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

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Message-ID: <1dca24a0-b538-86c1-a0f5-68fad15e76fe@huawei.com>
Date:   Fri, 10 Jun 2022 17:29:04 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.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>,
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        <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 2022/6/7 17:38, 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: Kefeng Wang <wangkefeng.wang@...wei.com>