svn commit: r330048 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Tue Feb 27 01:36:43 2018
New Revision: 330048
URL: https://svnweb.freebsd.org/changeset/base/330048

Log:
  Add sysctls/tunables for dbuf cache size.
  
  MFC after:	2 weeks

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c	Tue Feb 27 01:28:19 2018	(r330047)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c	Tue Feb 27 01:36:43 2018	(r330048)
@@ -134,6 +134,16 @@ int dbuf_cache_max_shift = 5;
 uint_t dbuf_cache_hiwater_pct = 10;
 uint_t dbuf_cache_lowater_pct = 10;
 
+SYSCTL_DECL(_vfs_zfs);
+SYSCTL_QUAD(_vfs_zfs, OID_AUTO, dbuf_cache_max_bytes, CTLFLAG_RWTUN,
+    &dbuf_cache_max_bytes, 0, "dbuf cache size in bytes");
+SYSCTL_INT(_vfs_zfs, OID_AUTO, dbuf_cache_max_shift, CTLFLAG_RDTUN,
+    &dbuf_cache_max_shift, 0, "dbuf size as log2 fraction of ARC");
+SYSCTL_UINT(_vfs_zfs, OID_AUTO, dbuf_cache_hiwater_pct, CTLFLAG_RWTUN,
+    &dbuf_cache_hiwater_pct, 0, "max percents above the dbuf cache size");
+SYSCTL_UINT(_vfs_zfs, OID_AUTO, dbuf_cache_lowater_pct, CTLFLAG_RWTUN,
+    &dbuf_cache_lowater_pct, 0, "max percents below the dbuf cache size");
+
 /* ARGSUSED */
 static int
 dbuf_cons(void *vdb, void *unused, int kmflag)