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Date:   Tue, 18 Dec 2018 12:02:09 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     zhe.he@windriver.com
Cc:     acme@kernel.org, ak@linux.intel.com,
        alexander.shishkin@linux.intel.com, bp@alien8.de, hpa@zytor.com,
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        x86@kernel.org, linux-kernel@vger.kernel.org,
        linux-rt-users@vger.kernel.org
Subject: Re: [PATCH] perf/x86/intel: Avoid unnecessary reallocations of
 memory allocated in cpu hotplug prepare state
Message-ID: <20181218110209.GD15430@hirez.programming.kicks-ass.net>
References: <1545129033-21757-1-git-send-email-zhe.he@windriver.com>
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On Tue, Dec 18, 2018 at 06:30:33PM +0800, zhe.he@windriver.com wrote:
> Besides, in preempt-rt full mode, the freeing can happen in atomic context and
> thus cause the following BUG.

Hurm, I though we fixed all those long ago..

And no, the patch is horrible; that's what we have things like
x86_pmu::cpu_dead() for.