linux-kernel - Re: [PATCH v3 3/6] mm: Ratelimited mirrored memory related warning messages

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Date:   Wed, 8 Jun 2022 12:44:44 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Wupeng Ma <mawupeng1@...wei.com>
Cc:     corbet@....net, will@...nel.org, ardb@...nel.org,
        catalin.marinas@....com, tglx@...utronix.de, mingo@...hat.com,
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Subject: Re: [PATCH v3 3/6] mm: Ratelimited mirrored memory related warning
 messages

On Tue, Jun 07, 2022 at 05:38:02PM +0800, Wupeng Ma wrote:
> From: Ma Wupeng <mawupeng1@...wei.com>
> 
> If system has mirrored memory, memblock will try to allocate mirrored
> memory firstly and fallback to non-mirrored memory when fails, but if with
> limited mirrored memory or some numa node without mirrored memory, lots of
> warning message about memblock allocation will occur.
> 
> This patch ratelimit the warning message to avoid a very long print during
> bootup.
> 
> Signed-off-by: Ma Wupeng <mawupeng1@...wei.com>

Acked-by: Mike Rapoport <rppt@...ux.ibm.com>

> ---
>  mm/memblock.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/memblock.c b/mm/memblock.c
> index e4f03a6e8e56..b1d2a0009733 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -327,7 +327,7 @@ static phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start,
>  					    NUMA_NO_NODE, flags);
>  
>  	if (!ret && (flags & MEMBLOCK_MIRROR)) {
> -		pr_warn("Could not allocate %pap bytes of mirrored memory\n",
> +		pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n",
>  			&size);
>  		flags &= ~MEMBLOCK_MIRROR;
>  		goto again;
> @@ -1384,7 +1384,7 @@ phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
>  
>  	if (flags & MEMBLOCK_MIRROR) {
>  		flags &= ~MEMBLOCK_MIRROR;
> -		pr_warn("Could not allocate %pap bytes of mirrored memory\n",
> +		pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n",
>  			&size);
>  		goto again;
>  	}
> -- 
> 2.25.1
> 

-- 
Sincerely yours,
Mike.