Bug 899540

Summary:	sys-libs/liburing-2.3-r4: tests cause RCU hang on ppc (timberdoodle) and sparc (catbus)?
Product:	Gentoo Linux	Reporter:	Sam James <sam>
Component:	Current packages	Assignee:	Florian Schmaus <flow>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	arthurzam, kernel, pacho, ppc64, ppc, sparc
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	892453

Description Sam James archtester

2023-03-04 05:21:23 UTC

Filing this as a note for the arch teams rather than expecting maintainer to handle (but help welcome!), but we had a few RCU hangs in a row on both machines and a liburing test was spinning on both of them with a large amount of CPU time.

Comment 1 Pacho Ramos gentoo-dev

2024-06-05 13:18:22 UTC

Is this still the case with 2.6 version?

Comment 2 Andreas Sturmlechner gentoo-dev

2024-09-22 20:18:52 UTC

Please test with 2.7-r1.

Comment 3 Sam James archtester

2024-10-12 14:55:14 UTC

I don't think this happens on timberdoodle anymore but it does still on sparc.

Comment 4 Larry the Git Cow gentoo-dev

2024-10-12 14:57:47 UTC

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=856f939b83d68eb3bab444cdcea2918e1248f7cb

commit 856f939b83d68eb3bab444cdcea2918e1248f7cb
Author:     Sam James <sam@gentoo.org>
AuthorDate: 2024-10-12 14:54:22 +0000
Commit:     Sam James <sam@gentoo.org>
CommitDate: 2024-10-12 14:54:46 +0000

    profiles/arch/sparc: mask liburing[test]
    
    Exposes a kernel bug which causes system lockup on catbus at least.
    
    Bug: https://bugs.gentoo.org/899540
    Signed-off-by: Sam James <sam@gentoo.org>

 profiles/arch/sparc/package.use.mask | 4 ++++
 1 file changed, 4 insertions(+)

Comment 5 Sam James archtester

2024-10-12 15:04:12 UTC

(In reply to Sam James from comment #3)
> I don't think this happens on timberdoodle anymore but it does still on
> sparc.

(with 5.15.110-gentoo-r1 on catbus)