Bug #42842: CephFS linux kernel hang, v4.15 - CephFS - Ceph

Actions

Copy link

Bug #42842

closed

CephFS linux kernel hang, v4.15

Added by Adam Ludvik over 4 years ago. Updated over 4 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Jeff Layton

Category:

Administration/Usability

Target version:

% Done:

Source:

Community (user)

Tags:

Backport:

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(FS):

Labels (FS):

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

Simple file system operations like df and ls hang and show a status of D+ when running ps. dmesg logs sometimes show "cache_from_obj: Wrong slab cache. inode_cache but object is from ceph_inode_info". Have also seen ls segfault. Also when running fio to benchmark, I have seen "[517501.995780] watchdog: BUG: soft lockup - CPU#23 stuck for 23s! [fio:2110843]".

Possibly related to https://tracker.ceph.com/issues/42707

Seen on:
Linux - 4.15.0-70-generic #79~16.04.1-Ubuntu SMP Tue Nov 12 14:01:10 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Linux - 4.15.0-66-generic #75~16.04.1-Ubuntu SMP Tue Oct 1 14:01:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

I have been testing version 4.15.0-46-generic, and so far it seems stable but I'm not confident yet.

Ceph version installed is "ceph version 14.2.4 (75f4de193b3ea58512f204623e6c5a16e6c1e1ba) nautilus (stable)"