linux-kernel - Re: [PATCH v11 0/8] x86/resctrl: mba

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Message-ID: <20241209175739.GIZ1cvkycetfLpEsgE@fat_crate.local>
Date: Mon, 9 Dec 2024 18:57:39 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: "Chatre, Reinette" <reinette.chatre@...el.com>,
	"Yu, Fenghua" <fenghua.yu@...el.com>,
	Peter Newman <peternewman@...gle.com>,
	Jonathan Corbet <corbet@....net>, "x86@...nel.org" <x86@...nel.org>,
	James Morse <james.morse@....com>,
	Jamie Iles <quic_jiles@...cinc.com>,
	Babu Moger <babu.moger@....com>,
	Randy Dunlap <rdunlap@...radead.org>,
	"Shaopeng Tan (Fujitsu)" <tan.shaopeng@...itsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: Re: [PATCH v11 0/8] x86/resctrl: mba_MBps enhancement

On Mon, Dec 09, 2024 at 05:53:12PM +0000, Luck, Tony wrote:
> v6.13-rc1 may give a lockdep splat when mounting /sys/fs/resctrl
> (known CONFIG options to trigger this are:
> 
> 	PROVE_LOCKING && SELINUX && (EXT4 || BTRFS)
> 
> but there may be others).
> 
> These resctrl patches are not directly dependent on the fixes that
> went into -rc2:
> 
>    22465bbac53c blk-mq: move cpuhp callback registering out of q->sysfs_lock
>    4bf485a7db5d blk-mq: register cpuhp callback after hctx is added to xarray table
> 
> they work ok on top of -rc1  (as long as you ignore the lockdep splat).

Thanks for the details.

> I see you already have one patch in TIP x86/cache on top of v6.13-rc1
> 
> Your choice whether to rebase that to -rc2 and then apply my series. It
> might make testing smoother.

Yah, I can rebase. Not worth the hassle of dealing with bogus reports.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette