Thanks, Berto!
On 8/16/19 3:17 PM, Alberto Garcia wrote:
> The size of the qcow2 L2 cache defaults to 32 MB, which can be easily
> larger than the maximum amount of L2 metadata that the image can have.
> For example: with 64 KB clusters the user would need a qcow2 image
> with a virtual size of 25
On Fri 16 Aug 2019 04:08:19 PM CEST, Kevin Wolf wrote:
>> And yes, the odd value on the 512KB row on that we discussed last month
>> is due to this same bug:
>>
>> https://lists.gnu.org/archive/html/qemu-block/2019-07/msg00496.html
>
> Hm... And suddently it makes sense. :-)
>
> So I assume all of
Am 16.08.2019 um 15:30 hat Alberto Garcia geschrieben:
> On Fri 16 Aug 2019 02:59:21 PM CEST, Kevin Wolf wrote:
> > The requirement so that this bug doesn't affect the user seems to be
> > that the image size is a multiple of 64k * 8k = 512 MB. Which means
> > that users are probably often lucky en
On Fri 16 Aug 2019 02:59:21 PM CEST, Kevin Wolf wrote:
> The requirement so that this bug doesn't affect the user seems to be
> that the image size is a multiple of 64k * 8k = 512 MB. Which means
> that users are probably often lucky enough in practice.
Or rather: cluster_size^2 / 8, which, if my
Am 16.08.2019 um 14:17 hat Alberto Garcia geschrieben:
> The size of the qcow2 L2 cache defaults to 32 MB, which can be easily
> larger than the maximum amount of L2 metadata that the image can have.
> For example: with 64 KB clusters the user would need a qcow2 image
> with a virtual size of 256 G
Cc qemu-stable
This bug means that under certain conditions it's impossible to
create a cache large enough for the image, resulting in reduced I/O
performance.
On Fri, Aug 16, 2019 at 03:17:42PM +0300, Alberto Garcia wrote:
> The size of the qcow2 L2 cache defaults to 32 MB, which can be easily
>
The size of the qcow2 L2 cache defaults to 32 MB, which can be easily
larger than the maximum amount of L2 metadata that the image can have.
For example: with 64 KB clusters the user would need a qcow2 image
with a virtual size of 256 GB in order to have 32 MB of L2 metadata.
Because of that, sinc
