linux-kernel - Re: [PATCH 9/9] mm/madvise: remove !tlb support from madvise_{dontneed,free}_single

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Message-Id: <20250311210211.85566-1-sj@kernel.org>
Date: Tue, 11 Mar 2025 14:02:11 -0700
From: SeongJae Park <sj@...nel.org>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <howlett@...il.com>,
	David Hildenbrand <david@...hat.com>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Vlastimil Babka <vbabka@...e.cz>,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 9/9] mm/madvise: remove !tlb support from madvise_{dontneed,free}_single_vma()

On Tue, 11 Mar 2025 14:01:20 +0000 Lorenzo Stoakes <lorenzo.stoakes@...cle.com> wrote:

> On Mon, Mar 10, 2025 at 10:23:18AM -0700, SeongJae Park wrote:
> > madvise_dontneed_single_vma() and madvise_free_single_vma() support both
> > batched tlb flushes and unbatched tlb flushes use cases depending on
> > received tlb parameter's value.  The supports were for safe and fine
> > transition of the usages from the unbatched flushes to the batched ones.
> > Now the transition is done, and therefore there is no real unbatched tlb
> > flushes use case.  Remove the code for supporting the no more being used
> > cases.
> >
> > Signed-off-by: SeongJae Park <sj@...nel.org>
> 
> Obviously I support this based on previous preview :) but I wonder if we
> can avoid this horrid caller_tlb pattern in the first instance.

I will try, though I have no good idea for that for now.

Maybe we could simply squash patches 7-9.  I'm bit concerned if it makes
changes unnecessariy mixed and not small, but I have no strong opinion about
it.  Please feel free to let me know if you want that.

> 
> FWIW:
> 
> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

Appreciate your reviews!


Thanks,
SJ

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