// inner handler writes header and then let the request time out.
				w.WriteHeader(http.StatusBadRequest)
				<-callerRoundTripDoneCh

				// we expect the timeout handler to have timed out this request by now and any attempt
				// to write to the response should return a http.ErrHandlerTimeout error.
				_, innerHandlerWriteErr := w.Write([]byte("foo"))
				reqHandlerErrCh <- innerHandlerWriteErr

// type conversions. If so, then in the general case it writes
//
//	_cgoIndexNN := a
//	_cgoNN := &cgoIndexNN[i] // with type conversions, if any
//
// to sb, and writes
//
//	_cgoCheckPointer(_cgoNN, _cgoIndexNN)
//
// to sbCheck, and returns true. If a is a simple variable or field reference,
// it writes
//
//	_cgoIndexNN := &a
//

    /** Non-volatile write of the thread to the {@link Waiter#thread} field. */
    abstract void putThread(Waiter waiter, Thread newValue);

    /** Non-volatile write of the waiter to the {@link Waiter#next} field. */
    abstract void putNext(Waiter waiter, @CheckForNull Waiter newValue);

    /** Performs a CAS operation on the {@link #waiters} field. */
    abstract boolean casWaiters(

    /** Non-volatile write of the thread to the {@link Waiter#thread} field. */
    abstract void putThread(Waiter waiter, Thread newValue);

    /** Non-volatile write of the waiter to the {@link Waiter#next} field. */
    abstract void putNext(Waiter waiter, @CheckForNull Waiter newValue);

    /** Performs a CAS operation on the {@link #waiters} field. */
    abstract boolean casWaiters(

	if !dirty && cfg.CmdName != "mod tidy" {
		// The go.mod file has the same semantic content that it had before
		// (but not necessarily the same exact bytes).
		// Don't write go.mod, but write go.sum in case we added or trimmed sums.
		// 'go mod init' shouldn't write go.sum, since it will be incomplete.
		if cfg.CmdName != "mod init" {

// DisruptionsAllowed to 1.
// (B) As the DisruptionController attempts this write, we will evict the
// remaining 2 pods and update DisruptionsAllowed to 0. (The real eviction
// handler would allow this because it still sees DisruptionsAllowed=2.)
// (C) If the DisruptionController writes DisruptionsAllowed=1 despite the
// resource conflict error, then there is a bug.
func TestUpdatePDBStatusRetries(t *testing.T) {

	if cap(buf) < len(buf)+20 {
		b := make([]byte, len(buf), 20+cap(buf)*2)
		copy(b, buf)
		buf = b
	}
	writeAt := len(buf)
	buf = buf[0 : len(buf)+ctxt.Arch.PtrSize]
	writePtr(ctxt, buf[writeAt:], word)
	return buf
}

// Write a pointer-sized uint to the beginning of buf.
func writePtr(ctxt *obj.Link, buf []byte, word uint64) {
	switch ctxt.Arch.PtrSize {
	case 4:

		defer xioutil.ODirectPoolLarge.Put(bufp)
	}

	var written int64
	if odirectEnabled {
		written, err = xioutil.CopyAligned(diskHealthWriter(ctx, w), r, *bufp, fileSize, w)
	} else {
		written, err = io.CopyBuffer(diskHealthWriter(ctx, w), r, *bufp)
	}
	if err != nil {
		w.Close()
		return err
	}

	if written < fileSize && fileSize >= 0 {
		w.Close()
		return errLessData

	// span is used.
	//
	// Reads and writes are atomic.
	pageInUse [pagesPerArena / 8]uint8

	// pageMarks is a bitmap that indicates which spans have any
	// marked objects on them. Like pageInUse, only the bit
	// corresponding to the first page in each span is used.
	//
	// Writes are done atomically during marking. Reads are

  //    visible to done(). This is because there is no happens before edge between the write and a
  //    (hypothetical) unsafe read by our caller. Note: adding 'volatile' does not fix this issue,
  //    it would just add an edge such that if done() observed non-null, then it would also