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

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Date:   Wed, 8 Jun 2022 15:32:28 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Wupeng Ma <mawupeng1@...wei.com>, corbet@....net, will@...nel.org,
        ardb@...nel.org, catalin.marinas@....com
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        dvhart@...radead.org, andy@...radead.org, rppt@...nel.org,
        akpm@...ux-foundation.org, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu, paulmck@...nel.org,
        keescook@...omium.org, songmuchun@...edance.com,
        rdunlap@...radead.org, damien.lemoal@...nsource.wdc.com,
        swboyd@...omium.org, wei.liu@...nel.org, robin.murphy@....com,
        david@...hat.com, thunder.leizhen@...wei.com,
        wangkefeng.wang@...wei.com, gpiccoli@...lia.com,
        chenhuacai@...nel.org, geert@...ux-m68k.org, chenzhou10@...wei.com,
        vijayb@...ux.microsoft.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-mm@...ck.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v3 3/6] mm: Ratelimited mirrored memory related warning
 messages



On 6/7/22 15:08, 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>
> ---
>  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;
>  	}

Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>