In a PVE 4.4 cluster i continue to get FS errors like:

 Oct 22 20:51:10 vdmsv1 kernel: [268329.890910] EXT4-fs error (device sda6): 
ext4_mb_generate_buddy:758: group 932, block bitmap and bg descriptor 
inconsistent: 30722 vs 32768 free clusters

and

 Oct 23 09:43:16 vdmsv1 kernel: [314655.032561] EXT4-fs error (device sdb1): 
ext4_validate_block_bitmap:384: comm kworker/u8:2: bg 12: bad block bitmap 
checksum
 Oct 23 09:43:16 vdmsv1 kernel: [314655.034265] EXT4-fs (sdb1): Delayed block 
allocation failed for inode 2632026 at logical offset 2048 with max blocks 1640 
with error 74
 Oct 23 09:43:16 vdmsv1 kernel: [314655.034335] EXT4-fs (sdb1): This should not 
happen!! Data will be lost

Host run 4.4.134-1-pve kernel, and guest is a debian stretch
(4.9.0-8-amd64), and in the same cluster, but also in other clusters, i
have other stretch VMs running in the same host kernel, without
troubles.

Googling around lead me to old jessie bugs (kernels 3.16):

        https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1423672
        https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818502#22

or things i make it hard to correlate with:

        https://access.redhat.com/solutions/155873


Someone have some hints?! Thanks.

-- 
dott. Marco Gaiarin                                     GNUPG Key ID: 240A3D66
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                Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA!
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        (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA)
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