TDP_COWINPROGRESS
if ((td->td_pflags & (TDP_COWINPROGRESS|TDP_INBDFLUSH)) == 0) {
td->td_pflags |= TDP_COWINPROGRESS;
td->td_pflags &= ~TDP_COWINPROGRESS;
td->td_pflags |= TDP_COWINPROGRESS;
td->td_pflags &= ~TDP_COWINPROGRESS;
td->td_pflags |= TDP_COWINPROGRESS;
td->td_pflags &= ~TDP_COWINPROGRESS;
td->td_pflags |= TDP_COWINPROGRESS;
td->td_pflags &= ~TDP_COWINPROGRESS;
if (td->td_pflags & TDP_COWINPROGRESS)
td->td_pflags |= TDP_COWINPROGRESS | TDP_NORUNNINGBUF;
td->td_pflags &= ~TDP_COWINPROGRESS;
td->td_pflags |= TDP_COWINPROGRESS | TDP_NORUNNINGBUF;
td->td_pflags &= ~TDP_COWINPROGRESS;
if ((curthread->td_pflags & TDP_COWINPROGRESS) || IS_SNAPSHOT(VTOI(vp)))
if (curthread->td_pflags & TDP_COWINPROGRESS)
if ((curthread->td_pflags & TDP_COWINPROGRESS) == 0)