linux-kernel - Re: [PATCH 1/2] perf/x86/rapl: Move the pmu allocation out of CPU hotplug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <875xq2tv05.ffs@tglx>
Date: Tue, 08 Oct 2024 18:33:14 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: kan.liang@...ux.intel.com, peterz@...radead.org, mingo@...hat.com,
 linux-kernel@...r.kernel.org
Cc: Kan Liang <kan.liang@...ux.intel.com>, Oliver Sang
 <oliver.sang@...el.com>, Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Subject: Re: [PATCH 1/2] perf/x86/rapl: Move the pmu allocation out of CPU
 hotplug

On Fri, Sep 13 2024 at 10:10, kan liang wrote:
> +static void __init init_rapl_pmu(void)
> +{
> +	struct rapl_pmu *pmu;
> +	s32 rapl_pmu_idx;
> +	int cpu;
> +
> +	cpus_read_lock();
> +
> +	for_each_cpu(cpu, cpu_online_mask) {

How is that supposed to work, when not all CPUs are online when
init_rapl_pmus() is invoked?

Thanks,

        tglx