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

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Message-ID: <SJ1PR11MB60830483DCBE64EB726CF7E6FC742@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Tue, 23 Jan 2024 17:07:50 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: James Morse <james.morse@....com>, Borislav Petkov <bp@...en8.de>,
	"Chatre, Reinette" <reinette.chatre@...el.com>
CC: "Yu, Fenghua" <fenghua.yu@...el.com>, Peter Newman
	<peternewman@...gle.com>, "x86@...nel.org" <x86@...nel.org>, 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

>> I need to grab an SNC system to re-check that everything still works when re-based.
>> But right now, this looks like adding the SNC series will be easy (famous last words!).
>
> Once you're ready - can you point me at something I can use as a stable branch to rebase onto?

I'll be running the tests this afternoon. But I'm somewhat confident that they will pass.

Tree is here: git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux.git branch "hopeful_snc"

Commits are:

793635f10aeb x86/resctrl: Update documentation with Sub-NUMA cluster changes
dca7ba785d6f x86/resctrl: Sub NUMA Cluster detection and enable
e41bd88101c8 x86/resctrl: Introduce snc_nodes_per_l3_cache
ccbab7875197 x86/resctrl: Add node-scope to the options for feature scope
2f0db8c7072b x86/resctrl: Split the rdt_domain and rdt_hw_domain structures
22697627cc5f x86/resctrl: Prepare for different scope for control/monitor operations
f3ff831a9042 x86/resctrl: Prepare to split rdt_domain structure
c0679868ee78 x86/resctrl: Prepare for new domain scope
327b4394f309 x86/resctrl: Implement new mba_MBps throttling heuristic
5b14817cf87e x86/resctrl: Read supported bandwidth sources using CPUID command
5699cd082e1f x86/resctrl: Remove hard-coded memory bandwidth limit
1b908debf53f x86/resctrl: Fix unused variable warning in cache_alloc_hsw_probe()

Only the last of these (1b908debf53f) had been accepted by Boris into TIP x86/cache
when I cut this tree yesterday.

Two more applied by Boris today without any changes from what is in my tree, but the
commit IDs in TIP are obviously different from in my tree.

54e35eb8611c x86/resctrl: Read supported bandwidth sources from CPUID
0976783bb123 x86/resctrl: Remove hard-coded memory bandwidth limit

All the others have the normal risk that Boris will find some way to make them better.

-Tony