linux-kernel - Re: [PATCH v3 1/2] config: Adding the new config parameter CONFIG_PROVE_LOCKING

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Message-ID: <95f51c11-8b72-b7d3-03c4-942d42128a7a@oracle.com>
Date:   Wed, 5 Oct 2016 17:56:16 -0500
From:   Babu Moger <babu.moger@...cle.com>
To:     David Miller <davem@...emloft.net>
Cc:     peterz@...radead.org, mingo@...hat.com, akpm@...ux-foundation.org,
        keescook@...omium.org, dan.j.williams@...el.com,
        aryabinin@...tuozzo.com, tj@...nel.org, sam@...nborg.org,
        linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH v3 1/2] config: Adding the new config parameter
 CONFIG_PROVE_LOCKING_SMALL for sparc

Dave, Gentle reminder to review this patch. Thanks

On 9/30/2016 12:19 AM, David Miller wrote:
> From: Babu Moger <babu.moger@...cle.com>
> Date: Thu, 29 Sep 2016 08:53:24 -0500
>
>> On 9/28/2016 3:39 AM, Peter Zijlstra wrote:
>>> On Tue, Sep 27, 2016 at 12:33:27PM -0700, Babu Moger wrote:
>>>> This new config parameter limits the space used for "Lock debugging:
>>>> prove locking correctness" by about 4MB. The current sparc systems
>>>> have
>>>> the limitation of 32MB size for kernel size including .text, .data and
>>>> .bss sections. With PROVE_LOCKING feature, the kernel size could grow
>>>> beyond this limit and causing system boot-up issues. With this option,
>>>> kernel limits the size of the entries of lock_chains, stack_trace
>>>> etc.,
>>>> so that kernel fits in required size limit. This is not visible to
>>>> user
>>>> and only used for sparc.
>>>>
>>>> Signed-off-by: Babu Moger <babu.moger@...cle.com>
>>> You forgot to Cc Dave, and since you're touching sparc I need an Ack
>>> from him before I can queue this.
>> Dave, Can you please take a look at the patch. Please ack it if it
>> looks good.
> I am travelling and will look at it when I get a chance.