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Bug 956608

Summary: Fail to detect all the disks in guest when boot VM with more then 40 usb-storage disks
Product: Red Hat Enterprise Linux 7 Reporter: Sibiao Luo <sluo>
Component: qemu-kvmAssignee: Gerd Hoffmann <kraxel>
Status: CLOSED CURRENTRELEASE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: acathrow, chayang, hhuang, juzhang, kraxel, michen, mrezanin, qzhang, rhod, shuang, sluo, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: qemu-kvm-1.5.0-1.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-06-13 11:16:16 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
guest dmesg log.
none
the qtree info and qemu-kvm command line. none

Description Sibiao Luo 2013-04-25 10:05:40 UTC 
Description of problem:
boot guest with more than 40 usb-storage disks using the companion controller (ich9-ehci-uhci.cfg), but guest only can detect 40 usb-storage disks.
BTW, it maybe the same issue to bug 905851 in rhel6.

Version-Release number of selected component (if applicable):
host info:
kernel-3.9.0-0.rc7.53.el7.x86_64
qemu-kvm-1.4.0-2.1.el7.x86_64
seabios-1.7.2-0.2.gita810e4e7.el7.x86_64
guest info:
kernel-3.9.0-0.rc7.53.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.boot guest with 41~55 usb-storage disks using the companion controller (ich9-ehci-uhci.cfg)
2.check the usb info via HMP monitor and guest.
(qemu) info usb
(qemu) info qtree
guest]# ls -l /dev/sd* 
guest]# ls -l /dev/sd* | wc -l
  
Actual results:
after guest boot up, only can detect 40 disks in guest. I will attach the qemu-kvm command line and the guest kernel logs later.
# ls -l /dev/sd*
brw-rw----. 1 root disk  8,   0 Apr 25 17:52 /dev/sda
brw-rw----. 1 root disk 65, 160 Apr 25 17:52 /dev/sdaa
brw-rw----. 1 root disk 65, 176 Apr 25 17:52 /dev/sdab
brw-rw----. 1 root disk 65, 192 Apr 25 17:52 /dev/sdac
brw-rw----. 1 root disk 65, 208 Apr 25 17:52 /dev/sdad
brw-rw----. 1 root disk 65, 224 Apr 25 17:52 /dev/sdae
brw-rw----. 1 root disk 65, 240 Apr 25 17:52 /dev/sdaf
brw-rw----. 1 root disk 66,   0 Apr 25 17:52 /dev/sdag
brw-rw----. 1 root disk 66,  16 Apr 25 17:52 /dev/sdah
brw-rw----. 1 root disk 66,  32 Apr 25 17:52 /dev/sdai
brw-rw----. 1 root disk 66,  48 Apr 25 17:52 /dev/sdaj
brw-rw----. 1 root disk 66,  64 Apr 25 17:52 /dev/sdak
brw-rw----. 1 root disk 66,  80 Apr 25 17:52 /dev/sdal
brw-rw----. 1 root disk 66,  96 Apr 25 17:52 /dev/sdam
brw-rw----. 1 root disk 66, 112 Apr 25 17:52 /dev/sdan
brw-rw----. 1 root disk  8,  16 Apr 25 17:52 /dev/sdb
brw-rw----. 1 root disk  8,  32 Apr 25 17:52 /dev/sdc
brw-rw----. 1 root disk  8,  48 Apr 25 17:52 /dev/sdd
brw-rw----. 1 root disk  8,  64 Apr 25 17:52 /dev/sde
brw-rw----. 1 root disk  8,  80 Apr 25 17:52 /dev/sdf
brw-rw----. 1 root disk  8,  96 Apr 25 17:52 /dev/sdg
brw-rw----. 1 root disk  8, 112 Apr 25 17:52 /dev/sdh
brw-rw----. 1 root disk  8, 128 Apr 25 17:52 /dev/sdi
brw-rw----. 1 root disk  8, 144 Apr 25 17:52 /dev/sdj
brw-rw----. 1 root disk  8, 160 Apr 25 17:52 /dev/sdk
brw-rw----. 1 root disk  8, 176 Apr 25 17:52 /dev/sdl
brw-rw----. 1 root disk  8, 192 Apr 25 17:52 /dev/sdm
brw-rw----. 1 root disk  8, 208 Apr 25 17:52 /dev/sdn
brw-rw----. 1 root disk  8, 224 Apr 25 17:52 /dev/sdo
brw-rw----. 1 root disk  8, 240 Apr 25 17:52 /dev/sdp
brw-rw----. 1 root disk 65,   0 Apr 25 17:52 /dev/sdq
brw-rw----. 1 root disk 65,  16 Apr 25 17:52 /dev/sdr
brw-rw----. 1 root disk 65,  32 Apr 25 17:52 /dev/sds
brw-rw----. 1 root disk 65,  48 Apr 25 17:52 /dev/sdt
brw-rw----. 1 root disk 65,  64 Apr 25 17:52 /dev/sdu
brw-rw----. 1 root disk 65,  80 Apr 25 17:52 /dev/sdv
brw-rw----. 1 root disk 65,  96 Apr 25 17:52 /dev/sdw
brw-rw----. 1 root disk 65, 112 Apr 25 17:52 /dev/sdx
brw-rw----. 1 root disk 65, 128 Apr 25 17:52 /dev/sdy
brw-rw----. 1 root disk 65, 144 Apr 25 17:52 /dev/sdz
# ls -l /dev/sd* | wc -l
40

Expected results:
should can detect all the usb storage disks in guest.

Additional info:
Comment 1 Sibiao Luo 2013-04-25 10:08:32 UTC 
Created attachment 739784 [details]
guest dmesg log.
Comment 2 Sibiao Luo 2013-04-25 10:09:06 UTC 
Created attachment 739786 [details]
the qtree info and qemu-kvm command line.
Comment 3 Sibiao Luo 2013-04-26 02:53:28 UTC 
Tried the windos2012-64 that also hit the same issue, only can detect 40 disks in guest.
Comment 4 Gerd Hoffmann 2013-05-14 12:45:49 UTC 
most likaly also usb hubs nesting too deep.
qemu 1.5 will verify this (commit c24e4aac3bd7dd6591e26b77985e5d3915ecbe4b).
Comment 5 Gerd Hoffmann 2013-05-14 14:27:26 UTC 
*** Bug 920108 has been marked as a duplicate of this bug. ***
Comment 6 Miroslav Rezanina 2013-05-23 11:54:19 UTC 
Build in qemu-kvm-1.5.0-1.el7
Comment 7 Sibiao Luo 2013-07-08 08:42:01 UTC 
Still hit it on qemu-kvm-1.5.1-2.el7.x86_64.
host info:
3.10.0-0.rc7.64.el7.x86_64
qemu-kvm-1.5.1-2.el7.x86_64
guest info:
3.10.0-0.rc7.64.el7.x86_64

Steps:
the same to comment #0.

Result:
boot guest with more than 40 usb-storage disks(e.g: 42 ) using the companion controller (ich9-ehci-uhci.cfg), but guest only can detect 40 usb-storage disks.
# ls -l /dev/sd* | wc -l
40
QEMU only has 40 disks from info usb.
(qemu) info usb
  Device 0.1, Port 1, Speed 480 Mb/s, Product QEMU USB MSD
  Device 0.2, Port 2, Speed 480 Mb/s, Product QEMU USB MSD
  Device 0.3, Port 3, Speed 480 Mb/s, Product QEMU USB MSD
  Device 0.4, Port 4, Speed 480 Mb/s, Product QEMU USB MSD
  Device 0.5, Port 5, Speed 480 Mb/s, Product QEMU USB MSD
  Device 0.1, Port 6, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.2, Port 6.1, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.3, Port 6.2, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.4, Port 6.3, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.5, Port 6.4, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.6, Port 6.5, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.7, Port 6.6, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.8, Port 6.7, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.9, Port 6.8, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.11, Port 6.8.1, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.12, Port 6.8.2, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.13, Port 6.8.3, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.14, Port 6.8.4, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.17, Port 6.8.5, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.6, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.7, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.0, Port 6.8.8.1, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.2, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.3, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.4, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.5, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.6, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.7, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.0, Port 6.8.8.8.1, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.2, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.3, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.4, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.5, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.6, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.7, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8, Speed 12 Mb/s, Product QEMU USB Hub
  Device 0.0, Port 6.8.8.8.8.1, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.2, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.3, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.4, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.5, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.6, Speed 12 Mb/s, Product QEMU USB MSD
  Device 0.0, Port 6.8.8.8.8.7, Speed 12 Mb/s, Product QEMU USB MSD
(qemu) 

Base on above, re-assign it again. please correct me if mistake.

Best Regards,
sluo
Comment 8 Gerd Hoffmann 2013-07-24 07:45:39 UTC 
please add the exact command line to the bug.
Comment 9 Sibiao Luo 2013-07-24 08:11:22 UTC 
(In reply to Gerd Hoffmann from comment #8)
> please add the exact command line to the bug.
please refer to attachment 739786 [details] for qemu-kvm command line and info qtree.
and the attachment 739784 [details] for guest dmesg log.

Best Regards,
sluo
Comment 10 Gerd Hoffmann 2013-07-24 12:47:28 UTC 
Doesn't match what I see in testing.  qemu refuses to start with "qemu-system-x86_64: -device usb-storage,drive=usbstick-41,removable=on: usb hub chain too deep" for me, which is the expected behavior.  Please double-check.
Comment 11 Sibiao Luo 2013-07-25 02:39:21 UTC 
(In reply to Gerd Hoffmann from comment #10)
> Doesn't match what I see in testing.  qemu refuses to start with
> "qemu-system-x86_64: -device usb-storage,drive=usbstick-41,removable=on: usb
> hub chain too deep" for me, which is the expected behavior.  Please
> double-check.
yes, retried it again, just expected result now.
host info:
3.10.0-0.rc7.64.el7.x86_64
qemu-kvm-1.5.1-2.el7.x86_64
guest info:
3.10.0-0.rc7.64.el7.x86_64

If i start 42 usb-storage, qemu will quit with prompt that usb hub chain too deep.
QEMU 1.5.1 monitor - type 'help' for more information
(qemu) qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: usb hub chain too deep
qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: Device initialization failed.
qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: Failed to initialize USB device 'usb-hub'
qemu-kvm: -device usb-storage,drive=drive-usb-0-42,id=usb-0-42,removable=on: Error: tried to attach usb device QEMU USB MSD to a bus with no free ports
qemu-kvm: -device usb-storage,drive=drive-usb-0-42,id=usb-0-42,removable=on: Device initialization failed.
qemu-kvm: -device usb-storage,drive=drive-usb-0-42,id=usb-0-42,removable=on: Device 'usb-storage' could not be initialized
/etc/qemu-ifdown: could not launch network script

If i start 41 usb-storage, guest can boot up successfully and all the 41 usb-storage can be detected in guest correctly.
# ls -l /dev/sd* | wc -l
41

Base on above, this issue has been fixed correctly, So please ignore comment #7.
Comment 12 juzhang 2013-07-25 02:42:28 UTC 
According to comment11, back to ON_QA status.
Comment 13 Sibiao Luo 2014-01-02 06:05:20 UTC 
Verify this issue on qemu-kvm-1.5.3-30.el7.x86_64 with the same comment #0 and comment #10. QEMU will give a warning message that usb hub chain too deep when boot guest with more than 41 usb-storage. If boot guest with 40 usb-storage that can boot up successfully without any problem, and all the 40 usb-storage disk can be detected in guest correctly.

host info:
# uname -r && rpm -q qemu-kvm
3.10.0-64.el7.x86_64
qemu-kvm-1.5.3-30.el7.x86_64
guest info:
3.10.0-64.el7.x86_64

e.g:
Warning: option deprecated, use lost_tick_policy property of kvm-pit instead.
QEMU 1.5.3 monitor - type 'help' for more information
(qemu) qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: usb hub chain too deep
qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: Device initialization failed.
qemu-kvm: -device usb-storage,drive=drive-usb-0-41,id=usb-0-41,removable=on: Failed to initialize USB device 'usb-hub'
(/usr/libexec/qemu-kvm:24332): SpiceWorker-Warning **: red_worker.c:11464:dev_destroy_primary_surface: double destroy of primary surface
(/usr/libexec/qemu-kvm:24332): SpiceWorker-Warning **: red_worker.c:9650:red_create_surface: condition `surface->context.canvas' reached

(qemu)

Base on above, this issue has been fixed successfully, move to VERIFIED status.

Best Regards,
sluo
Comment 16 Ludek Smid 2014-06-13 11:16:16 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.