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id = 649
title = "qemu-6.1.0 causes I/O errors in VMs leading to data corruption"
state = "opened"
created_at = "2021-09-29T17:41:09.971Z"
closed_at = "n/a"
labels = ["Storage"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/649"
host-os = "Gentoo Linux"
host-arch = "amd64"
qemu-version = "6.1.0"
guest-os = "Gentoo Linux"
guest-arch = "amd64"
description = """after upgrading around 10 gentoo hosts from qemu-6.0.0-r53 to 6.1.0 most VMs (around 85 of 100, our VMs with PostgreSQL have 100% chance of hitting this) after some time (few minutes) will have I/O Errors, causing crashes and data corruption.
The VMs are stored on ZFS volumes.
Downgrading to qemu-6.0.0-r53 instantly fixes this.
Happens on completely different hardware (quad core Xeons to 32C Epyc2).
Reproducible: Always"""
reproduce = "n/a"
additional = "n/a"
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