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- Lock the vm_object when performing either vm_object_clear_flag() or

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vm_object_pip_wakeup().
This commit is contained in:
Alan Cox 2003-04-20 23:23:41 +00:00
parent 6d3138d7b2
commit d7a013c320
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113775
1 changed files with 13 additions and 1 deletions
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14
sys/vm/vm_object.c
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@ -721,7 +721,9 @@ vm_object_page_clean(vm_object_t object, vm_pindex_t start, vm_pindex_t end, int
*/
if (tscan >= tend && (tstart || tend < object->size)) {
vm_page_unlock_queues();
VM_OBJECT_LOCK(object);
vm_object_clear_flag(object, OBJ_CLEANING);
VM_OBJECT_UNLOCK(object);
return;
}
pagerflags &= ~VM_PAGER_IGNORE_CLEANCHK;
@ -747,7 +749,9 @@ vm_object_page_clean(vm_object_t object, vm_pindex_t start, vm_pindex_t end, int
if (clearobjflags && (tstart == 0) && (tend == object->size)) {
struct vnode *vp;
VM_OBJECT_LOCK(object);
vm_object_clear_flag(object, OBJ_WRITEABLE|OBJ_MIGHTBEDIRTY);
VM_OBJECT_UNLOCK(object);
if (object->type == OBJT_VNODE &&
(vp = (struct vnode *)object->handle) != NULL) {
VI_LOCK(vp);
@ -813,7 +817,9 @@ vm_object_page_clean(vm_object_t object, vm_pindex_t start, vm_pindex_t end, int
VOP_FSYNC(vp, NULL, (pagerflags & VM_PAGER_PUT_SYNC)?MNT_WAIT:0, curproc);
#endif
VM_OBJECT_LOCK(object);
vm_object_clear_flag(object, OBJ_CLEANING);
VM_OBJECT_UNLOCK(object);
return;
}
@ -1207,8 +1213,8 @@ vm_object_split(vm_map_entry_t entry)
vm_page_busy(m);
vm_page_unlock_queues();
}
VM_OBJECT_LOCK(orig_object);
if (orig_object->type == OBJT_SWAP) {
VM_OBJECT_LOCK(orig_object);
vm_object_pip_add(orig_object, 1);
VM_OBJECT_UNLOCK(orig_object);
/*
@ -1217,8 +1223,10 @@ vm_object_split(vm_map_entry_t entry)
* shadow object.
*/
swap_pager_copy(orig_object, new_object, offidxstart, 0);
VM_OBJECT_LOCK(orig_object);
vm_object_pip_wakeup(orig_object);
}
VM_OBJECT_UNLOCK(orig_object);
vm_page_lock_queues();
TAILQ_FOREACH(m, &new_object->memq, listq)
vm_page_wakeup(m);
@ -1534,9 +1542,13 @@ vm_object_collapse(vm_object_t object)
backing_object,
object,
OFF_TO_IDX(object->backing_object_offset), TRUE);
VM_OBJECT_LOCK(object);
vm_object_pip_wakeup(object);
VM_OBJECT_UNLOCK(object);
VM_OBJECT_LOCK(backing_object);
vm_object_pip_wakeup(backing_object);
VM_OBJECT_UNLOCK(backing_object);
}
/*
* Object now shadows whatever backing_object did.