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It's a simple patch: commit 0c14fb47ece5ef42d7a0a4b3e8e43e022b375720 Author: Bharata B Rao <bharata.ibm.com> Date: Tue Jul 16 21:47:42 2013 +0530 gluster: Add discard support for GlusterFS block driver. Implement bdrv_aio_discard for gluster. Signed-off-by: Bharata B Rao <bharata.ibm.com> Reviewed-by: Kevin Wolf <kwolf> Signed-off-by: Stefan Hajnoczi <stefanha>
Fix included in qemu-kvm-1.5.3-41.el7
Reproduce this issue on qemu-kvm-1.5.3-38.el7 and verify this issue on qemu-kvm-1.5.3-41.el7 with the instruction of comment #2. ###########Reproduced Steps and Results: host info: 3.10.0-76.el7.x86_64 qemu-kvm-1.5.3-38.el7.x86_64 seabios-1.7.2.2-10.el7.x86_64 seabios-bin-1.7.2.2-10.el7.x86_64 guest info: 3.10.0-76.el7.x86_64 host ]# modprobe scsi_debug lbpu=1 lbpws=1 lbprz=0 host ]# lsscsi [0:0:0:0] disk ATA ST3500413AS HP64 /dev/sda [2:0:0:0] cd/dvd hp DVD-RAM GH80N RF01 /dev/sr0 [34:0:0:0] disk Linux scsi_debug 0004 /dev/sdb qemu-kvm command line: #/usr/libexec/qemu-kvm...-drive file=/dev/sdb,if=none,id=drive-data-disk,format=raw,cache=none,aio=native,werror=stop,rerror=stop,discard=on -device virtio-scsi-pci,id=scsi1,bus=pcie.0,addr=0x7 -device scsi-hd,drive=drive-data-disk,id=data-disk,bus=scsi1.0 guest ]# lsscsi [6:0:0:0] disk QEMU QEMU HARDDISK 1.5. /dev/sda [7:0:0:0] disk QEMU QEMU HARDDISK 1.5. /dev/sdb guest ]# cat /sys/bus/scsi/devices/target7\:0\:0/7\:0\:0\:0/scsi_disk/7\:0\:0\:0/provisioning_mode writesame_16 <----------------------- ###########Verified Steps and Results: host info: 3.10.0-76.el7.x86_64 qemu-kvm-1.5.3-41.el7.x86_64 seabios-1.7.2.2-10.el7.x86_64 seabios-bin-1.7.2.2-10.el7.x86_64 guest info: 3.10.0-76.el7.x86_64 host ]# modprobe scsi_debug lbpu=1 lbpws=1 lbprz=0 host ]# lsscsi [0:0:0:0] disk ATA ST3500413AS HP64 /dev/sda [2:0:0:0] cd/dvd hp DVD-RAM GH80N RF01 /dev/sr0 [34:0:0:0] disk Linux scsi_debug 0004 /dev/sdb qemu-kvm command line: #/usr/libexec/qemu-kvm...-drive file=/dev/sdb,if=none,id=drive-data-disk,format=raw,cache=none,aio=native,werror=stop,rerror=stop,discard=on -device virtio-scsi-pci,id=scsi1,bus=pcie.0,addr=0x7 -device scsi-hd,drive=drive-data-disk,id=data-disk,bus=scsi1.0 guest ]# lsscsi [6:0:0:0] disk QEMU QEMU HARDDISK 1.5. /dev/sda [7:0:0:0] disk QEMU QEMU HARDDISK 1.5. /dev/sdb guest ]# cat /sys/bus/scsi/devices/target7\:0\:0/7\:0\:0\:0/scsi_disk/7\:0\:0\:0/provisioning_mode unmap <----------------------- Base on above, this issue has been fixed correctly. Best Regards, sluo
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.