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Bug 919331

Summary:

windows guest Max support 172 usb2.0 devices(should support 174), Two usb devices show operation failed in 'Device Manager'

Product:

Red Hat Enterprise Linux 6

Reporter:

FuXiangChun <xfu>

Component:

qemu-kvm

Assignee:

Gerd Hoffmann <kraxel>

Status:

CLOSED WONTFIX

QA Contact:

Virtualization Bugs <virt-bugs>

Severity:

low

Docs Contact:

Priority:

low

Version:

6.5

CC:

acathrow, bsarathy, juzhang, michen, mkenneth, qzhang, rhod, virt-bugs, virt-maint, xfu

Target Milestone:

Target Release:

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Hardware:

x86_64

OS:

Windows

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2013-07-25 09:37:49 UTC

Type:

Bug

Regression:

---

Mount Type:

---

Documentation:

---

CRM:

Verified Versions:

Category:

---

oVirt Team:

---

RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

---

Target Upstream Version:

Embargoed:

Attachments:

Description	Flags
boot guest comman line	none
device manager screenshot in windows guest	none

Description FuXiangChun 2013-03-08 07:09:15 UTC

Description of problem:
Test win2012 and win8 guest in rhel6.4 host. Boot guest with 29 ehci controller and each controller attach 6 usb-storage devices. In theory, Should be 174 usb devices are assigned to guest. In fact, only 172 devices are found and work well in 'Disk Management'. other two show failure in 'Device Manager'. I attached a snapshot for 'Device Manager'

Notes: rhel6.4 guest can recolonize all usb devices(174) and work well.  

Version-Release number of selected component (if applicable):
# uname -r
2.6.32-356.el6.x86_6
# rpm -qa|grep qemu
qemu-kvm-0.12.1.2-2.358.el6_4.test.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Boot windows2012 and win8 guest with 29 usb ehci controller.
  Added command line to attachment

2.check 'device manager'

3.check 'Disk management'
  
Actual results:
only 172 usb devices are available

Expected results:
174 usb devices are available

Additional info:
only test win2012 and win8 guest. don't test other windows guest.

Comment 1 FuXiangChun 2013-03-08 07:14:01 UTC

Created attachment 706932 [details]
boot guest comman line

Comment 2 FuXiangChun 2013-03-08 07:16:08 UTC

Created attachment 706933 [details]
device manager screenshot in windows guest

Comment 3 FuXiangChun 2013-03-11 11:38:05 UTC

Tested several scenarios to compare cpu and memory usage for rhel7.0 guest 

1.host cpu usage(before booting guest)
# sar 2 5
Linux 2.6.32-356.el6.x86_64 (dhcp-11-229.nay.redhat.com) 	03/10/2013 	_x86_64_	(8 CPU)

03:09:21 PM     CPU     %user     %nice   %system   %iowait    %steal     %idle
03:09:23 PM     all      0.00      0.00      0.06      0.00      0.00     99.94
03:09:25 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:09:27 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:09:29 PM     all      0.00      0.00      0.06      0.00      0.00     99.94
03:09:31 PM     all      0.06      0.00      0.00      0.00      0.00     99.94
Average:        all      0.01      0.00      0.03      0.00      0.00     99.96
1.1 memory usage(before booting guest)
# free -m
             total       used       free     shared    buffers     cached
Mem:          7828        261       7567          0          9         43
-/+ buffers/cache:        208       7619
Swap:         7967          0       7967

1.2 host cpu usage(after booting guest)
# sar 2 10
Linux 2.6.32-356.el6.x86_64 (dhcp-11-229.nay.redhat.com) 	03/10/2013 	_x86_64_	(8 CPU)

03:15:16 PM     CPU     %user     %nice   %system   %iowait    %steal     %idle
03:15:18 PM     all      2.09      0.00      5.13      0.00      0.00     92.78
03:15:20 PM     all      1.77      0.00      5.56      0.00      0.00     92.67
03:15:22 PM     all      1.83      0.00      5.62      0.13      0.00     92.43
03:15:24 PM     all      1.89      0.00      5.55      0.00      0.00     92.56
03:15:26 PM     all      1.71      0.00      5.44      0.00      0.00     92.85
03:15:28 PM     all      1.71      0.00      5.37      0.00      0.00     92.92
03:15:30 PM     all      1.89      0.00      5.80      0.00      0.00     92.31
03:15:32 PM     all      1.96      0.00      4.80      0.00      0.00     93.24
03:15:34 PM     all      1.90      0.00      5.26      0.00      0.00     92.83
03:15:36 PM     all      1.97      0.00      5.26      0.19      0.00     92.58
Average:        all      1.87      0.00      5.38      0.03      0.00     92.72

1.3 host memory usage(after booting guest)
# free -m
             total       used       free     shared    buffers     cached
Mem:          7828       1163       6665          0          8         42
-/+ buffers/cache:       1112       6716
Swap:         7967          0       7967


2.guest cpu usage(without usb devices)
# sar 2 10
Linux 3.8.0-0.38.el7.x86_64 (dhcp-11-214.nay.redhat.com) 	03/11/2013 	_x86_64_	(2 CPU)

03:24:23 PM     CPU     %user     %nice   %system   %iowait    %steal     %idle
03:24:25 PM     all      0.00      0.00      0.25      0.00      0.00     99.75
03:24:27 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:24:29 PM     all      0.00      0.00      0.25      0.00      0.00     99.75
03:24:31 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:24:33 PM     all      0.25      0.00      0.00      0.00      0.00     99.75
03:24:35 PM     all      0.00      0.00      0.25      0.00      0.00     99.75
03:24:37 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:24:39 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
03:24:41 PM     all      0.00      0.00      0.50      0.00      0.00     99.50
03:24:43 PM     all      0.00      0.00      0.00      0.00      0.00    100.00
Average:        all      0.03      0.00      0.13      0.00      0.00     99.85

2.1 guest memory usage(without usb devices)
# free -m
             total       used       free     shared    buffers     cached
Mem:          1873        494       1379          0          0        195
-/+ buffers/cache:        297       1575
Swap:         4031          0       4031

2.2 guest cpu usage(with usb devices)
sar 2 10
Linux 2.6.32-353.el6.x86_64 (localhost.localdomain) 	03/10/2013 	_x86_64_	(2 CPU)

03:16:06 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle
03:16:08 AM     all      0.52      0.00      4.19      0.00      0.26     95.03
03:16:10 AM     all      0.27      0.00      4.27      0.00      0.00     95.47
03:16:12 AM     all      0.52      0.00      4.96      0.78      0.26     93.47
03:16:14 AM     all      0.26      0.00      3.97      0.00      0.26     95.50
03:16:16 AM     all      0.27      0.00      6.40      0.00      2.67     90.67
03:16:18 AM     all      0.27      0.00      4.24      0.53      0.27     94.69
03:16:20 AM     all      0.27      0.00      5.07      0.00      0.53     94.13
03:16:22 AM     all      0.53      0.00      5.04      0.00      0.00     94.43
03:16:24 AM     all      0.26      0.00      5.00      0.79      0.26     93.68
03:16:26 AM     all      0.52      0.00      6.27      0.00      0.26     92.95
Average:        all      0.37      0.00      4.94      0.21      0.48     94.00

2.3 guest memory usage(with usb devices)
# free -m
             total       used       free     shared    buffers     cached
Mem:          3831       539        3292         0          21         175
-/+ buffers/cache:       342        3489
Swap:         4031         0        4031

Comment 4 Ronen Hod 2013-05-26 17:27:25 UTC

FuXiangChun, Gerd,
It looks like a duplicate of bug 882050. What do you think?

Comment 5 FuXiangChun 2013-05-27 10:07:39 UTC

(In reply to Ronen Hod from comment #4)
> FuXiangChun, Gerd,
> It looks like a duplicate of bug 882050. What do you think?

It looks like they are the same issue.  only usb-storage devices number and guest are different.

Comment 6 Ronen Hod 2013-07-25 09:37:49 UTC

Closing.
Unlikely to be fixed in RHEL6.
Please test with RHEL7, and file a new BZ

Comment 7 FuXiangChun 2013-07-26 09:01:35 UTC

Re-tested this issue in RHEL7.0 host.  Don't hit this issue. so needn't open a new bug in RHEL7.