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Manually clear text references on reclaim for nullfs and tmpfs.

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Both filesystems do no use vnode_pager_dealloc() which would handle
this case otherwise.  Nullfs because vnode vm_object handle never
points to nullfs vnode.  Tmpfs because its vm_object is never vnode
object at all.

Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2019-06-05 20:16:25 +00:00
parent 5568e57d72
commit 3c93d22758
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348698
2 changed files with 4 additions and 0 deletions
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2
sys/fs/nullfs/null_vnops.c
View File

@ -810,6 +810,8 @@ null_reclaim(struct vop_reclaim_args *ap)
*/
if (vp->v_writecount > 0)
VOP_ADD_WRITECOUNT(lowervp, -vp->v_writecount);
else if (vp->v_writecount < 0)
vp->v_writecount = 0;
VI_UNLOCK(vp);

2
sys/fs/tmpfs/tmpfs_subr.c
View File

@ -488,6 +488,8 @@ tmpfs_destroy_vobject(struct vnode *vp, vm_object_t obj)
VI_LOCK(vp);
vm_object_clear_flag(obj, OBJ_TMPFS);
obj->un_pager.swp.swp_tmpfs = NULL;
if (vp->v_writecount < 0)
vp->v_writecount = 0;
VI_UNLOCK(vp);
VM_OBJECT_WUNLOCK(obj);
}