Bug 204961

Summary:	NFS gives I/O errors on large files
Product:	[Fedora] Fedora	Reporter:	Doug Chapman <dchapman>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED DUPLICATE	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	prarit, wtogami
Target Milestone:	---	Keywords:	Regression
Target Release:	---
Hardware:	ia64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-09-01 20:37:26 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:
Bug Depends On:
Bug Blocks:	163350

Description Doug Chapman 2006-09-01 19:02:06 UTC

Description of problem:
This is beeing seen on my HP Integrity servers.  It may not be ia64 specific but
that is all I have to test on right now.

Note that this blocks NFS installations.

This was originally seen during installation however I am able to reproduce the
root of the problem on a running system where I have installed the appropriate
kernel.

simply trying to cat a large file that is mounted via nfs can reproduce this:

# ls -l stage2.img
-rw-r--r-- 1 root root 93577216 Sep  1 14:22 stage2.img
# cat stage2.img > /dev/null
cat: stage2.img: Input/output error

smaller files seem OK:
# ls -l boot.img
-rw-r--r-- 1 root root 28606464 Sep  1 14:30 boot.img
# cat boot.img > /dev/null
(no error seen)

We ran into this when doing intalls of rawhide and anaconda attempted to
loopback mount the stage2.img file.



Version-Release number of selected component (if applicable):
kernel-2.6.17-1.2608.fc6

How reproducible:
100%

Steps to Reproduce:
1. mkdir /mnt/bigpapi
2. mount bigpapi.boston.redhat.com:/vol/engineering/redhat /mnt/bigpapi
3. cat
/mnt/bigpapi/nightly/rawhide-20060901/development/ia64/os/images/stage2.img >
/dev/null


Actual results:
cat: stage2.img: Input/output error


Expected results:
should get no error


Additional info:

Comment 1 Prarit Bhargava 2006-09-01 19:07:16 UTC

Possibly related to some of the other installation weirdness we're seeing?

Comment 2 Doug Chapman 2006-09-01 19:20:53 UTC

I partly agree with prarit that this might be related to bug 204638 where we
were seenig random panics during NFS installs.  However, this particular aspect
of the bug just started with today's (0901) build and is 100% reproducable.  The
other problems were fairly random and I didn't hit them 100% of the time.

Comment 3 Bill Nottingham 2006-09-01 20:37:26 UTC


*** This bug has been marked as a duplicate of 204859 ***