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[Qemu-devel] Question about IDE TRIM Command
From: |
kazushi takahashi |
Subject: |
[Qemu-devel] Question about IDE TRIM Command |
Date: |
Thu, 2 Feb 2012 20:55:18 +0900 |
Hi all
I have a question about IDE TRIM Command.
As you know, QEMU have supported TRIM command since QEMU 0.15.0.
Some QEMU disk images such as qcow2 support bdrv_discard function
which will be called when guest OS executes ATA TRIM command.
So, I think qcow2 image has a function to delete the disk pages which are
recognized as discarded by guest OS.
I think that to enable TRIM Command, we have to emulate guest HDD as
Solid State Drive. However, it seems QEMU does not emulate guest
HDD as Solid State Drive. Thus, I think that bdrv_discard functions in
qemu images are never called by guest OS.
Is my thinking correct?
Thanks,
Kazushi Takahashi
- [Qemu-devel] Question about IDE TRIM Command,
kazushi takahashi <=