Re: [Qemu-devel] [PATCH v1 02/18] block/pcache: empty pcache driver filter

[Kevin Wolf <kwolf@redhat.com>]

Am 24.11.2016 um 16:48 hat Pavel Butsykin geschrieben:
> On 23.11.2016 18:15, Kevin Wolf wrote:
> >Am 15.11.2016 um 07:36 hat Pavel Butsykin geschrieben:
> >>+static QemuOptsList runtime_opts = {
> >>+    .name = "pcache",
> >>+    .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
> >>+    .desc = {
> >>+        {
> >>+            .name = "x-image",
> >>+            .type = QEMU_OPT_STRING,
> >>+            .help = "[internal use only, will be removed]",
> >>+        },
> >
> >blkdebug/blkverify have this because they have to support legacy syntax
> >like -drive file=blkdebug:blkdebug.conf:test.img, i.e. it has to deal
> >with filenames.q
> >
> >Here we don't have to support a legacy syntax, so I would completely
> >avoid this from the beginning. You already support the "image" option,
> >which should be good enough.
> 
> Then the command line would look like this:
> 
> -drive file=/img/harddisk.hdd,if=none,id=drive-scsi0-0-0-0,cache=none,aio=native
> -drive driver=pcache,image=scsi0-0-0-0,if=virtio

Yes, either that or with an inline block node definition, the block
layer supports both:

-drive driver=pcache,image.drive=file,image.filename=/img/harddisk.hdd,if=virtio,cache=none,image.aio=native

Kevin