Bug 686518

Summary:	>=sys-kernel/gentoo-sources-5.1: device mapper and discard can lead to data loss
Product:	Gentoo Linux	Reporter:	Zoltan Puskas <zoltan>
Component:	Current packages	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	gentoo
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Zoltan Puskas 2019-05-22 00:50:23 UTC

When using and SSD, where the storage stack includes device mapper (e.g. LVM, dm-luks, etc), can potentially lead to data loss when discard is enabled (or running fstrim).

Apparently it effects kernels >=5.1.

Related discussion:
https://www.redhat.com/archives/dm-devel/2019-May/msg00082.html

Apparent fix:
https://www.redhat.com/archives/dm-devel/2019-May/msg00102.html

Comment 1 Mike Pagano gentoo-dev

2019-05-27 19:54:23 UTC

All affected 5.1 kernels removed from vanilla and gentoo-sources.

Thanks for reporting.