Bug 112101

Summary:	cgroup kmem limit causing kernel BUG and complete lockup
Product:	File System	Reporter:	nfnty (arch)
Component:	btrfs	Assignee:	Josef Bacik (josef)
Status:	RESOLVED CODE_FIX
Severity:	high	CC:	anand.jain, dsterba, szg00000
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.1.17-1-lts	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	BUG traces

Description nfnty 2016-02-07 14:12:54 UTC

Created attachment 203081 [details]
BUG traces

Happened in connection to Docker limiting container cgroup kmem to 4194304 requiring a hard reset and resulting in data loss.

Full issue report here: https://github.com/docker/docker/issues/20080

Attached BUG traces.

Comment 1 Anand Jain 2017-04-11 04:48:55 UTC

this bug is already been fixed by

commit 059f791c6bbaba72dc3c1bd6e2657aacc8552849
Author: David Sterba <dsterba@suse.com>
Date:   Wed Apr 27 01:03:45 2016 +0200

    btrfs: make state preallocation more speculative in __set_extent_bit