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[Qemu-devel] [Bug 1523246] Re: Virtio-blk does not support TRIM
From: |
James Harvey |
Subject: |
[Qemu-devel] [Bug 1523246] Re: Virtio-blk does not support TRIM |
Date: |
Sat, 12 Jan 2019 03:12:54 -0000 |
I believe this feature was just merged by Linus about a week ago, and is
in linux 5.0-rc1:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d548e65904ae43b0637d200a2441fc94e0589c30
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https://bugs.launchpad.net/bugs/1523246
Title:
Virtio-blk does not support TRIM
Status in QEMU:
Confirmed
Bug description:
When model=virtio is used, TRIM is not supported.
# mount -o discard /dev/vda4 /mnt
# mount | tail -1
/dev/vda4 on /mnt type fuseblk
(rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
# fstrim /mnt/
fstrim: /mnt/: the discard operation is not supported
Booting without model=virtio allows using TRIM (in Windows as well).
Full QEMU line:
qemu-system-x86_64 -enable-kvm -cpu host -bios
/usr/share/ovmf/ovmf_x64.bin -smp 2 -m 7G -vga qxl -usbdevice tablet
-net nic,model=virtio -net user -drive discard=unmap,detect-
zeroes=unmap,cache=none,file=vms/win10.hd.img.vmdk,format=vmdk,if=virtio
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- [Qemu-devel] [Bug 1523246] Re: Virtio-blk does not support TRIM,
James Harvey <=