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Eliminate the loop and the call to pause(9) in vfs_vget_ino(). If

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vfs_busy(MBF_NOWAIT) failed, unlock the vnode and sleep in vfs_busy().

Suggested and reviewed by:	jeff
Tested by:	pho
MFC after:	3 weeks
This commit is contained in:
Konstantin Belousov 2009-05-07 18:14:21 +00:00
parent 541bfd6180
commit 41b72e6e50
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=191895
1 changed files with 8 additions and 6 deletions
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14
sys/kern/vfs_vnops.c
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@ -1292,15 +1292,17 @@ vn_vget_ino(struct vnode *vp, ino_t ino, int lkflags, struct vnode **rvp)
ltype = VOP_ISLOCKED(vp);
KASSERT(ltype == LK_EXCLUSIVE || ltype == LK_SHARED,
("vn_vget_ino: vp not locked"));
for (;;) {
error = vfs_busy(mp, MBF_NOWAIT);
if (error == 0)
break;
error = vfs_busy(mp, MBF_NOWAIT);
if (error != 0) {
VOP_UNLOCK(vp, 0);
pause("vn_vget", 1);
error = vfs_busy(mp, 0);
vn_lock(vp, ltype | LK_RETRY);
if (vp->v_iflag & VI_DOOMED)
if (error != 0)
return (ENOENT);
if (vp->v_iflag & VI_DOOMED) {
vfs_unbusy(mp);
return (ENOENT);
}
}
VOP_UNLOCK(vp, 0);
error = VFS_VGET(mp, ino, lkflags, rvp);