linux-kernel - ODEBUG: Out of memory. ODEBUG disabled

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Date:   Fri, 9 Nov 2018 16:36:04 -0500
From:   Qian Cai <cai@....us>
To:     open list <linux-kernel@...r.kernel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        Waiman Long <longman@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Zhong Jiang <zhongjiang@...wei.com>
Subject: ODEBUG: Out of memory. ODEBUG disabled

It is a bit annoying on this aarch64 server with 64 CPUs that is
booting the latest mainline (3541833fd1f2) causes object debugging
always running out of memory.

I have to boot the kernel with only 16 CPUs instead (nr_cpus=16)
to make it work. Is it expected that object debugging is not going
to work with large machines?