linux-kernel - Re: [PATCH v3 5/5] mm/khugepaged: Convert collapse_pte_mapped

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Date:   Mon, 23 Oct 2023 22:43:06 -0400
From:   Rik van Riel <riel@...riel.com>
To:     "Vishal Moola (Oracle)" <vishal.moola@...il.com>,
        linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH v3 5/5] mm/khugepaged: Convert collapse_pte_mapped_thp()
 to use folios

On Fri, 2023-10-20 at 11:33 -0700, Vishal Moola (Oracle) wrote:
> This removes 2 calls to compound_head() and helps convert khugepaged
> to
> use folios throughout.
> 
> Previously, if the address passed to collapse_pte_mapped_thp()
> corresponded to a tail page, the scan would fail immediately. Using
> filemap_lock_folio() we get the corresponding folio back and try to
> operate on the folio instead.
> 
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>

Reviewed-by: Rik van Riel <riel@...riel.com>

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