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Date: Tue, 10 Aug 2021 15:54:53 +0200 From: Sebastian Andrzej Siewior <bigeasy@...utronix.de> To: Valentin Schneider <valentin.schneider@....com> Cc: linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org, Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, Marc Zyngier <maz@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Mel Gorman <mgorman@...hsingularity.net> Subject: Re: [SPLAT 1/3] arm_pmu: Sleeping spinlocks down armpmu_alloc_atomic() 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? Sebastian
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