svn commit: r245407 - head/sys/kern

[Konstantin Belousov]

Author: kib
Date: Mon Jan 14 05:42:54 2013
New Revision: 245407
URL: http://svnweb.freebsd.org/changeset/base/245407

Log:
  diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
  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);
   }

Modified:
  head/sys/kern/vfs_subr.c

Modified: head/sys/kern/vfs_subr.c
==============================================================================
--- head/sys/kern/vfs_subr.c    Mon Jan 14 05:41:40 2013        (r245406)
+++ head/sys/kern/vfs_subr.c    Mon Jan 14 05:42:54 2013        (r245407)
@@ -279,6 +279,7 @@ SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhe
 #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_nowhe
 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);
 }
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