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diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c

Browse Source 
index 7c243b6..0bdaf36 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -279,6 +279,7 @@ SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW,
 #define VSHOULDFREE(vp) (!((vp)->v_iflag & VI_FREE) && !(vp)->v_holdcnt)
 #define VSHOULDBUSY(vp) (((vp)->v_iflag & VI_FREE) && (vp)->v_holdcnt)

+static int vnsz2log;

 /*
  * Initialize the vnode management data structures.
@@ -293,6 +294,7 @@ SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW,
 static void
 vntblinit(void *dummy __unused)
 {
+	u_int i;
 	int physvnodes, virtvnodes;

 	/*
@@ -332,6 +334,9 @@ vntblinit(void *dummy __unused)
 	syncer_maxdelay = syncer_mask + 1;
 	mtx_init(&sync_mtx, "Syncer mtx", NULL, MTX_DEF);
 	cv_init(&sync_wakeup, "syncer");
+	for (i = 1; i <= sizeof(struct vnode); i <<= 1)
+		vnsz2log++;
+	vnsz2log--;
 }
 SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_FIRST, vntblinit, NULL);

@@ -1067,6 +1072,14 @@ alloc:
 	}
 	rangelock_init(&vp->v_rl);

+	/*
+	 * For the filesystems which do not use vfs_hash_insert(),
+	 * still initialize v_hash to have vfs_hash_index() useful.
+	 * E.g., nullfs uses vfs_hash_index() on the lower vnode for
+	 * its own hashing.
+	 */
+	vp->v_hash = (uintptr_t)vp >> vnsz2log;
+
 	*vpp = vp;
 	return (0);
 }
This commit is contained in:
Konstantin Belousov 2013-01-14 05:42:54 +00:00
parent f6af8e375c
commit a41df84820
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=245407
1 changed files with 13 additions and 0 deletions
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13
sys/kern/vfs_subr.c
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@ -279,6 +279,7 @@ SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW,
#define VSHOULDFREE(vp) (!((vp)->v_iflag & VI_FREE) && !(vp)->v_holdcnt)
#define VSHOULDBUSY(vp) (((vp)->v_iflag & VI_FREE) && (vp)->v_holdcnt)
static int vnsz2log;
/*
* Initialize the vnode management data structures.
@ -293,6 +294,7 @@ SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW,
static void
vntblinit(void *dummy __unused)
{
u_int i;
int physvnodes, virtvnodes;
/*
@ -332,6 +334,9 @@ vntblinit(void *dummy __unused)
syncer_maxdelay = syncer_mask + 1;
mtx_init(&sync_mtx, "Syncer mtx", NULL, MTX_DEF);
cv_init(&sync_wakeup, "syncer");
for (i = 1; i <= sizeof(struct vnode); i <<= 1)
vnsz2log++;
vnsz2log--;
}
SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_FIRST, vntblinit, NULL);
@ -1067,6 +1072,14 @@ getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops,
}
rangelock_init(&vp->v_rl);
/*
* For the filesystems which do not use vfs_hash_insert(),
* still initialize v_hash to have vfs_hash_index() useful.
* E.g., nullfs uses vfs_hash_index() on the lower vnode for
* its own hashing.
*/
vp->v_hash = (uintptr_t)vp >> vnsz2log;
*vpp = vp;
return (0);
}