Re: [PATCH] shmem: Update folio if shmem_replace_page() updates the page

[William Kucharski]

Looks good.

Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx>


> On Jul 29, 2022, at 10:25 PM, Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote:
> 
> If we allocate a new page, we need to make sure that our folio matches
> that new page.  This will be solved by changing shmem_replace_page()
> to shmem_replace_folio(), but this is the minimal fix.
> 
> Fixes: da08e9b79323 ("mm/shmem: convert shmem_swapin_page() to shmem_swapin_folio()")
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> ---
> mm/shmem.c | 1 +
> 1 file changed, 1 insertion(+)
> 
> diff --git a/mm/shmem.c b/mm/shmem.c
> index a6f565308133..bcc0a3c7b5bf 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -1771,6 +1771,7 @@ static int shmem_swapin_folio(struct inode *inode, pgoff_t index,
> 
> if (shmem_should_replace_folio(folio, gfp)) {
> error = shmem_replace_page(&page, gfp, info, index);
> + folio = page_folio(page);
> if (error)
> goto failed;
> }
> -- 
> 2.35.1