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Re: [Qemu-block] [Qemu-devel] [qcow2] how to avoid qemu doing lseek(SEEK

From: Stephane Chazelas
Subject: Re: [Qemu-block] [Qemu-devel] [qcow2] how to avoid qemu doing lseek(SEEK_DATA/SEEK_HOLE)?
Date: Wed, 8 Feb 2017 14:20:51 +0000
User-agent: Mutt/1.5.24 (2015-08-30)

2017-02-08 00:43:18 +0100, Max Reitz:
> Therefore, the patch as it is makes sense. The fact that said lseek() is
> slow on ZFS is (in my humble opinion) the ZFS driver's problem that
> needs to be fixed there.

For the record, I've mentioned the qemu performance implication at

Not much more I can do at that point.

That issue was raised a year ago and has not been assigned any
milestone yet.


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