[RFC PATCH RESEND 03/28] mm: introduce __find_vma to be used without mmap_lock protection

[Suren Baghdasaryan]

On Thu, Sep 1, 2022 at 1:22 PM Kent Overstreet
<kent.overstreet at linux.dev> wrote:
>
> On Thu, Sep 01, 2022 at 10:34:51AM -0700, Suren Baghdasaryan wrote:
> > Add __find_vma function to be used for VMA lookup under rcu protection.
>
> So it was news to me that the rb tree code can be used for lockless lookups -
> not having looked at lib/rbtree.c in over 10 years :) - I still think it should
> be mentioned in the commit message that that's what you're doing and why it's
> safe, because it's not exactly common knowledge and lockless stuff deserves
> extra scrutiny.
>
> Probably worth a comment, too.

Ack.

>
> Reviewed-by: Kent Overstreet <kent.overstreet at linux.dev>

Thanks!

>
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