686518 – >=sys-kernel/gentoo-sources-5.1: device mapper and discard can lead to data loss

Bug 686518 - >=sys-kernel/gentoo-sources-5.1: device mapper and discard can lead to data loss

Summary: >=sys-kernel/gentoo-sources-5.1: device mapper and discard can lead to data loss

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	Current packages (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers

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Depends on:
Blocks:

Reported:	2019-05-22 00:50 UTC by Zoltan Puskas
Modified:	2019-05-27 19:54 UTC (History)
CC List:	1 user (show)

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Runtime testing required:	---

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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.