From: Li Chen <chenl311@chinatelecom.cn>
Date: Mon, 17 Nov 2025 05:34:07 +0000 (+0800)
Subject: block: rate-limit capacity change info log
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3179a5f7f86bcc3acd5d6fb2a29f891ef5615852;p=thirdparty%2Flinux.git

block: rate-limit capacity change info log

loop devices under heavy stress-ng loop streessor can trigger many
capacity change events in a short time. Each event prints an info
message from set_capacity_and_notify(), flooding the console and
contributing to soft lockups on slow consoles.

Switch the printk in set_capacity_and_notify() to
pr_info_ratelimited() so frequent capacity changes do not spam
the log while still reporting occasional changes.

Cc: stable@vger.kernel.org
Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/block/genhd.c b/block/genhd.c
index 9bbc38d127926..bd3a6841e5b59 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -90,7 +90,7 @@ bool set_capacity_and_notify(struct gendisk *disk, sector_t size)
 	    (disk->flags & GENHD_FL_HIDDEN))
 		return false;
 
-	pr_info("%s: detected capacity change from %lld to %lld\n",
+	pr_info_ratelimited("%s: detected capacity change from %lld to %lld\n",
 		disk->disk_name, capacity, size);
 
 	/*