path: root/include/linux/drbd_limits.h
diff options
authorLars Ellenberg <lars.ellenberg@linbit.com>2010-08-11 23:40:24 +0200
committerPhilipp Reisner <philipp.reisner@linbit.com>2010-10-14 18:38:20 +0200
commit0f0601f4ea2f53cfd8bcae060fb03d9bbde070ec (patch)
tree42bcbd8edf48c9cee526893108cc69b4918a9f64 /include/linux/drbd_limits.h
parent80a40e439e5a3f30b0a6210a1add6d7c33392e54 (diff)
drbd: new configuration parameter c-min-rate
We now track the data rate of locally submitted resync related requests, and can thus detect non-resync activity on the lower level device. If the current sync rate is above c-min-rate, and the lower level device appears to be busy, we throttle the resyncer. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'include/linux/drbd_limits.h')
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 06dbba47a8e..0b24ded6fff 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -150,5 +150,9 @@
#define DRBD_C_MAX_RATE_MAX (4 << 20)
#define DRBD_C_MAX_RATE_DEF 102400
+#define DRBD_C_MIN_RATE_MIN 0 /* kByte/sec */
+#define DRBD_C_MIN_RATE_MAX (4 << 20)
+#define DRBD_C_MIN_RATE_DEF 4096
#undef RANGE