From: "Chen Cheng" <chencheng@fnnas.com>
To: <linux-raid@vger.kernel.org>, <yukuai@fygo.io>, <yukuai@fnnas.com>
Cc: <chencheng@fnnas.com>, <chenchneg33@gmail.com>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH] md/raid5: let stripe batch bm_seq comparison wrap-safe
Date: Thu, 18 Jun 2026 10:57:35 +0800 [thread overview]
Message-ID: <20260618025735.915113-1-chencheng@fnnas.com> (raw)
From: Chen Cheng <chencheng@fnnas.com>
Once the 32-bit seq wraps, a newer bm_seq can look smaller
than old, so .. covert to wrap-safe calculate way.
Signed-off-by: Chen Cheng <chencheng@fnnas.com>
---
drivers/md/raid5.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 6d01c35b5499..a08230aac711 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -997,11 +997,11 @@ static void stripe_add_to_batch_list(struct r5conf *conf,
md_wakeup_thread(conf->mddev->thread);
if (test_and_clear_bit(STRIPE_BIT_DELAY, &sh->state)) {
int seq = sh->bm_seq;
if (test_bit(STRIPE_BIT_DELAY, &sh->batch_head->state) &&
- sh->batch_head->bm_seq > seq)
+ sh->batch_head->bm_seq - seq > 0)
seq = sh->batch_head->bm_seq;
set_bit(STRIPE_BIT_DELAY, &sh->batch_head->state);
sh->batch_head->bm_seq = seq;
}
--
2.54.0
next reply other threads:[~2026-06-18 2:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-18 2:57 Chen Cheng [this message]
2026-06-18 3:12 ` [PATCH] md/raid5: let stripe batch bm_seq comparison wrap-safe sashiko-bot
2026-06-18 3:41 ` Chen Cheng
2026-06-20 21:27 ` yu kuai
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