Author: delphij
Date: Tue Nov 18 18:40:01 2014
New Revision: 274673
URL: https://svnweb.freebsd.org/changeset/base/274673
Log:
Allow tuning zfs_max_recordsize via loader tunable. Tuning is NOT
recommended.
Requested by: Slawa Olhovchenkov <slw zxy spb ru>
MFC after: 2 weeks
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Tue Nov
18 18:03:40 2014 (r274672)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Tue Nov
18 18:40:01 2014 (r274673)
@@ -51,6 +51,8 @@
#include <sys/dsl_userhold.h>
#include <sys/dsl_bookmark.h>
+SYSCTL_DECL(_vfs_zfs);
+
/*
* The SPA supports block sizes up to 16MB. However, very large blocks
* can have an impact on i/o latency (e.g. tying up a spinning disk for
@@ -61,6 +63,9 @@
* of this setting.
*/
int zfs_max_recordsize = 1 * 1024 * 1024;
+SYSCTL_INT(_vfs_zfs, OID_AUTO, max_recordsize, CTLFLAG_RDTUN,
+ &zfs_max_recordsize, 0,
+ "Maximum block size. Expect dragons when tuning this.");
#define SWITCH64(x, y) \
{ \
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