diff options
| -rw-r--r-- | module/zfs/zvol.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c index 125d58de9..32e4f3c1e 100644 --- a/module/zfs/zvol.c +++ b/module/zfs/zvol.c @@ -49,6 +49,7 @@ unsigned int zvol_inhibit_dev = 0; unsigned int zvol_major = ZVOL_MAJOR; unsigned int zvol_threads = 32; +unsigned long zvol_max_discard_blocks = 16384; static taskq_t *zvol_taskq; static kmutex_t zvol_state_lock; @@ -1242,7 +1243,8 @@ __zvol_create_minor(const char *name) blk_queue_physical_block_size(zv->zv_queue, zv->zv_volblocksize); blk_queue_io_opt(zv->zv_queue, zv->zv_volblocksize); #ifdef HAVE_BLK_QUEUE_DISCARD - blk_queue_max_discard_sectors(zv->zv_queue, UINT_MAX); + blk_queue_max_discard_sectors(zv->zv_queue, + (zvol_max_discard_blocks * zv->zv_volblocksize) >> 9); queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, zv->zv_queue); #endif #ifdef HAVE_BLK_QUEUE_NONROT @@ -1446,3 +1448,6 @@ MODULE_PARM_DESC(zvol_major, "Major number for zvol device"); module_param(zvol_threads, uint, 0444); MODULE_PARM_DESC(zvol_threads, "Number of threads for zvol device"); + +module_param(zvol_max_discard_blocks, ulong, 0444); +MODULE_PARM_DESC(zvol_max_discard_blocks, "Max number of blocks to discard at once"); |