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Subject: Re: [PATCH] kvm tools, qcow: Add the support for copy-on-write clusters
On Mon, Nov 21, 2011 at 9:12 AM, Lan Tianyu wrote:
> +/*Allocate clusters according to the size. Find a postion that
> + *can satisfy the size. free_clust_idx is initialized to ze
On Mon, Nov 21, 2011 at 9:12 AM, Lan Tianyu wrote:
> +/*Allocate clusters according to the size. Find a postion that
> + *can satisfy the size. free_clust_idx is initialized to zero and
> + *Record last position.
> +*/
Can you please fix up your comments to use the following standard kernel style
Am 21.11.2011 08:12, schrieb Lan Tianyu:
> When meeting request to write the cluster without copied flag,
> allocate a new cluster and write original data with modification
> to the new cluster. This also adds support for the writing operation
> of the qcow2 compressed image. After testing, image f
Am 20.11.2011 11:59, schrieb Pekka Enberg:
> On Sun, 2011-11-20 at 14:14 +0800, Lan, Tianyu wrote:
>>> OK. Thx.
>>> But fsync is too slow. I try to find a way to sync a range of file.
>>> Are there any solutions to meet my purpose?
>
> On Sun, 2011-11-20 at 08:23 +0200, Sasha Levin wrote:
>> fdat
When meeting request to write the cluster without copied flag,
allocate a new cluster and write original data with modification
to the new cluster. This also adds support for the writing operation
of the qcow2 compressed image. After testing, image file can pass
through "qemu-img check". The perfor
On Sun, 2011-11-20 at 14:14 +0800, Lan, Tianyu wrote:
> > OK. Thx.
> > But fsync is too slow. I try to find a way to sync a range of file.
> > Are there any solutions to meet my purpose?
On Sun, 2011-11-20 at 08:23 +0200, Sasha Levin wrote:
> fdatasync() is as good as it'll get.
>
> tbh, maybe w
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Subject: RE: [RFC v2 PATCH] kvm tools, qcow: Add the support for copy-on-write
clusters
On Sun, 2011-11-20 at 14:14 +0800, Lan, Tianyu wrote:
> OK. Thx.
> But fsync is too slow. I try to find a way to sync a range of file.
> Are there any solutions t
he...@gmail.com; prasadjoshi...@gmail.com
> Subject: RE: [RFC v2 PATCH] kvm tools, qcow: Add the support for
> copy-on-write clusters
>
> On Sat, 2011-11-19 at 23:30 +0800, Lan, Tianyu wrote:
> > How about using the sync_file_range to sync the metadata?
>
> sync
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Subject: RE: [RFC v2 PATCH] kvm tools, qcow: Add the support for copy-on-write
clusters
On Sat, 2011-11-19 at 23:30 +0800, Lan, Tianyu wrote:
> How about using the sync_file_range to sync the metad
On Sat, 2011-11-19 at 23:30 +0800, Lan, Tianyu wrote:
> How about using the sync_file_range to sync the metadata?
sync_file_range() is only a hint, it doesn't actually assure anything.
--
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Subject: RE: [RFC v2 PATCH] kvm tools, qcow: Add the support for copy-on-write
clusters
Hi Kevin:
Thanks for your review. The following means that there should be a
fsync after updating
metadata(refcunt block, l1 table and l2
Hi Kevin:
Thanks for your review. The following means that there should be a
fsync after updating
metadata(refcunt block, l1 table and l2 table).
Thanks
Tianyu Lan
-Original Message-
> + /*write l2 table*/
> + l2t->dirty = 1;
> + if (qcow_l2_
Am 18.11.2011 09:47, schrieb Lan Tianyu:
> When meeting request to write the cluster without copied flag,
> allocate a new cluster and write original data with modification
> to the new cluster. This also adds support for the writing operation
> of the qcow2 compressed image. After testing, image f
When meeting request to write the cluster without copied flag,
allocate a new cluster and write original data with modification
to the new cluster. This also adds support for the writing operation
of the qcow2 compressed image. After testing, image file can pass
through "qemu-img check".
Please e
Hi,
(I'm Cc'ing Prasad too.)
On Thu, Nov 17, 2011 at 9:50 AM, Lan Tianyu wrote:
> When meeting request to write the cluster without copied flag,
> allocate a new cluster and write original data with modification
> to the new cluster. This also can add support for the writing
> operation of the q
When meeting request to write the cluster without copied flag,
allocate a new cluster and write original data with modification
to the new cluster. This also can add support for the writing
operation of the qcow2 compressed image.
Signed-off-by: Lan Tianyu
---
tools/kvm/disk/qcow.c| 322
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