svn commit: r252031 - user/attilio/vmobj-readlock/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Attilio Rao]

Author: attilio
Date: Thu Jun 20 14:20:03 2013
New Revision: 252031
URL: http://svnweb.freebsd.org/changeset/base/252031

Log:
  Reinser VM_ALLOC_IGN_RBUSY type of sleeping on vm_page_grab() for
  mappedread_sf:
  the page is going to be acquired only in read busing.
  
  Sponsored by:	EMC / Isilon storage division

Modified:
  user/attilio/vmobj-readlock/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c

Modified: user/attilio/vmobj-readlock/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
==============================================================================
--- user/attilio/vmobj-readlock/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Thu Jun 20 12:46:03 2013	(r252030)
+++ user/attilio/vmobj-readlock/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	Thu Jun 20 14:20:03 2013	(r252031)
@@ -495,7 +495,7 @@ mappedread_sf(vnode_t *vp, int nbytes, u
 		int bytes = MIN(PAGESIZE, len);
 
 		pp = vm_page_grab(obj, OFF_TO_IDX(start), VM_ALLOC_NOBUSY |
-		    VM_ALLOC_NORMAL | VM_ALLOC_RETRY);
+		    VM_ALLOC_NORMAL | VM_ALLOC_RETRY | VM_ALLOC_IGN_RBUSY);
 		if (pp->valid == 0) {
 			vm_page_io_start(pp);
 			zfs_vmobject_wunlock(obj);