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Date: Thu, 13 Jan 2022 09:49:02 +0800
From: kernel test robot <lkp@...el.com>
To: Wang Jianchao <jianchao.wan9@...il.com>, axboe@...nel.dk
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org, jbacik@...com,
tj@...nel.org, bvanassche@....org, linux-block@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] blk: make blk-rq-qos support pluggable and modular
policy
Hi Wang,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tj-cgroup/for-next]
[also build test WARNING on v5.16]
[cannot apply to axboe-block/for-next next-20220112]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Wang-Jianchao/blk-make-blk-rq-qos-policies-pluggable-and-modular/20220110-171347
base: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-next
config: arm-randconfig-r006-20220112 (https://download.01.org/0day-ci/archive/20220113/202201130903.7ZvBIOs4-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 244dd2913a43a200f5a6544d424cdc37b771028b)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://github.com/0day-ci/linux/commit/8bef9fba59d8d47ecaebbeff3e62ee550d89b017
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Wang-Jianchao/blk-make-blk-rq-qos-policies-pluggable-and-modular/20220110-171347
git checkout 8bef9fba59d8d47ecaebbeff3e62ee550d89b017
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
block/blk-iocost.c:1244:6: warning: variable 'last_period' set but not used [-Wunused-but-set-variable]
u64 last_period, cur_period;
^
>> block/blk-iocost.c:3348:7: warning: variable 'ioc' is uninitialized when used here [-Wuninitialized]
if (!ioc) {
^~~
block/blk-iocost.c:3337:17: note: initialize the variable 'ioc' to silence this warning
struct ioc *ioc;
^
= NULL
2 warnings generated.
vim +/ioc +3348 block/blk-iocost.c
7caa47151ab2e64 Tejun Heo 2019-08-28 3331
7caa47151ab2e64 Tejun Heo 2019-08-28 3332 static ssize_t ioc_cost_model_write(struct kernfs_open_file *of, char *input,
7caa47151ab2e64 Tejun Heo 2019-08-28 3333 size_t nbytes, loff_t off)
7caa47151ab2e64 Tejun Heo 2019-08-28 3334 {
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3335 struct block_device *bdev;
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3336 struct rq_qos *rqos;
7caa47151ab2e64 Tejun Heo 2019-08-28 3337 struct ioc *ioc;
7caa47151ab2e64 Tejun Heo 2019-08-28 3338 u64 u[NR_I_LCOEFS];
7caa47151ab2e64 Tejun Heo 2019-08-28 3339 bool user;
7caa47151ab2e64 Tejun Heo 2019-08-28 3340 char *p;
7caa47151ab2e64 Tejun Heo 2019-08-28 3341 int ret;
7caa47151ab2e64 Tejun Heo 2019-08-28 3342
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3343 bdev = blkcg_conf_open_bdev(&input);
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3344 if (IS_ERR(bdev))
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3345 return PTR_ERR(bdev);
7caa47151ab2e64 Tejun Heo 2019-08-28 3346
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3347 rqos = rq_qos_get(bdev_get_queue(bdev), RQ_QOS_COST);
7caa47151ab2e64 Tejun Heo 2019-08-28 @3348 if (!ioc) {
ed6cddefdfd361a Pavel Begunkov 2021-10-14 3349 ret = blk_iocost_init(bdev_get_queue(bdev));
7caa47151ab2e64 Tejun Heo 2019-08-28 3350 if (ret)
7caa47151ab2e64 Tejun Heo 2019-08-28 3351 goto err;
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3352 rqos = rq_qos_get(bdev_get_queue(bdev), RQ_QOS_COST);
7caa47151ab2e64 Tejun Heo 2019-08-28 3353 }
7caa47151ab2e64 Tejun Heo 2019-08-28 3354
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3355 ioc = rqos_to_ioc(rqos);
7caa47151ab2e64 Tejun Heo 2019-08-28 3356 spin_lock_irq(&ioc->lock);
7caa47151ab2e64 Tejun Heo 2019-08-28 3357 memcpy(u, ioc->params.i_lcoefs, sizeof(u));
7caa47151ab2e64 Tejun Heo 2019-08-28 3358 user = ioc->user_cost_model;
7caa47151ab2e64 Tejun Heo 2019-08-28 3359 spin_unlock_irq(&ioc->lock);
7caa47151ab2e64 Tejun Heo 2019-08-28 3360
7caa47151ab2e64 Tejun Heo 2019-08-28 3361 while ((p = strsep(&input, " \t\n"))) {
7caa47151ab2e64 Tejun Heo 2019-08-28 3362 substring_t args[MAX_OPT_ARGS];
7caa47151ab2e64 Tejun Heo 2019-08-28 3363 char buf[32];
7caa47151ab2e64 Tejun Heo 2019-08-28 3364 int tok;
7caa47151ab2e64 Tejun Heo 2019-08-28 3365 u64 v;
7caa47151ab2e64 Tejun Heo 2019-08-28 3366
7caa47151ab2e64 Tejun Heo 2019-08-28 3367 if (!*p)
7caa47151ab2e64 Tejun Heo 2019-08-28 3368 continue;
7caa47151ab2e64 Tejun Heo 2019-08-28 3369
7caa47151ab2e64 Tejun Heo 2019-08-28 3370 switch (match_token(p, cost_ctrl_tokens, args)) {
7caa47151ab2e64 Tejun Heo 2019-08-28 3371 case COST_CTRL:
7caa47151ab2e64 Tejun Heo 2019-08-28 3372 match_strlcpy(buf, &args[0], sizeof(buf));
7caa47151ab2e64 Tejun Heo 2019-08-28 3373 if (!strcmp(buf, "auto"))
7caa47151ab2e64 Tejun Heo 2019-08-28 3374 user = false;
7caa47151ab2e64 Tejun Heo 2019-08-28 3375 else if (!strcmp(buf, "user"))
7caa47151ab2e64 Tejun Heo 2019-08-28 3376 user = true;
7caa47151ab2e64 Tejun Heo 2019-08-28 3377 else
7caa47151ab2e64 Tejun Heo 2019-08-28 3378 goto einval;
7caa47151ab2e64 Tejun Heo 2019-08-28 3379 continue;
7caa47151ab2e64 Tejun Heo 2019-08-28 3380 case COST_MODEL:
7caa47151ab2e64 Tejun Heo 2019-08-28 3381 match_strlcpy(buf, &args[0], sizeof(buf));
7caa47151ab2e64 Tejun Heo 2019-08-28 3382 if (strcmp(buf, "linear"))
7caa47151ab2e64 Tejun Heo 2019-08-28 3383 goto einval;
7caa47151ab2e64 Tejun Heo 2019-08-28 3384 continue;
7caa47151ab2e64 Tejun Heo 2019-08-28 3385 }
7caa47151ab2e64 Tejun Heo 2019-08-28 3386
7caa47151ab2e64 Tejun Heo 2019-08-28 3387 tok = match_token(p, i_lcoef_tokens, args);
7caa47151ab2e64 Tejun Heo 2019-08-28 3388 if (tok == NR_I_LCOEFS)
7caa47151ab2e64 Tejun Heo 2019-08-28 3389 goto einval;
7caa47151ab2e64 Tejun Heo 2019-08-28 3390 if (match_u64(&args[0], &v))
7caa47151ab2e64 Tejun Heo 2019-08-28 3391 goto einval;
7caa47151ab2e64 Tejun Heo 2019-08-28 3392 u[tok] = v;
7caa47151ab2e64 Tejun Heo 2019-08-28 3393 user = true;
7caa47151ab2e64 Tejun Heo 2019-08-28 3394 }
7caa47151ab2e64 Tejun Heo 2019-08-28 3395
7caa47151ab2e64 Tejun Heo 2019-08-28 3396 spin_lock_irq(&ioc->lock);
7caa47151ab2e64 Tejun Heo 2019-08-28 3397 if (user) {
7caa47151ab2e64 Tejun Heo 2019-08-28 3398 memcpy(ioc->params.i_lcoefs, u, sizeof(u));
7caa47151ab2e64 Tejun Heo 2019-08-28 3399 ioc->user_cost_model = true;
7caa47151ab2e64 Tejun Heo 2019-08-28 3400 } else {
7caa47151ab2e64 Tejun Heo 2019-08-28 3401 ioc->user_cost_model = false;
7caa47151ab2e64 Tejun Heo 2019-08-28 3402 }
7caa47151ab2e64 Tejun Heo 2019-08-28 3403 ioc_refresh_params(ioc, true);
7caa47151ab2e64 Tejun Heo 2019-08-28 3404 spin_unlock_irq(&ioc->lock);
7caa47151ab2e64 Tejun Heo 2019-08-28 3405
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3406 rq_qos_put(rqos);
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3407 blkdev_put_no_open(bdev);
7caa47151ab2e64 Tejun Heo 2019-08-28 3408 return nbytes;
7caa47151ab2e64 Tejun Heo 2019-08-28 3409
7caa47151ab2e64 Tejun Heo 2019-08-28 3410 einval:
7caa47151ab2e64 Tejun Heo 2019-08-28 3411 ret = -EINVAL;
8bef9fba59d8d47 Wang Jianchao 2022-01-10 3412 rq_qos_put(rqos);
7caa47151ab2e64 Tejun Heo 2019-08-28 3413 err:
22ae8ce8b89241c Christoph Hellwig 2020-11-26 3414 blkdev_put_no_open(bdev);
7caa47151ab2e64 Tejun Heo 2019-08-28 3415 return ret;
7caa47151ab2e64 Tejun Heo 2019-08-28 3416 }
7caa47151ab2e64 Tejun Heo 2019-08-28 3417
---
0-DAY CI Kernel Test Service, Intel Corporation
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