linux-kernel - Re: [PATCH 4/5] mm/madvise: thread all madvise state through madv

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Message-ID: <70EF3B55-2F36-4980-9944-E47E6C64570B@nvidia.com>
Date: Thu, 19 Jun 2025 22:20:23 -0400
From: Zi Yan <ziy@...dia.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...hat.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>, Nico Pache <npache@...hat.com>,
 Ryan Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>,
 Barry Song <baohua@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
 Jann Horn <jannh@...gle.com>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, Lance Yang <ioworker0@...il.com>,
 SeongJae Park <sj@...nel.org>, Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [PATCH 4/5] mm/madvise: thread all madvise state through
 madv_behavior

On 19 Jun 2025, at 16:26, Lorenzo Stoakes wrote:

> Doing so means we can get rid of all the weird struct vm_area_struct **prev
> stuff, everything becomes consistent and in future if we want to make
> change to behaviour there's a single place where all relevant state is
> stored.
>
> This also allows us to update try_vma_read_lock() to be a little more
> succinct and set up state for us, as well as cleaning up
> madvise_update_vma().
>
> We also update the debug assertion prior to madvise_update_vma() to assert
> that this is a write operation as correctly pointed out by Barry in the
> relevant thread.
>
> We can't reasonably update the madvise functions that live outside of
> mm/madvise.c so we leave those as-is.
>
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> ---
>  mm/madvise.c | 283 ++++++++++++++++++++++++++-------------------------
>  1 file changed, 146 insertions(+), 137 deletions(-)
>

Acked-by: Zi Yan <ziy@...dia.com>

--
Best Regards,
Yan, Zi