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

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Message-ID: <20231009172517.GRZSQ3fT05LGgpcW35@fat_crate.local>
Date:   Mon, 9 Oct 2023 19:25:17 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Babu Moger <babu.moger@....com>
Cc:     corbet@....net, reinette.chatre@...el.com, tglx@...utronix.de,
        mingo@...hat.com, fenghua.yu@...el.com,
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        paulmck@...nel.org, akpm@...ux-foundation.org,
        quic_neeraju@...cinc.com, rdunlap@...radead.org,
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        peterz@...radead.org, jpoimboe@...nel.org, pbonzini@...hat.com,
        chang.seok.bae@...el.com, pawan.kumar.gupta@...ux.intel.com,
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        peternewman@...gle.com
Subject: Re: [PATCH v11 05/10] x86/resctrl: Unwind the errors inside
 rdt_enable_ctx()

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.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette