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Re: [Qemu-devel] [RFC 3/7] docs: add lazy refcounts bit to qcow2 specifi
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [RFC 3/7] docs: add lazy refcounts bit to qcow2 specification |
Date: |
Mon, 25 Jun 2012 16:35:34 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 |
Am 22.06.2012 17:08, schrieb Stefan Hajnoczi:
> The lazy refcounts bit indicates that this image can take advantage of
> the dirty bit and that refcount updates can be postponed.
>
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> ---
> docs/specs/qcow2.txt | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/docs/specs/qcow2.txt b/docs/specs/qcow2.txt
> index 3a789ce..8b2c0eb 100644
> --- a/docs/specs/qcow2.txt
> +++ b/docs/specs/qcow2.txt
> @@ -85,7 +85,11 @@ in the description of a field.
> Bitmask of compatible features. An implementation can
> safely ignore any unknown bits that are set.
>
> - Bits 0-63: Reserved (set to 0)
> + Bit 0: Lazy refcounts bit. If this bit is set then lazy
> + refcount updates can be used. This means
> postponing
> + marking the image file dirty and postponing
> refcount
> + metadata updates.
> + Bits 1-63: Reserved (set to 0)
Please keep the formatting consistent: The description for bit 0 should
be indented to the same level as "Reserved", and an empty line should be
left between each description.
Regarding indentation, the same applies to patch 1.
Kevin
- [Qemu-devel] [RFC 2/7] qcow2: introduce dirty bit, (continued)
- [Qemu-devel] [RFC 2/7] qcow2: introduce dirty bit, Stefan Hajnoczi, 2012/06/22
- [Qemu-devel] [RFC 1/7] docs: add dirty bit to qcow2 specification, Stefan Hajnoczi, 2012/06/22
- [Qemu-devel] [RFC 4/7] qemu-iotests: ignore qemu-img create lazy_refcounts output, Stefan Hajnoczi, 2012/06/22
- [Qemu-devel] [RFC 7/7] qemu-iotests: add 039 qcow2 lazy refcounts test, Stefan Hajnoczi, 2012/06/22
- [Qemu-devel] [RFC 6/7] qemu-io: add "abort" command to simulate program crash, Stefan Hajnoczi, 2012/06/22
- [Qemu-devel] [RFC 3/7] docs: add lazy refcounts bit to qcow2 specification, Stefan Hajnoczi, 2012/06/22
- Re: [Qemu-devel] [RFC 3/7] docs: add lazy refcounts bit to qcow2 specification,
Kevin Wolf <=
- Re: [Qemu-devel] [RFC 0/7] qcow2: implement lazy refcounts optimization, Zhi Yong Wu, 2012/06/25