From: Haifeng Xu <haifeng.xu@shopee.com>
To: rppt@kernel.org
Cc: mhocko@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Haifeng Xu <haifeng.xu@shopee.com>
Subject: [PATCH] mm/mm_init.c: add debug messsge for dma zone
Date: Wed, 7 Jun 2023 09:07:34 +0000 [thread overview]
Message-ID: <20230607090734.1259-1-haifeng.xu@shopee.com> (raw)
If freesize is less than dma_reserve, print warning message to report
this case.
Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com>
---
mm/mm_init.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 232efac9a929..9a9d6a52471c 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -1561,9 +1561,14 @@ static void __init free_area_init_core(struct pglist_data *pgdat)
}
/* Account for reserved pages */
- if (j == 0 && freesize > dma_reserve) {
- freesize -= dma_reserve;
- pr_debug(" %s zone: %lu pages reserved\n", zone_names[0], dma_reserve);
+ if (j == 0) {
+ if (freesize >= dma_reserve) {
+ freesize -= dma_reserve;
+ pr_debug(" %s zone: %lu pages reserved\n",
+ zone_names[0], dma_reserve);
+ } else
+ pr_warn(" %s zone: %lu reserved pages exceeds freesize %lu\n",
+ zone_names[0], dma_reserve, freesize);
}
if (!is_highmem_idx(j))
--
2.25.1
next reply other threads:[~2023-06-07 9:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-07 9:07 Haifeng Xu [this message]
2023-06-07 10:16 ` [PATCH] mm/mm_init.c: add debug messsge for dma zone Michal Hocko
2023-06-07 10:22 ` David Hildenbrand
2023-06-08 3:43 ` Haifeng Xu
2023-06-08 7:38 ` Haifeng Xu
2023-06-08 9:18 ` Michal Hocko
2023-06-08 10:13 ` Mike Rapoport
2023-06-08 10:51 ` Haifeng Xu
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