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Bug 1823990 - [virtio-win][vioscsi] scsi dvd passthrough slow read on windows guest
Summary: [virtio-win][vioscsi] scsi dvd passthrough slow read on windows guest
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: virtio-win
Version: 9.1
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: rc
: 9.1
Assignee: Vadim Rozenfeld
QA Contact: Peixiu Hou
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-04-15 01:42 UTC by Peixiu Hou
Modified: 2022-06-29 01:37 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-06-28 08:43:24 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Peixiu Hou 2020-04-15 01:42:18 UTC 
Description of problem:
copy an above 800k file takes up to 30 minutes or more depending on the file size, as issue description, 
https://github.com/virtio-win/kvm-guest-drivers-windows/issues/448

Version-Release number of selected component (if applicable):
kernel-4.18.0-193.el8.x86_64
qemu-kvm-2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64
seabios-bin-1.11.1-4.module+el8.1.0+4066+0f1aadab.noarch
virtio-win-prewhql-173/180

How reproducible:
100%

Steps to Reproduce:
1. Boot windows vm with scsi-generic dvd passthrough.
=============================================================================
/usr/libexec/qemu-kvm \
-name vm1 \
-M pc \
-enable-kvm -nodefconfig -nodefaults \
-m 2G \
-smp 2 \
-cpu host \
-uuid ee7aa5a0-43e0-4d11-8dc2-968a3e644147 \
-nodefconfig \
-rtc base=localtime,clock=host,driftfix=slew \
-drive file=win2016-64-virtio-scsi.qcow2,if=none,format=qcow2,cache=none,werror=stop,rerror=stop,id=drive-virtio-disk0,aio=native \
-device virtio-blk-pci,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-device piix3-usb-uhci,id=usb \
-device usb-tablet,id=tablet0 \
-vnc 0.0.0.0:3 \
-vga std \
-k en-us \
-monitor stdio \
-qmp tcp:0:4449,server,nowait \
-boot menu=on \
-netdev tap,script=/etc/qemu-ifup,id=hostnet0 -device e1000,netdev=hostnet0,id=net0,mac=54:a2:87:19:40:31 \
-device usb-ehci,id=ehci0 \
-cdrom /home/kvm_autotest_root/iso/windows/virtio-win-prewhql-0.1-173.iso \
-device virtio-scsi-pci,id=scsi0,bus=pci.0 \
-drive file=/dev/sg2,if=none,media=cdrom,readonly=on,format=raw,id=drive-hostdev0 \
-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-hostdev0,id=hostdev0 \
============================================================================

2. Install vioscsi driver for virtio-scsi-pci device.
3. Copy an above 800K file from cdrom out.  ---issue occur.

Actual results:
slow read

Expected results:
fast read

Additional info:
1. Tested on rhel7.4 host(kernel-3.10.0-693.el7.x86_64) with qemu qemu-kvm-1.5.3-141.el7.x86_64, reproduced this issue.
2. Tested on rhel7.4 host(kernel-3.10.0-693.el7.x86_64) with qemu-kvm-rhev-2.9.0-16.el7_4.3.x86_64, reproduced this issue.
3. Tested with Windows 2016 geust, also reproduced this issue.
4. Tested with rhel8.2.0 guest, cannot reproduce slow read issue, but hit error message when copy a 76M file, errors as follows:
--------------------------------------------------------------------------------
[  140.883275] sr 0:0:0:0: [sr0] tag#105 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s
[  140.883940] sr 0:0:0:0: [sr0] tag#105 Sense Key : Aborted Command [current]
[  140.884420] sr 0:0:0:0: [sr0] tag#105 Add. Sense: I/O process terminated
[  140.884889] sr 0:0:0:0: [sr0] tag#105 CDB: Read(10) 28 00 00 00 00 42 00 00 3e 00
[  140.885384] blk_update_request: I/O error, dev sr0, sector 264 op 0x0:(READ) flags 0x0 phys_seg 31 prio class 0
[  141.053286] sr 0:0:0:0: [sr0] tag#108 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=0s
[  141.053924] sr 0:0:0:0: [sr0] tag#108 Sense Key : Aborted Command [current]
[  141.054945] sr 0:0:0:0: [sr0] tag#108 Add. Sense: I/O process terminated
[  141.055878] sr 0:0:0:0: [sr0] tag#108 CDB: Read(10) 28 00 00 00 00 82 00 00 7e 00
[  141.056818] blk_update_request: I/O error, dev sr0, sector 520 op 0x0:(READ) flags 0x0 phys_seg 63 prio class 0
--------------------------------------------------------------------------------
Comment 5 Peixiu Hou 2021-09-27 07:57:57 UTC 
Hi Vadim,

As this issue is come from custom bz https://github.com/virtio-win/kvm-guest-drivers-windows/issues/448, so could we extend the Stale Date?

Thanks~
Peixiu
Comment 6 Peixiu Hou 2021-11-22 02:05:38 UTC 
Hi Vadim, 

It's close to the Stale Date for this bug, could we extend it?

Thanks~
Peixiu
Comment 7 Vadim Rozenfeld 2021-11-28 10:06:41 UTC 
(In reply to Peixiu Hou from comment #6)
> Hi Vadim, 
> 
> It's close to the Stale Date for this bug, could we extend it?
> 
> Thanks~
> Peixiu

Done,

Best,
Vadim.
Comment 8 Peixiu Hou 2022-02-20 22:24:55 UTC 
Hi Vadim,

Could you help to move this bug to RHEL9.1 Product? thanks~

Best Regards~
Peixiu
Comment 9 Peixiu Hou 2022-02-22 02:35:05 UTC 
Hi Vadim,

Could you help to update the Stale Date? Since this issue change to RHEL9.1 product, maybe it's better follows with RHEL9.1 dev plan~

Thanks~
Peixiu
Comment 10 Vadim Rozenfeld 2022-06-28 08:43:24 UTC 
This bug was created mostly as a reference.
There is no plan to fix this problem in the future releases.
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