[Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete => Expired
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1882241 Title: file transfer over cifs to 64bit guest corrupts large files Status in QEMU: Expired 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) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1882241/+subscriptions