From: "Christoph Böhmwalder" <christoph.boehmwalder@linbit.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: "Philipp Reisner" <philipp.reisner@linbit.com>,
"Lars Ellenberg" <lars@linbit.com>,
drbd-dev@lists.linux.dev, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Christoph Böhmwalder" <christoph.boehmwalder@linbit.com>,
"Lars Ellenberg" <lars.ellenberg@linbit.com>
Subject: [PATCH 4/7] drbd: raise the maximum resync rate to 8 GiB/s
Date: Wed, 23 Sep 2026 16:06:05 +0200 [thread overview]
Message-ID: <20260923140608.1116713-5-christoph.boehmwalder@linbit.com> (raw)
In-Reply-To: <20260923140608.1116713-1-christoph.boehmwalder@linbit.com>
The resync-rate limit tops out at 4 GiB/s, which was chosen for bonded
10 GbE. Current hardware exceeds that with a single link. Double the
limit to 8 GiB/s, matching DRBD 9, and make the constant unsigned like
its neighbours.
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
---
include/uapi/linux/drbd_limits.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/drbd_limits.h b/include/uapi/linux/drbd_limits.h
index 4132b619376c..bba0a0aa8792 100644
--- a/include/uapi/linux/drbd_limits.h
+++ b/include/uapi/linux/drbd_limits.h
@@ -121,7 +121,7 @@
/* FIXME allow rate to be zero? */
#define DRBD_RESYNC_RATE_MIN 1U
/* channel bonding 10 GbE, or other hardware */
-#define DRBD_RESYNC_RATE_MAX (4 << 20)
+#define DRBD_RESYNC_RATE_MAX (8U << 20)
#define DRBD_RESYNC_RATE_DEF 250U
#define DRBD_RESYNC_RATE_SCALE 'k' /* kilobytes */
--
2.55.0
next prev parent reply other threads:[~2026-09-23 14:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-23 14:06 [PATCH 0/7] drbd: preparation for DRBD 9 Christoph Böhmwalder
2026-09-23 14:06 ` [PATCH 1/7] drbd: rename drbd_worker.c to drbd_sender.c Christoph Böhmwalder
2026-09-23 14:06 ` [PATCH 2/7] drbd: modernize the file header comments Christoph Böhmwalder
2026-09-23 14:06 ` [PATCH 3/7] drbd: raise the socket buffer size limits to 128 MiB Christoph Böhmwalder
2026-09-23 14:06 ` Christoph Böhmwalder [this message]
2026-09-23 14:06 ` [PATCH 5/7] drbd: replace the drbd_interval bitfields with a type and flags Christoph Böhmwalder
2026-09-23 14:06 ` [PATCH 6/7] drbd: move the packet name table to drbd_strings.c Christoph Böhmwalder
2026-09-23 14:06 ` [PATCH 7/7] drbd: rate limit log messages per object Christoph Böhmwalder
2026-11-09 17:22 ` [PATCH 0/7] drbd: preparation for DRBD 9 Christoph Böhmwalder
2026-11-09 17:40 ` Jens Axboe
2026-11-09 17:40 ` Jens Axboe
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