Bug 1003291
Summary: | Backport cachemode patch to RHEL 7 | ||
---|---|---|---|
Product: | Red Hat Enterprise Linux 7 | Reporter: | Richard W.M. Jones <rjones> |
Component: | libguestfs | Assignee: | Richard W.M. Jones <rjones> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | Virtualization Bugs <virt-bugs> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 7.0 | CC: | acathrow, bfan, leiwang, lkong, mbooth, wshi |
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | libguestfs-1.22.6-8.el7 | Doc Type: | Bug Fix |
Doc Text: | Story Points: | --- | |
Clone Of: | 994517 | Environment: | |
Last Closed: | 2014-06-13 13:17:20 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: | |||
Bug Depends On: | 994517, 1003685 | ||
Bug Blocks: |
Description
Richard W.M. Jones
2013-09-01 17:58:23 UTC
The suggested way to test this patch would be to run guestfish as follows: $ truncate -s1G /tmp/test.img $ guestfish ><fs> add /tmp/test.img ><fs> run In another window, look at the qemu command line. For guestfish < 1.22.6-6 you would see either: $ ps ax | grep 'file=' [...] -drive file=/tmp/test.img,[...],cache=none or: -drive file=/tmp/test.img,[...] (no cache= parameter at all). Which you see would depend on whether /tmp uses tmpfs or not. For guestfish >= 1.22.6-6 you should see: -drive file=/tmp/test.img,[...],cache=writeback Also try: $ guestfish ><fs> add /tmp/test.img cachemode:unsafe ><fs> run which should translate into: -drive file=/tmp/test.img,[...],cache=unsafe Also try: $ guestfish ><fs> add /tmp/test.img cachemode:writeback ><fs> run which should translate into: -drive file=/tmp/test.img,[...],cache=writeback Also try: $ guestfish ><fs> add-drive-scratch 1G ><fs> run which should translate into: -drive file=[temporary_name],[...],cache=unsafe Note that libguestfs only supports cache modes "unsafe" and "writeback". qemu supports a lot more modes, but they are not relevant to libguestfs (except they should give an error if you try to use them). Also your tests should run much more quickly, especially if you use 'add-drive-scratch' instead of 'add' to add scratch/testing/temporary drives (ie. drives where you don't care about the data in the event of sudden power failure). Moving back to ASSIGNED, waiting for libvirt bug 1003685 to be fixed. Steps to reproduce: 1. #truncate -s1G /tmp/test.img #guestfish ><fs> add /tmp/test.img ><fs> run In another window, look at the qemu command line: [host]#ps ax | grep 'file=' 2819 pts/0 Sl 0:02 /usr/libexec/qemu-kvm -global virtio-blk-pci.scsi=off -nodefconfig -nodefaults -nographic -machine accel=kvm:tcg -cpu host,+kvmclock -m 500 -no-reboot -kernel /var/tmp/.guestfs-0/kernel.2781 -initrd /var/tmp/.guestfs-0/initrd.2781 -device virtio-scsi-pci,id=scsi -drive file=/tmp/test.img,cache=none,id=hd0,if=none -device scsi-hd,drive=hd0 -drive file=/var/tmp/.guestfs-0/root.2781,snapshot=on,id=appliance,if=none,cache=unsafe -device scsi-hd,drive=appliance -device virtio-serial -serial stdio -device sga -chardev socket,path=/tmp/libguestfsRwKJa3/guestfsd.sock,id=channel0 -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 -append panic=1 console=ttyS0 udevtimeout=600 no_timer_check acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0 TERM=xterm 2832 pts/1 S+ 0:00 grep file= ===> cache=none 2. $ guestfish ><fs> add /tmp/test.img cachemode:unsafe add: unknown optional argument "cachemode:unsafe" ><fs> add /tmp/test.img cachemode:writeback add: unknown optional argument "cachemode:writeback" ><fs> ===> unknow optional argument 3. $ guestfish ><fs> add-drive-scratch 1G add-drive-scratch: unknown command ><fs> ===>unknow command Sorry, Just ignore Comment 5, I reproduce it with a wrong libguestfs version. Here I reproduce it with libguestfs-1.22.6-4.el7 Steps to reproduce: 1. #truncate -s1G /tmp/test.img #guestfish ><fs> add /tmp/test.img ><fs> run # ps ax | grep 'file=' 3700 ? Sl 0:03 /usr/libexec/qemu-kvm -name guestfs-tnlgedhcldk9lev5 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Opteron_G2,+3dnowprefetch,+cr8legacy,+extapic,+cmp_legacy,+3dnow,+3dnowext,+fxsr_opt,+mmxext,+ht,+vme -m 500 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 5ac33e52-b34d-4ec0-953a-e88c5f886f6f -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/guestfs-tnlgedhcldk9lev5.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-reboot -no-acpi -kernel /var/tmp/.guestfs-0/kernel.3626 -initrd /var/tmp/.guestfs-0/initrd.3626 -append panic=1 console=ttyS0 udevtimeout=600 no_timer_check acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0 TERM=xterm -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive file=/tmp/test.img,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 -drive file=/tmp/libguestfsEzHcCk/snapshot1,if=none,id=drive-scsi0-0-1-0,format=qcow2,cache=unsafe -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=1,lun=0,drive=drive-scsi0-0-1-0,id=scsi0-0-1-0 -chardev socket,id=charserial0,path=/tmp/libguestfsEzHcCk/console.sock -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/tmp/libguestfsEzHcCk/guestfsd.sock -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.libguestfs.channel.0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 ===> -drive file=/tmp/test.img,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none 2. # guestfish ><fs> add /tmp/test.img cachemode:unsafe add: unknown optional argument "cachemode:unsafe" ><fs> add /tmp/test.img cachemode:writeback add: unknown optional argument "cachemode:writeback" ===> unknown optional argument cachemode:unsafe & cachemode:writeback 3. #guestfish ><fs> add-drive-scratch 1G ><fs> run # ps ax | grep 'file=' 4282 ? Sl 0:04 /usr/libexec/qemu-kvm -name guestfs-ukgewoabfadacucb -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Opteron_G2,+3dnowprefetch,+cr8legacy,+extapic,+cmp_legacy,+3dnow,+3dnowext,+fxsr_opt,+mmxext,+ht,+vme -m 500 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid ab4b0acd-41d2-4cfd-80c0-1f37f0c7909a -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/guestfs-ukgewoabfadacucb.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-reboot -no-acpi -kernel /var/tmp/.guestfs-0/kernel.4249 -initrd /var/tmp/.guestfs-0/initrd.4249 -append panic=1 console=ttyS0 udevtimeout=600 no_timer_check acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0 TERM=xterm -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive file=/tmp/libguestfs1nlMcA/scratch.1,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 -drive file=/tmp/libguestfs1nlMcA/snapshot2,if=none,id=drive-scsi0-0-1-0,format=qcow2,cache=unsafe -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=1,lun=0,drive=drive-scsi0-0-1-0,id=scsi0-0-1-0 -chardev socket,id=charserial0,path=/tmp/libguestfs1nlMcA/console.sock -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/tmp/libguestfs1nlMcA/guestfsd.sock -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.libguestfs.channel.0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 ===> -drive file=/tmp/libguestfs1nlMcA/scratch.1,if=none,id=drive-scsi0-0-0-0,format=raw,cache=none Verified with Steps to verify 1. #truncate -s1G /tmp/test.img #guestfish ><fs> add /tmp/test.img ><fs> run # ps ax | grep 'file=' ... -drive file=/tmp/test.img,if=none,id=drive-scsi0-0-0-0,format=raw,cache=writeback ... 2. ><fs> add /tmp/test.img cachemode:unsafe ><fs> run #ps ax | grep 'file= .... -drive file=/tmp/test.img,if=none,id=drive-scsi0-0-0-0,format=raw,cache=unsafe ... 3. ><fs> add /tmp/test.img cachemode:writeback ><fs> run #ps ax | grep 'file= ... -drive file=/tmp/test.img,if=none,id=drive-scsi0-0-0-0,format=raw,cache=writeback .... 4. ><fs> add-drive-scratch 1G ><fs> run #ps ax | grep 'file= ... -drive file=/tmp/libguestfsmI0cRv/scratch.1,if=none,id=drive-scsi0-0-0-0,format=raw,cache=unsafe .... Summary: All have the correct cache mode I verified with libguestfs-1.22.6-15.el7 in Comment #7 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. |