Bug 713063

Summary:	rtl8139:Execute multiple netperf clients caused system call interrupted
Product:	Red Hat Enterprise Linux 5	Reporter:	YangFeng <fyang>
Component:	kvm	Assignee:	jason wang <jasowang>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5.7	CC:	juzhang, michen, mkenneth, rhod, shuang, virt-maint
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	716371 (view as bug list)		Environment:
Last Closed:	2011-10-25 07:59:56 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:	580948, 716371

Description YangFeng 2011-06-14 06:40:51 UTC

Description of problem:
When I run multiple netperf clients on host, they connect with the
netperf-server in guest.
clients fail to execute cmds and output "interrupted system call"

Version-Release number of selected component (if applicable):
kvm-83-236.el5
2.6.18-266.el5

How reproducible:
always

Steps to Reproduce:
1. boot up a guest with rtl8139
2. setup and launch netperf server in guest
guest)# ./netserver
3. setup and launch multiple netperf client in host.
host)# while true;do ./netperf -t TCP_STREAM -H $guest_ip ;echo Tcp:$?;done &
host)# while true;do ./netperf -t UDP_STREAM -H $guest_ip;echo Udp:$?;done &
host)# while true;do ./netperf -H $guest_ip -- -m 200; echo $? Other:$?;done &
  
Actual results:
netperf clients outputted:
interrupted system call 
netperf remote error 4


Expected results:
netperf commands completed. 

Additional info:

Comment 1 Ronen Hod 2011-06-21 17:37:31 UTC

Jason,
is it related to https://bugzilla.redhat.com/show_bug.cgi?id=704097?

Comment 2 jason wang 2011-06-22 02:44:04 UTC

(In reply to comment #1)
> Jason,
> is it related to https://bugzilla.redhat.com/show_bug.cgi?id=704097?

Yes, looks related. 8193 also lacks the check of buffer availability before receiving packets. I can try this.

Comment 3 YangFeng 2011-06-24 06:11:12 UTC

In step 1, I start guest with 4 nics.
In step 3, launch 4 netperf client in host.  one netperf client per guest nic.

Comment 5 Ronen Hod 2011-07-31 13:38:51 UTC

Jason,
If the backport doesn't solve the problem, then we will reconsider the dev-ack+.
Thanks, Ronen.