linux-kernel - Re: 3.10.9: kmemleak disables all CPUs except CPU0

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Message-ID: <CAHkRjk4g4-ig1zyX7qYO2byVhQQK0kZ4rgRCWU141hd-3c3==w@mail.gmail.com>
Date:	Mon, 2 Sep 2013 16:31:48 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Martin MOKREJŠ <mmokrejs@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 3.10.9: kmemleak disables all CPUs except CPU0

On 31 August 2013 14:35, Martin MOKREJŠ <mmokrejs@...il.com> wrote:
>   never realized that my CPUs are gone if I compile into kernel kmemleak.
> Is that really the aim?
>
> CONFIG_HAVE_DEBUG_KMEMLEAK=y
> CONFIG_DEBUG_KMEMLEAK=y
> CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=400
> # CONFIG_DEBUG_KMEMLEAK_TEST is not set
> # CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set
>
> 1.  Why isn't there /sys/devices/system/cpu/cpu0/online file?
> Does not matter if it contains 0 or 1. It just should exist.

I can't really see how kmemleak would do this, maybe other config
options that get set/cleared in the process of selecting kmemleak. Can
you do a diff between your config with /sys/... entries and the one
without?

-- 
Catalin
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