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Date:   Tue, 10 Aug 2021 15:54:53 +0200
From:   Sebastian Andrzej Siewior <>
To:     Valentin Schneider <>
        Will Deacon <>,
        Mark Rutland <>,
        Marc Zyngier <>,
        Thomas Gleixner <>,
        Mel Gorman <>
Subject: Re: [SPLAT 1/3] arm_pmu: Sleeping spinlocks down

On 2021-08-10 14:41:25 [+0100], Valentin Schneider wrote:
> [    4.172817] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:35

Would it work to allocate the memory upfront and invoke the HP callback
via smp_function_call()? That is implemented via the hp-callback. It is
invoked after all CPUs are up. There is one "memory allocation" per
"node". This does not change during runtime, right?


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