Author: mav
Date: Sun Mar 20 19:07:12 2016
New Revision: 297073
URL: https://svnweb.freebsd.org/changeset/base/297073
Log:
MFC r277492 (by will): Add vfs.zfs.reference_tracking_enable sysctl/tunable.
This is primarily for developer/debugging use; it enables built-in tagged
tracking of refcounts inside ZFS. It can only be enabled from the loader,
since it modifies how in-core state is managed. Default remains disabled.
Modified:
stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c Sun Mar
20 19:06:21 2016 (r297072)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c Sun Mar
20 19:07:12 2016 (r297073)
@@ -30,6 +30,11 @@
#ifdef _KERNEL
int reference_tracking_enable = FALSE; /* runs out of memory too easily */
+SYSCTL_DECL(_vfs_zfs);
+TUNABLE_INT("vfs.zfs.reference_tracking_enable", &reference_tracking_enable);
+SYSCTL_INT(_vfs_zfs, OID_AUTO, reference_tracking_enable, CTLFLAG_RDTUN,
+ &reference_tracking_enable, 0,
+ "Track reference holders to refcount_t objects, used mostly by ZFS");
#else
int reference_tracking_enable = TRUE;
#endif
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