linux-kernel - Re: [PATCH 08/41] mm: introduce CONFIG_PER_VMA

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Message-ID: <20230111001331.cxdeh52vvta6ok2p@offworld>
Date:   Tue, 10 Jan 2023 16:13:31 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     akpm@...ux-foundation.org, michel@...pinasse.org,
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Subject: Re: [PATCH 08/41] mm: introduce CONFIG_PER_VMA_LOCK

On Mon, 09 Jan 2023, Suren Baghdasaryan wrote:

>This configuration variable will be used to build the support for VMA
>locking during page fault handling.
>
>This is enabled by default on supported architectures with SMP and MMU
>set.
>
>The architecture support is needed since the page fault handler is called
>from the architecture's page faulting code which needs modifications to
>handle faults under VMA lock.

I don't think that per-vma locking should be something that is user-configurable.
It should just be depdendant on the arch. So maybe just remove CONFIG_PER_VMA_LOCK?

Thanks,
Davidlohr