Re: [PATCH] block/blk-iolatency: Add the processing flow of the chained bio in the QoS and define the related types to solve the problem of incorrect inflight processing in the QoS. The usage of the done_split_bio abstract function in the blk-iolatency project.
From: kernel test robot
Date: Sat May 02 2026 - 19:35:59 EST
Hi Li,
kernel test robot noticed the following build errors:
[auto build test ERROR on axboe/for-next]
[also build test ERROR on linus/master v7.1-rc1 next-20260430]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Li-kunyu/block-blk-iolatency-Add-the-processing-flow-of-the-chained-bio-in-the-QoS-and-define-the-related-types-to-solve-the-prob/20260502-071718
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git for-next
patch link: https://lore.kernel.org/r/20260429094148.2394-1-likunyu10%40163.com
patch subject: [PATCH] block/blk-iolatency: Add the processing flow of the chained bio in the QoS and define the related types to solve the problem of incorrect inflight processing in the QoS. The usage of the done_split_bio abstract function in the blk-iolatency project.
config: riscv-allnoconfig (https://download.01.org/0day-ci/archive/20260503/202605030725.SpXiNjpU-lkp@xxxxxxxxx/config)
compiler: riscv64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260503/202605030725.SpXiNjpU-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605030725.SpXiNjpU-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
block/blk-merge.c: In function 'bio_submit_split':
>> block/blk-merge.c:159:38: error: 'split' undeclared (first use in this function); did you mean 'sg_split'?
159 | bio_set_flag(split, BIO_QOS_CHAIN_CHILD);
| ^~~~~
| sg_split
block/blk-merge.c:159:38: note: each undeclared identifier is reported only once for each function it appears in
vim +159 block/blk-merge.c
142
143 static struct bio *bio_submit_split(struct bio *bio, int split_sectors)
144 {
145 if (unlikely(split_sectors < 0)) {
146 bio->bi_status = errno_to_blk_status(split_sectors);
147 bio_endio(bio);
148 return NULL;
149 }
150
151 if (split_sectors) {
152 bio = bio_submit_split_bioset(bio, split_sectors,
153 &bio->bi_bdev->bd_disk->bio_split);
154 if (bio) {
155 bio->bi_opf |= REQ_NOMERGE;
156 /* Fix the issue where the inflight statistics
157 * of the chained bio in the QoS are incorrect.
158 */
> 159 bio_set_flag(split, BIO_QOS_CHAIN_CHILD);
160 }
161 }
162
163 return bio;
164 }
165
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