Hi Douglas, Thank you for the patch! Yet something to improve: [auto build test ERROR on scsi/for-next] [cannot apply to v5.3 next-20190925] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Douglas-Gilbert/scsi_debug-randomize-command-duration-option-p/20190927-094954 base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: i386-randconfig-f004-201938 (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): ld: drivers/scsi/scsi_debug.o: in function `schedule_resp': >> drivers/scsi/scsi_debug.c:4365: undefined reference to `__udivdi3' vim +4365 drivers/scsi/scsi_debug.c 4251 4252 /* Complete the processing of the thread that queued a SCSI command to this 4253 * driver. It either completes the command by calling cmnd_done() or 4254 * schedules a hr timer or work queue then returns 0. Returns 4255 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. 4256 */ 4257 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, 4258 int scsi_result, 4259 int (*pfp)(struct scsi_cmnd *, 4260 struct sdebug_dev_info *), 4261 int delta_jiff, int ndelay) 4262 { 4263 unsigned long iflags; 4264 int k, num_in_q, qdepth, inject; 4265 struct sdebug_queue *sqp; 4266 struct sdebug_queued_cmd *sqcp; 4267 struct scsi_device *sdp; 4268 struct sdebug_defer *sd_dp; 4269 4270 if (unlikely(devip == NULL)) { 4271 if (scsi_result == 0) 4272 scsi_result = DID_NO_CONNECT << 16; 4273 goto respond_in_thread; 4274 } 4275 sdp = cmnd->device; 4276 4277 if (delta_jiff == 0) 4278 goto respond_in_thread; 4279 4280 /* schedule the response at a later time if resources permit */ 4281 sqp = get_queue(cmnd); 4282 spin_lock_irqsave(&sqp->qc_lock, iflags); 4283 if (unlikely(atomic_read(&sqp->blocked))) { 4284 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4285 return SCSI_MLQUEUE_HOST_BUSY; 4286 } 4287 num_in_q = atomic_read(&devip->num_in_q); 4288 qdepth = cmnd->device->queue_depth; 4289 inject = 0; 4290 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) { 4291 if (scsi_result) { 4292 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4293 goto respond_in_thread; 4294 } else 4295 scsi_result = device_qfull_result; 4296 } else if (unlikely(sdebug_every_nth && 4297 (SDEBUG_OPT_RARE_TSF & sdebug_opts) && 4298 (scsi_result == 0))) { 4299 if ((num_in_q == (qdepth - 1)) && 4300 (atomic_inc_return(&sdebug_a_tsf) >= 4301 abs(sdebug_every_nth))) { 4302 atomic_set(&sdebug_a_tsf, 0); 4303 inject = 1; 4304 scsi_result = device_qfull_result; 4305 } 4306 } 4307 4308 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue); 4309 if (unlikely(k >= sdebug_max_queue)) { 4310 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4311 if (scsi_result) 4312 goto respond_in_thread; 4313 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts) 4314 scsi_result = device_qfull_result; 4315 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) 4316 sdev_printk(KERN_INFO, sdp, 4317 "%s: max_queue=%d exceeded, %s\n", 4318 __func__, sdebug_max_queue, 4319 (scsi_result ? "status: TASK SET FULL" : 4320 "report: host busy")); 4321 if (scsi_result) 4322 goto respond_in_thread; 4323 else 4324 return SCSI_MLQUEUE_HOST_BUSY; 4325 } 4326 __set_bit(k, sqp->in_use_bm); 4327 atomic_inc(&devip->num_in_q); 4328 sqcp = &sqp->qc_arr[k]; 4329 sqcp->a_cmnd = cmnd; 4330 cmnd->host_scribble = (unsigned char *)sqcp; 4331 sd_dp = sqcp->sd_dp; 4332 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4333 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt)) 4334 setup_inject(sqp, sqcp); 4335 if (sd_dp == NULL) { 4336 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC); 4337 if (sd_dp == NULL) 4338 return SCSI_MLQUEUE_HOST_BUSY; 4339 } 4340 4341 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; 4342 if (cmnd->result & SDEG_RES_IMMED_MASK) { 4343 /* 4344 * This is the F_DELAY_OVERR case. No delay. 4345 */ 4346 cmnd->result &= ~SDEG_RES_IMMED_MASK; 4347 delta_jiff = ndelay = 0; 4348 } 4349 if (cmnd->result == 0 && scsi_result != 0) 4350 cmnd->result = scsi_result; 4351 4352 if (unlikely(sdebug_verbose && cmnd->result)) 4353 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", 4354 __func__, cmnd->result); 4355 4356 if (delta_jiff > 0 || ndelay > 0) { 4357 ktime_t kt; 4358 4359 if (delta_jiff > 0) { 4360 u64 ns = (u64)delta_jiff * (NSEC_PER_SEC / HZ); 4361 4362 if (sdebug_random && ns < U32_MAX) { 4363 ns = prandom_u32_max((u32)ns); 4364 } else if (sdebug_random) { > 4365 ns /= 1000; 4366 if (ns < U32_MAX) /* an hour and a bit */ 4367 ns = prandom_u32_max((u32)ns); 4368 ns *= 1000; 4369 } 4370 kt = ns_to_ktime(ns); 4371 } else { 4372 kt = sdebug_random ? prandom_u32_max((u32)ndelay) : 4373 (u32)ndelay; 4374 } 4375 if (!sd_dp->init_hrt) { 4376 sd_dp->init_hrt = true; 4377 sqcp->sd_dp = sd_dp; 4378 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, 4379 HRTIMER_MODE_REL_PINNED); 4380 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; 4381 sd_dp->sqa_idx = sqp - sdebug_q_arr; 4382 sd_dp->qc_idx = k; 4383 } 4384 if (sdebug_statistics) 4385 sd_dp->issuing_cpu = raw_smp_processor_id(); 4386 sd_dp->defer_t = SDEB_DEFER_HRT; 4387 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); 4388 } else { /* jdelay < 0, use work queue */ 4389 if (!sd_dp->init_wq) { 4390 sd_dp->init_wq = true; 4391 sqcp->sd_dp = sd_dp; 4392 sd_dp->sqa_idx = sqp - sdebug_q_arr; 4393 sd_dp->qc_idx = k; 4394 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); 4395 } 4396 if (sdebug_statistics) 4397 sd_dp->issuing_cpu = raw_smp_processor_id(); 4398 sd_dp->defer_t = SDEB_DEFER_WQ; 4399 if (unlikely(sqcp->inj_cmd_abort)) 4400 sd_dp->aborted = true; 4401 schedule_work(&sd_dp->ew.work); 4402 if (unlikely(sqcp->inj_cmd_abort)) { 4403 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", 4404 cmnd->request->tag); 4405 blk_abort_request(cmnd->request); 4406 } 4407 } 4408 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && 4409 (scsi_result == device_qfull_result))) 4410 sdev_printk(KERN_INFO, sdp, 4411 "%s: num_in_q=%d +1, %s%s\n", __func__, 4412 num_in_q, (inject ? "<inject> " : ""), 4413 "status: TASK SET FULL"); 4414 return 0; 4415 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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