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

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Date:   Tue, 7 Jun 2022 17:38:02 +0800
From:   Wupeng Ma <mawupeng1@...wei.com>
To:     <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>,
        <mawupeng1@...wei.com>, <anshuman.khandual@....com>,
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        <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: [PATCH v3 3/6] mm: Ratelimited mirrored memory related warning messages

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;
 	}
-- 
2.25.1