Bug 178634

Summary:	Kernel panic when software RAID 1 is under load
Product:	[Fedora] Fedora	Reporter:	Ra P. <rafapp>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	4	CC:	pfrields, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-05-05 12:59:22 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ra P. 2006-01-22 20:51:52 UTC

From Bugzilla Helper:
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Description of problem:
I have an Athlon 64 Fedora Core 4 system that has been, save this issue, totally stable. Yesterday I
installed two IDE drives on their device chain. These drives were recognized by both the BIOS and
Linux. I formatted them for RAID, created a RAID 1 volume with mdadm, and created an ext3 partition
on the resulting md0 device. All this worked without error.

I then began to copy a large number of files to the RAID volume. Several minutes into this process, the
kernel panicked with a synchronization error. I then rebooted several times with older kernels and
various disk-related services disabled, ultimately discovering from my testing that the problem was in
the Fedora-complied kernel itself.

I built my own kernel from vanilla 2.6.15 source and the system is once again stable, even under heavy
load to the RAID volume for long periods of time.

This absolutely needs to be resolved before Fedora Core 5 ships. Reliable software RAID is a must.

Version-Release number of selected component (if applicable):
kernel-2.6.14-1.1656_FC4-x86_64 (and lower)

How reproducible:
Always

Steps to Reproduce:
1. Create a RAID 1 array of IDE disks with mdadm on a FC4 system with a stock Fedora kernel.
2. Put the new volume under load, for example by copying a large number of flies to it.
3. Wait for the kernel to panic.

Actual Results: A kernel panic.

Expected Results: No kernel panic :)

Additional info:

Not using the RAID features of my BIOS.

Comment 1 Dave Jones 2006-01-24 19:13:51 UTC

'kernel panicked with a synchronization error'
This doesn't give us any information to work with unfortunatly.
Unless you can reproduce this with the latest kernel, there's nothing here to
work with.

Note, that there's a 2.6.15 kernel in updates-testing for FC4 right now.

Comment 2 Dave Jones 2006-02-03 06:04:55 UTC

This is a mass-update to all currently open kernel bugs.

A new kernel update has been released (Version: 2.6.15-1.1830_FC4)
based upon a new upstream kernel release.

Please retest against this new kernel, as a large number of patches
go into each upstream release, possibly including changes that
may address this problem.

This bug has been placed in NEEDINFO_REPORTER state.
Due to the large volume of inactive bugs in bugzilla, if this bug is
still in this state in two weeks time, it will be closed.

Should this bug still be relevant after this period, the reporter
can reopen the bug at any time. Any other users on the Cc: list
of this bug can request that the bug be reopened by adding a
comment to the bug.

If this bug is a problem preventing you from installing the
release this version is filed against, please see bug 169613.

Thank you.

Comment 3 John Thacker 2006-05-05 12:59:22 UTC

Closing due to lack of response.