** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1523246
Title:
Virtio-blk does not support TRIM
Status in QEMU:
Fix Released
Bug d
The DISCARD feature has now been implemented in QEMU, too:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=37b06f8d46fe602e630e4
** Changed in: qemu
Status: Confirmed => Fix Committed
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While the Linux virtio-blk guest driver now supports discard and write
zeroes, QEMU's virtio-blk device emulation does not support it yet.
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Title:
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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Latest effort was one month ago:
https://patchwork.kernel.org/patch/9645537/
2017-04-19 14:08 GMT+02:00 Mike Mol :
> discard support for virtio-blk is on the QEMU TODO list:
>
> http://wiki.qemu-project.org/ToDo/Block#virtio-
> blk_discard_support_.5BPeter_Lieven.5D
>
> --
> You received this bug
discard support for virtio-blk is on the QEMU TODO list:
http://wiki.qemu-project.org/ToDo/Block#virtio-
blk_discard_support_.5BPeter_Lieven.5D
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> Virtio will never support discard requests.
Why? If you don't want to write a treatise on the subject, perhaps point
at an LWN article or LKML thread where that conclusion was discussed or
reached.
> So, please rename bug to "Feature request: Refuse to operate if virtio
+ discard is requested"
Granted, it's been there since October of 2014. http://wiki.qemu-
project.org/index.php?title=ToDo/Block&oldid=4410#virtio-
blk_discard_support_.5BPeter_Lieven.5D
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> Virtio will never support discard requests.
- what is that?
> Please use virtio-scsi.
- in some tests, SCSI emulation appears 7 times slower than the
paravirtualized bus.
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