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[Bug 1882241] [NEW] file transfer over cifs to 64bit guest corrupts larg
From: |
timsoft |
Subject: |
[Bug 1882241] [NEW] file transfer over cifs to 64bit guest corrupts large files |
Date: |
Fri, 05 Jun 2020 12:30:39 -0000 |
Public bug reported:
qemu 4.0 compiled fom source.
vm called by
qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive
file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom
/mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net
nic,macaddr=02:00:00:11:11:17,model=i82551 -net bridge,br=br0 -enable-kvm -k
en-gb -display vnc=:3 -monitor telnet:localhost:7103,server,nowait,nodelay
copying large files eg 2.4gb or reading them on a cifs mount in the guest
causes corruption every time. For smaller files 40-60mb corruption is more than
50% of the time. tested by md5sum on cifs server, or on host machine vs. on
guest vm.
corruption is seen only with 64bit guest using cifs with i82551 emulated
network device
ie. 32bit guest using cifs with i82551 emulated network device gives no
corruption.
changing the emulated device to vmxnet3 removes the data corruption (see
below)
qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive
file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom
/mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net
nic,macaddr=02:00:00:11:11:17,model=vmxnet3 -net bridge,br=br0 -enable-
kvm -k en-gb -display vnc=:3 -monitor
telnet:localhost:7103,server,nowait,nodelay
this corruption is repeatable. ie. I created new vm, call using top example,
installed 64bit linux, mounted cifs share and copied 2.4gb file to /tmp then
run md5sum "filecopied"
the md5sum is different every time. copy same file to the host, or to a 32bit
guest with the same virtual network device and bridge and md5sums are correct.
The host pysical network adapter is
lspci|grep Ether
1e:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411
PCI Express Gigabit Ethernet Controller (rev 11)
physically connected via gigabit ethernet to cifs server (via gigabit
switch)
** Affects: qemu
Importance: Undecided
Status: New
** Tags: i82551
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https://bugs.launchpad.net/bugs/1882241
Title:
file transfer over cifs to 64bit guest corrupts large files
Status in QEMU:
New
Bug description:
qemu 4.0 compiled fom source.
vm called by
qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive
file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom
/mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net
nic,macaddr=02:00:00:11:11:17,model=i82551 -net bridge,br=br0 -enable-kvm -k
en-gb -display vnc=:3 -monitor telnet:localhost:7103,server,nowait,nodelay
copying large files eg 2.4gb or reading them on a cifs mount in the guest
causes corruption every time. For smaller files 40-60mb corruption is more than
50% of the time. tested by md5sum on cifs server, or on host machine vs. on
guest vm.
corruption is seen only with 64bit guest using cifs with i82551 emulated
network device
ie. 32bit guest using cifs with i82551 emulated network device gives no
corruption.
changing the emulated device to vmxnet3 removes the data corruption
(see below)
qemu-system-x86_64 -cpu qemu64 -smp 4 -m 4G -drive
file=/data/images/slack14.2_64bit_test.qcow2,format=qcow2 -cdrom
/mnt/smb1/slackware/iso/slackware64-14.2-install-dvd.iso -boot c -net
nic,macaddr=02:00:00:11:11:17,model=vmxnet3 -net bridge,br=br0
-enable-kvm -k en-gb -display vnc=:3 -monitor
telnet:localhost:7103,server,nowait,nodelay
this corruption is repeatable. ie. I created new vm, call using top example,
installed 64bit linux, mounted cifs share and copied 2.4gb file to /tmp then
run md5sum "filecopied"
the md5sum is different every time. copy same file to the host, or to a 32bit
guest with the same virtual network device and bridge and md5sums are correct.
The host pysical network adapter is
lspci|grep Ether
1e:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 11)
physically connected via gigabit ethernet to cifs server (via gigabit
switch)
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- [Bug 1882241] [NEW] file transfer over cifs to 64bit guest corrupts large files,
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