[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [RFC PATCH v3 23/27] qcow2: Add subcluster support to handle_alloc_s
From: |
Max Reitz |
Subject: |
Re: [RFC PATCH v3 23/27] qcow2: Add subcluster support to handle_alloc_space() |
Date: |
Fri, 21 Feb 2020 16:56:11 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 |
On 22.12.19 12:37, Alberto Garcia wrote:
> The bdrv_co_pwrite_zeroes() call here fills complete clusters with
> zeroes, but it can happen that some subclusters are not part of the
> write request or the copy-on-write. This patch makes sure that only
> the affected subclusters are overwritten.
>
> A potential improvement would be to also fill with zeroes the other
> subclusters if we can guarantee that we are not overwriting existing
> data. However this would waste more disk space, so we should first
> evaluate if it's really worth doing.
>
> Signed-off-by: Alberto Garcia <address@hidden>
> ---
> block/qcow2.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
Reviewed-by: Max Reitz <address@hidden>
signature.asc
Description: OpenPGP digital signature
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- Re: [RFC PATCH v3 23/27] qcow2: Add subcluster support to handle_alloc_space(),
Max Reitz <=