewman@...gle.com>, "x86@...nel.org" <x86@...nel.org>,
	James Morse <james.morse@....com>, Jamie Iles <quic_jiles@...cinc.com>, "Babu
 Moger" <babu.moger@....com>, "Shen, Xiaochen" <xiaochen.shen@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: Re: [PATCH v2] x86/resctrl: Implement new mba_MBps throttling
 heuristic

Hi Boris,

On 1/22/2024 10:21 AM, Borislav Petkov wrote:
> On Mon, Jan 22, 2024 at 10:18:01AM -0800, Reinette Chatre wrote:
>> The fixes I have as pending are:
>>
>> [PATCH v2] x86/resctrl: Fix unused variable warning in cache_alloc_hsw_probe()
>> 	https://lore.kernel.org/lkml/ZULCd%2FTGJL9Dmncf@agluck-desk3/
>>
>> [PATCH v5 1/2] x86/resctrl: Remove hard-coded memory bandwidth limit
>> 	https://lore.kernel.org/lkml/c26a8ca79d399ed076cf8bf2e9fbc58048808289.1705359148.git.babu.moger@amd.com/
>>
>> [PATCH v5 2/2] x86/resctrl: Read supported bandwidth sources using CPUID command
>> 	https://lore.kernel.org/lkml/669896fa512c7451319fa5ca2fdb6f7e015b5635.1705359148.git.babu.moger@amd.com/
>>
>> [PATCH v3] x86/resctrl: Implement new mba_MBps throttling heuristic
>> 	https://lore.kernel.org/lkml/20240122180807.70518-1-tony.luck@intel.com/
> 
> Is that the order I should start queueing them in?

Thank you for noting this exchange. Yes, this order applies cleanly.
This is the list of pending resctrl fixes. There is also one
pending resctrl feature, the SNC work [1], that Tony plans to rebase
on these fixes.

As a side note: I did have a conversation with James about the
MPAM work and his expectation is that the SNC work goes first.

> If not, pls send me a note and I can start picking up stuff.

I was working on a separate note to you but we can continue discussing
the pending resctrl work here.

Reinette

[1] https://lore.kernel.org/lkml/20231204185357.120501-1-tony.luck@intel.com/