Hi,
It is observed that ext4 is corrupted easily by running some workloads
on QEMU NVMe, such as:
1) mkfs.ext4 /dev/nvme0n1
2) mount /dev/nvme0n1 /mnt
3) cd /mnt; git clone
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
4) then the following error message may show up:
[ 1642.271816] EXT4-fs error (device nvme0n1): ext4_mb_generate_buddy:747:
group 0, block bitmap and bg descriptor inconsistent: 32768 vs 23513 free
clusters
Or fsck.ext4 will complain after running 'umount /mnt'
The issue disappears by reverting 6e02318eaea53eaafe6 ("nvme: add support for
the
Write Zeroes command").
QEMU version:
QEMU emulator version 2.10.2(qemu-2.10.2-1.fc27)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
Thanks,
Ming
