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| author | Lars Ellenberg | 2016-06-14 00:26:23 +0200 |
|---|---|---|
| committer | Jens Axboe | 2016-06-14 05:43:05 +0200 |
| commit | 505675f96cf0f169647a18c3dda1f373eca957b1 (patch) | |
| tree | cd9e16e66de8d3abfc9e69eb9a14bfe9b5f72569 /drivers/block/drbd/drbd_int.h | |
| parent | drbd: zero-out partial unaligned discards on local backend (diff) | |
| download | kernel-qcow2-linux-505675f96cf0f169647a18c3dda1f373eca957b1.tar.gz kernel-qcow2-linux-505675f96cf0f169647a18c3dda1f373eca957b1.tar.xz kernel-qcow2-linux-505675f96cf0f169647a18c3dda1f373eca957b1.zip | |
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 'drivers/block/drbd/drbd_int.h')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 0b5a658882b2..9c68ec54a247 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1347,10 +1347,10 @@ struct bm_extent { #define DRBD_MAX_SIZE_H80_PACKET (1U << 15) /* Header 80 only allows packets up to 32KiB data */ #define DRBD_MAX_BIO_SIZE_P95 (1U << 17) /* Protocol 95 to 99 allows bios up to 128KiB */ -/* For now, don't allow more than one activity log extent worth of data - * to be discarded in one go. We may need to rework drbd_al_begin_io() - * to allow for even larger discard ranges */ -#define DRBD_MAX_DISCARD_SIZE AL_EXTENT_SIZE +/* For now, don't allow more than half of what we can "activate" in one + * activity log transaction to be discarded in one go. We may need to rework + * drbd_al_begin_io() to allow for even larger discard ranges */ +#define DRBD_MAX_DISCARD_SIZE (AL_UPDATES_PER_TRANSACTION/2*AL_EXTENT_SIZE) #define DRBD_MAX_DISCARD_SECTORS (DRBD_MAX_DISCARD_SIZE >> 9) extern int drbd_bm_init(struct drbd_device *device); |