linux-kernel - Re: 4.19.21: perf does not work on Ryzen, OK with 4.19.20

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Message-ID: <20190213130923.GR32494@hirez.programming.kicks-ass.net>
Date:   Wed, 13 Feb 2019 14:09:23 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sami Farin <hvtaifwkbgefbaei@...il.com>,
        Linux kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 4.19.21: perf does not work on Ryzen, OK with 4.19.20

On Wed, Feb 13, 2019 at 12:08:03PM +0100, Sami Farin wrote:
> The same .config, BIOS, and kernel boot parameters in both kernels.
> 
> # perf top -v
>            ┌─Error:────────────────────────────────────────┐
>            │Failed to mmap with 12 (Cannot allocate memory)│

I think you got bit by this one:

http://lkml.kernel.org/r/tip-528871b456026e6127d95b1b2bd8e3a003dc1614@git.kernel.org