FYI, we noticed the following commit (built with gcc-7):

commit: 07173c3ec276cbb18dc0e0687d37d310e98a1480 ("block: enable multipage bvecs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git  master

in testcase: fio-basic
on test machine: 72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 256G memory
with following parameters:

	runtime: 300s
	nr_task: 8t
	disk: 1SSD
	fs: xfs
	rw: randread
	bs: 2M
	ioengine: sync
	test_size: 512g

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):

fio: pid=0, err=5/file:filesetup.c:190, func=fsync, error=Input/output error
fio: pid=0, err=5/file:filesetup.c:190, func=fsync, error=Input/output error

To reproduce:

         git clonehttps://github.com/intel/lkp-tests.git
         cd lkp-tests
         bin/lkp install job.yaml  # job file is attached in this email
         bin/lkp run     job.yaml


Thanks,
Rong Chen