linux-kernel - Re: [PATCH 1/1] percpu: fix early calls for spinlock in pcpu

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Message-ID: <20170621175439.GA10139@htj.duckdns.org>
Date:   Wed, 21 Jun 2017 13:54:39 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Dennis Zhou <dennisz@...com>
Cc:     "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>,
        Christoph Lameter <cl@...ux.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-team@...com" <kernel-team@...com>
Subject: Re: [PATCH 1/1] percpu: fix early calls for spinlock in pcpu_stats

On Wed, Jun 21, 2017 at 01:52:46PM -0400, Dennis Zhou wrote:
> From 2c06e795162cb306c9707ec51d3e1deadb37f573 Mon Sep 17 00:00:00 2001
> From: Dennis Zhou <dennisz@...com>
> Date: Wed, 21 Jun 2017 10:17:09 -0700
> 
> Commit 30a5b5367ef9 ("percpu: expose statistics about percpu memory via
> debugfs") introduces percpu memory statistics. pcpu_stats_chunk_alloc
> takes the spin lock and disables/enables irqs on creation of a chunk. Irqs
> are not enabled when the first chunk is initialized and thus kernels are
> failing to boot with kernel debugging enabled. Fixed by changing _irq to
> _irqsave and _irqrestore.
> 
> Fixes: 30a5b5367ef9 ("percpu: expose statistics about percpu memory via debugfs")
> Signed-off-by: Dennis Zhou <dennisz@...com>
> Reported-by: Alexander Levin <alexander.levin@...izon.com>

Applied to percpu/for-4.13.

Thanks.

-- 
tejun