linux-kernel - Re: [PATCH v11 05/10] x86/resctrl: Unwind the errors inside rdt_enable

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Date:   Mon, 9 Oct 2023 14:50:12 -0500
From:   "Moger, Babu" <babu.moger@....com>
To:     Fenghua Yu <fenghua.yu@...el.com>, Borislav Petkov <bp@...en8.de>
Cc:     corbet@....net, reinette.chatre@...el.com, tglx@...utronix.de,
        mingo@...hat.com, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, paulmck@...nel.org, akpm@...ux-foundation.org,
        quic_neeraju@...cinc.com, rdunlap@...radead.org,
        damien.lemoal@...nsource.wdc.com, songmuchun@...edance.com,
        peterz@...radead.org, jpoimboe@...nel.org, pbonzini@...hat.com,
        chang.seok.bae@...el.com, pawan.kumar.gupta@...ux.intel.com,
        jmattson@...gle.com, daniel.sneddon@...ux.intel.com,
        sandipan.das@....com, tony.luck@...el.com, james.morse@....com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
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        christophe.leroy@...roup.eu, jarkko@...nel.org,
        adrian.hunter@...el.com, quic_jiles@...cinc.com,
        peternewman@...gle.com
Subject: Re: [PATCH v11 05/10] x86/resctrl: Unwind the errors inside
 rdt_enable_ctx()

Hi Fenghua,

On 10/9/23 12:40, Fenghua Yu wrote:
> Hi, Babu,
> 
> On 10/9/23 10:25, Borislav Petkov wrote:
>> On Tue, Oct 03, 2023 at 06:54:25PM -0500, Babu Moger wrote:
>>> rdt_enable_ctx() enables the features provided during resctrl mount.
>>>
>>> Additions to rdt_enable_ctx() are required to also modify error paths
>>> of rdt_enable_ctx() callers to ensure correct unwinding if errors
>>> are encountered after calling rdt_enable_ctx(). This is error prone.
>>>
>>> Introduce rdt_disable_ctx() to refactor the error unwinding of
>>> rdt_enable_ctx() to simplify future additions. This also simplifies
>>> cleanup in rdt_kill_sb().
>>>
>>> Remove cdp_disable_all() as it is not used anymore after the refactor.
>>
>> Do not talk about *what* the patch is doing in the commit message - that
>> should be obvious from the diff itself. Rather, concentrate on the *why*
>> it needs to be done.
>>
>> Check your whole series.
> 
> When you send the next patch set, please add the change log in each patch
> after the "---" instead of in the cover patch only. So Boris and others
> clearly know what are changed in each patch.

Sure. Will do in future.
-- 
Thanks
Babu Moger