linux-kernel - Re: [PATCH 2/2] mm/damon/paddr: fix folio_nr_pages() after folio_put() in damon_pa_mark_accessed_or

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Date:   Sun, 5 Mar 2023 00:00:37 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     SeongJae Park <sj@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        "Vishal Moola (Oracle)" <vishal.moola@...il.com>,
        damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] mm/damon/paddr: fix folio_nr_pages() after
 folio_put() in damon_pa_mark_accessed_or_deactivate()

On Sat, Mar 04, 2023 at 07:39:49PM +0000, SeongJae Park wrote:
> damon_pa_mark_accessed_or_deactivate() is accessing a folio via
> folio_nr_pages() after folio_put() for the folio has invoked.  Fix it.
> 
> Fixes: f70da5ee8fe1 ("mm/damon: convert damon_pa_mark_accessed_or_deactivate() to use folios")
> Cc: <stable@...r.kernel.org> # 6.3.x
> Signed-off-by: SeongJae Park <sj@...nel.org>

Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>