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Re: [Qemu-devel] [PATCH RFC v11 6/6] qcow2: Add falloc and full prealloc


From: Max Reitz
Subject: Re: [Qemu-devel] [PATCH RFC v11 6/6] qcow2: Add falloc and full preallocation option
Date: Thu, 03 Jul 2014 22:35:27 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 02.07.2014 10:17, Hu Tao wrote:
This adds preallocation=falloc and preallocation=full mode to qcow2
image creation.

preallocation=full allocates disk space by writing zeros to disk to
ensure disk space in any cases.

preallocation=falloc likes preallocation=full, but allocates disk space
by posix_fallocate().

Signed-off-by: Hu Tao <address@hidden>
---
  block/qcow2.c              | 29 ++++++++++++++++++++++++-
  tests/qemu-iotests/082.out | 54 +++++++++++++++++++++++-----------------------
  2 files changed, 55 insertions(+), 28 deletions(-)

Ah, I missed something: You'll need to fix the output of test 049 as well ("Invalid preallocation mode: '1234'" -> "invalid parameter value: 1234").

Max



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