linux-kernel - Re: [PATCH 1/3] mm/page_alloc: use might

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Message-ID: <5f295a8f-058a-97d1-d9e0-095fdb5e5a7c@kernel.org>
Date:   Tue, 14 Jun 2022 15:07:40 +0200
From:   "Vlastimil Babka (SUSE)" <vbabka@...nel.org>
To:     Daniel Vetter <daniel.vetter@...ll.ch>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     DRI Development <dri-devel@...ts.freedesktop.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Subject: Re: [PATCH 1/3] mm/page_alloc: use might_alloc()

On 6/5/22 17:25, Daniel Vetter wrote:
> ... instead of open codding it. Completely equivalent code, just
> a notch more meaningful when reading.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: linux-mm@...ck.org

Reviewed-by: Vlastimil Babka <vbabka@...e.cz>

> ---
>  mm/page_alloc.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 2db95780e003..277774d170cb 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -5177,10 +5177,7 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order,
>  			*alloc_flags |= ALLOC_CPUSET;
>  	}
>  
> -	fs_reclaim_acquire(gfp_mask);
> -	fs_reclaim_release(gfp_mask);
> -
> -	might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM);
> +	might_alloc(gfp_mask);
>  
>  	if (should_fail_alloc_page(gfp_mask, order))
>  		return false;