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ZVOL: Make zvol_prefetch_bytes module parameter platform-independent

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The module parameter now is represented in FreeBSD sysctls list
with name: 'vfs.zfs.vol.prefetch_bytes'. The default value is 131072,
same as on Linux side.

Sponsored-by: vStack, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Rob Norris <rob.norris@klarasystems.com>
Signed-off-by: Fedor Uporov <fuporov.vstack@gmail.com>
Closes #17385
This commit is contained in:
Fedor Uporov
2025-05-31 16:58:54 +03:00
committed by GitHub
parent e8e602d987
commit e1677d9ee1
4 changed files with 12 additions and 7 deletions
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module/os/linux/zfs/zvol_os.c
-4
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@@ -51,7 +51,6 @@ static void zvol_request_impl(zvol_state_t *zv, struct bio *bio,
struct request *rq, boolean_t force_sync);
static unsigned int zvol_major = ZVOL_MAJOR;
static unsigned int zvol_prefetch_bytes = (128 * 1024);
static unsigned long zvol_max_discard_blocks = 16384;
#ifndef HAVE_BLKDEV_GET_ERESTARTSYS
@@ -1796,9 +1795,6 @@ MODULE_PARM_DESC(zvol_major, "Major number for zvol device");
module_param(zvol_max_discard_blocks, ulong, 0444);
MODULE_PARM_DESC(zvol_max_discard_blocks, "Max number of blocks to discard");
module_param(zvol_prefetch_bytes, uint, 0644);
MODULE_PARM_DESC(zvol_prefetch_bytes, "Prefetch N bytes at zvol start+end");
module_param(zvol_volmode, uint, 0644);
MODULE_PARM_DESC(zvol_volmode, "Default volmode property value");