Am 30.09.2015 um 17:11 hat Jeff Cody geschrieben:
> On Mon, Sep 28, 2015 at 04:23:16PM +0100, Stefan Hajnoczi wrote:
> > On Sun, Sep 27, 2015 at 11:29:18PM -0400, Jeff Cody wrote:
> > > +if (s->zero_cycle) {
> > > +ret = bdrv_get_block_status(s->target, sector_num, nb_sectors,
> > >
On Mon, Sep 28, 2015 at 04:23:16PM +0100, Stefan Hajnoczi wrote:
> On Sun, Sep 27, 2015 at 11:29:18PM -0400, Jeff Cody wrote:
> > +if (s->zero_cycle) {
> > +ret = bdrv_get_block_status(s->target, sector_num, nb_sectors,
> > );
> > +if (!(ret & BDRV_BLOCK_ZERO)) {
> > +
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
On 29/09/2015 10:39, Kevin Wolf wrote:
> bdrv_has_zero_init() takes care of that, in theory. The "problem"
> here is that the target is opened with BDRV_O_NO_BACKING, so the
> block layer doesn't consider this an image with a backing file.
I
Am 28.09.2015 um 19:32 hat Max Reitz geschrieben:
> On 28.09.2015 05:29, Jeff Cody wrote:
> > During mirror, if the target device does not have support zero
> > initialization, a mirror may result in a corrupt image.
> >
> > For instance, on mirror to a host device with format = raw, whatever
> >
On 28/09/2015 05:29, Jeff Cody wrote:
> This only occurs under two conditions:
>
> 1. 'mode' != "existing"
> 2. bdrv_has_zero_init(target) == NULL
>
I'm not sure if mode != "existing" actually matters. I think what
actually matters is sync == "full".
The reasons are:
1) with sync
Am 28.09.2015 um 05:29 hat Jeff Cody geschrieben:
> During mirror, if the target device does not have support zero
> initialization, a mirror may result in a corrupt image.
I think you want to check this sentence. ("During mirror [...], a
mirror may result [...]")
> For instance, on mirror to a
Am 28.09.2015 um 05:29 hat Jeff Cody geschrieben:
> During mirror, if the target device does not have support zero
> initialization, a mirror may result in a corrupt image.
>
> For instance, on mirror to a host device with format = raw, whatever
> random data is on the target device will still be
On Sun, Sep 27, 2015 at 11:29:18PM -0400, Jeff Cody wrote:
> +if (s->zero_cycle) {
> +ret = bdrv_get_block_status(s->target, sector_num, nb_sectors,
> );
> +if (!(ret & BDRV_BLOCK_ZERO)) {
> +bdrv_aio_write_zeroes(s->target, sector_num, op->nb_sectors,
> +
On 28.09.2015 05:29, Jeff Cody wrote:
> During mirror, if the target device does not have support zero
> initialization, a mirror may result in a corrupt image.
>
> For instance, on mirror to a host device with format = raw, whatever
> random data is on the target device will still be there for
During mirror, if the target device does not have support zero
initialization, a mirror may result in a corrupt image.
For instance, on mirror to a host device with format = raw, whatever
random data is on the target device will still be there for unallocated
sectors.
This is because during the
10 matches
Mail list logo
