tree:   https://github.com/0day-ci/linux/commits/UPDATE-20220111-073805/trondmy-kernel-org/iomap-Address-soft-lockup-in-iomap_finish_ioend/20211231-034313
head:   f1c8b8b2e616895aa0f5be4e53d4cd1ffa751001
commit: f1c8b8b2e616895aa0f5be4e53d4cd1ffa751001 iomap: Address soft lockup in iomap_finish_ioend()
date:   3 days ago
config: arm-randconfig-m031-20220113 (https://download.01.org/0day-ci/archive/20220113/202201132101.AoT0bCj5-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

New smatch warnings:
fs/iomap/buffered-io.c:1098 iomap_finish_ioends() warn: inconsistent indenting
fs/iomap/buffered-io.c:1330 iomap_add_to_ioend() warn: inconsistent indenting

Old smatch warnings:
fs/iomap/buffered-io.c:1434 iomap_writepage_map() warn: inconsistent indenting

vim +1098 fs/iomap/buffered-io.c

  1072	
  1073	/*
  1074	 * Ioend completion routine for merged bios. This can only be called from task
  1075	 * contexts as merged ioends can be of unbound length. Hence we have to break up
  1076	 * the page writeback completion into manageable chunks to avoid long scheduler
  1077	 * holdoffs. We aim to keep scheduler holdoffs down below 10ms so that we get
  1078	 * good batch processing throughput without creating adverse scheduler latency
  1079	 * conditions.
  1080	 */
  1081	void
  1082	iomap_finish_ioends(struct iomap_ioend *ioend, int error)
  1083	{
  1084		struct list_head tmp;
  1085		u32 pages;
  1086	
  1087		might_sleep();
  1088	
  1089		list_replace_init(&ioend->io_list, &tmp);
  1090		pages = iomap_finish_ioend(ioend, error);
  1091	
  1092		while (!list_empty(&tmp)) {
  1093		trace_printk("pages %u, start sector 0x%llx size %lu pcnt %u",
  1094			ioend->io_pages,
  1095			ioend->io_sector,
  1096			ioend->io_size,
  1097			pages);
> 1098			if (pages > 32768) {
  1099				cond_resched();
  1100				pages = 0;
  1101			}
  1102			ioend = list_first_entry(&tmp, struct iomap_ioend, io_list);
  1103			list_del_init(&ioend->io_list);
  1104			pages += iomap_finish_ioend(ioend, error);
  1105		}
  1106		trace_printk("pages %u, start sector 0x%llx size %lu pcnt %u",
  1107			ioend->io_pages,
  1108			ioend->io_sector,
  1109			ioend->io_size,
  1110			pages);
  1111	}
  1112	EXPORT_SYMBOL_GPL(iomap_finish_ioends);
  1113	

---
0-DAY CI Kernel Test Service, Intel Corporation
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