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authorLars Ellenberg <lars.ellenberg@linbit.com>2016-06-14 01:26:23 +0300
committerJens Axboe <axboe@fb.com>2016-06-14 06:43:05 +0300
commit505675f96cf0f169647a18c3dda1f373eca957b1 (patch)
treecd9e16e66de8d3abfc9e69eb9a14bfe9b5f72569 /include
parent7435e9018f9141e38d856229475335c8e757a497 (diff)
downloadlinux-505675f96cf0f169647a18c3dda1f373eca957b1.tar.xz
drbd: allow larger max_discard_sectors
Make sure we have at least 67 (> AL_UPDATES_PER_TRANSACTION) al-extents available, and allow up to half of that to be discarded in one bio. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/drbd_limits.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index a351c40087cd..ddac68422a96 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -126,8 +126,7 @@
#define DRBD_RESYNC_RATE_DEF 250
#define DRBD_RESYNC_RATE_SCALE 'k' /* kilobytes */
- /* less than 7 would hit performance unnecessarily. */
-#define DRBD_AL_EXTENTS_MIN 7
+#define DRBD_AL_EXTENTS_MIN 67
/* we use u16 as "slot number", (u16)~0 is "FREE".
* If you use >= 292 kB on-disk ring buffer,
* this is the maximum you can use: */