linux-kernel - Re: [PATCH v3 30/47] arm_mpam: resctrl: Pre-allocate free running monitors

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Message-ID: <20260113151025.00001911@huawei.com>
Date: Tue, 13 Jan 2026 15:10:25 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Ben Horgan <ben.horgan@....com>
CC: <amitsinght@...vell.com>, <baisheng.gao@...soc.com>,
	<baolin.wang@...ux.alibaba.com>, <carl@...amperecomputing.com>,
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	<fenghuay@...dia.com>, <gshan@...hat.com>, <james.morse@....com>,
	<kobak@...dia.com>, <lcherian@...vell.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
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Subject: Re: [PATCH v3 30/47] arm_mpam: resctrl: Pre-allocate free running
 monitors

On Mon, 12 Jan 2026 16:58:57 +0000
Ben Horgan <ben.horgan@....com> wrote:

> From: James Morse <james.morse@....com>
> 
> When there are enough monitors, the resctrl mbm local and total files can
> be exposed. These need all the monitors that resctrl may use to be
> allocated up front.
> 
> Add helpers to do this.
> 
> If a different candidate class is discovered, the old array should be
> free'd and the allocated monitors returned to the driver.
> 
> Signed-off-by: James Morse <james.morse@....com>
> Signed-off-by: Ben Horgan <ben.horgan@....com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>