linux-kernel - Re: [v3 PATCH 2/5] mm: filemap: check if THP has hwpoisoned subpage for PMD page fault

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Message-ID: <20211004140637.qejvenbkmrulqdno@box.shutemov.name>
Date:   Mon, 4 Oct 2021 17:06:37 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Yang Shi <shy828301@...il.com>
Cc:     naoya.horiguchi@....com, hughd@...gle.com,
        kirill.shutemov@...ux.intel.com, willy@...radead.org,
        peterx@...hat.com, osalvador@...e.de, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [v3 PATCH 2/5] mm: filemap: check if THP has hwpoisoned subpage
 for PMD page fault

On Thu, Sep 30, 2021 at 02:53:08PM -0700, Yang Shi wrote:
> diff --git a/mm/filemap.c b/mm/filemap.c
> index dae481293b5d..2acc2b977f66 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -3195,12 +3195,12 @@ static bool filemap_map_pmd(struct vm_fault *vmf, struct page *page)
>  	}
>  
>  	if (pmd_none(*vmf->pmd) && PageTransHuge(page)) {
> -	    vm_fault_t ret = do_set_pmd(vmf, page);
> -	    if (!ret) {
> -		    /* The page is mapped successfully, reference consumed. */
> -		    unlock_page(page);
> -		    return true;
> -	    }
> +		vm_fault_t ret = do_set_pmd(vmf, page);
> +		if (!ret) {
> +			/* The page is mapped successfully, reference consumed. */
> +			unlock_page(page);
> +			return true;
> +		}
>  	}
>  
>  	if (pmd_none(*vmf->pmd)) {

Hm. Is it unrelated whitespace fix?

-- 
 Kirill A. Shutemov