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

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Date: Mon, 22 Jan 2024 10:18:01 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: "Luck, Tony" <tony.luck@...el.com>, "Yu, Fenghua" <fenghua.yu@...el.com>,
	Peter Newman <peternewman@...gle.com>, "x86@...nel.org" <x86@...nel.org>
CC: 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 Tony,

On 1/22/2024 10:07 AM, Luck, Tony wrote:
>> I am sorry Tony, this reverse-fir breakage slipped through. I only noticed it after
>> trying to see how best to present all the pending work to x86 maintainers. Could
>> you please send a fixup with this addressed? After that I am planning to propose its
>> inclusion among all the other pending resctrl fixes followed by the SNC work. The SNC
>> work will need a rebase starting with this snippet, unless you see an easier way forward?
> 
> Reinette,
> 
> Thanks for catching this. I can send v3 of this patch right away (just fixing fir tree order only
> needs a compile test, not extensive regression tests).

Thank you very much Tony.

> 
> What are "all the other pending resctrl" fixes?  Since the SNC series is invasive to so many
> files & functions, I'll need to re-base SNC on top of everything else that's happening this
> cycle.

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/


Reinette