linux-kernel - Re: [PATCH v17 13/32] x86,fs/resctrl: Add an architectural hook called for each mount

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Message-ID: <20260105200435.GCaVwZU2gFV3LhJnMR@fat_crate.local>
Date: Mon, 5 Jan 2026 21:04:35 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: Fenghua Yu <fenghuay@...dia.com>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
	Peter Newman <peternewman@...gle.com>,
	James Morse <james.morse@....com>, Babu Moger <babu.moger@....com>,
	Drew Fustini <dfustini@...libre.com>,
	Dave Martin <Dave.Martin@....com>, Chen Yu <yu.c.chen@...el.com>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev
Subject: Re: [PATCH v17 13/32] x86,fs/resctrl: Add an architectural hook
 called for each mount

On Mon, Jan 05, 2026 at 11:39:29AM -0800, Luck, Tony wrote:
> Learn something new every day. Yes, <linux/once.h> looks possible here.
> 
> Though I believe I'll need the DO_ONCE_SLEEPABLE() version since 
> resctrl_arch_pre_mount() grabs a mutex and various called functions
> allocate memory using kmalloc().

Aha.

Ok, if it works and passes testing, I could wait for you to send me an updated
patch and drop this one.

Thx.

-- 
Regards/Gruss,
    Boris.

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