From: "Michael S. Tsirkin" <mst@redhat.com> To: Kent Overstreet <koverstreet@google.com> Cc: Rusty Russell <rusty@rustcorp.com.au>, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] virtio-blk: Fix kconfig option Date: Thu, 6 Sep 2012 12:49:56 +0300 [thread overview] Message-ID: <20120906094956.GB22816@redhat.com> (raw) In-Reply-To: <20120906092512.GB5902@koverstreet-glaptop> On Thu, Sep 06, 2012 at 02:25:12AM -0700, Kent Overstreet wrote: > On Thu, Sep 06, 2012 at 11:44:03AM +0300, Michael S. Tsirkin wrote: > > On Thu, Sep 06, 2012 at 12:41:13AM -0700, Kent Overstreet wrote: > > > On Tue, Sep 04, 2012 at 03:53:53PM +0930, Rusty Russell wrote: > > > > Kent Overstreet <koverstreet@google.com> writes: > > > > > > > > > CONFIG_VIRTIO isn't exposed, everything else is supposed to select it > > > > > instead. > > > > > > > > This is a slight mis-understanding. It's supposed to be selected by > > > > the particular driver, probably virtio_pci in your case. > > > > > > So are you saying virtio-blk depends on virtio-pci? If so, the kconfig > > > should have that. > > > > > > As is, VIRTIO_BLK just has: > > > depends on EXPERIMENTAL && VIRTIO > > > > > > which is flat out broken. > > > > I don't think anything is broken. > > Can you show an example of a broken configuration? > > Do you not understand the difference between depends an selects? > Or did you not read my original mail? > Flip off everything in drivers -> virtio > > Now go to drivers -> block and try to turn on virtio-blk. > > It's not listed! Yes. Because you disabled all virtio backends. It does not make sense to have any frontends. > Now go back to drivers -> virtio and turn on (randomly) balloon. > > Go back to drivers -> block, and now you can turn on virtio-blk! > > Do you see what's wrong with this picture? Yes. You got unlucky with your random guess. It's a bug in balloon kconfig: it should not select virtio. I sent a patch to fix that yesterday. -- MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com> To: Kent Overstreet <koverstreet@google.com> Cc: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH] virtio-blk: Fix kconfig option Date: Thu, 6 Sep 2012 12:49:56 +0300 [thread overview] Message-ID: <20120906094956.GB22816@redhat.com> (raw) In-Reply-To: <20120906092512.GB5902@koverstreet-glaptop> On Thu, Sep 06, 2012 at 02:25:12AM -0700, Kent Overstreet wrote: > On Thu, Sep 06, 2012 at 11:44:03AM +0300, Michael S. Tsirkin wrote: > > On Thu, Sep 06, 2012 at 12:41:13AM -0700, Kent Overstreet wrote: > > > On Tue, Sep 04, 2012 at 03:53:53PM +0930, Rusty Russell wrote: > > > > Kent Overstreet <koverstreet@google.com> writes: > > > > > > > > > CONFIG_VIRTIO isn't exposed, everything else is supposed to select it > > > > > instead. > > > > > > > > This is a slight mis-understanding. It's supposed to be selected by > > > > the particular driver, probably virtio_pci in your case. > > > > > > So are you saying virtio-blk depends on virtio-pci? If so, the kconfig > > > should have that. > > > > > > As is, VIRTIO_BLK just has: > > > depends on EXPERIMENTAL && VIRTIO > > > > > > which is flat out broken. > > > > I don't think anything is broken. > > Can you show an example of a broken configuration? > > Do you not understand the difference between depends an selects? > Or did you not read my original mail? > Flip off everything in drivers -> virtio > > Now go to drivers -> block and try to turn on virtio-blk. > > It's not listed! Yes. Because you disabled all virtio backends. It does not make sense to have any frontends. > Now go back to drivers -> virtio and turn on (randomly) balloon. > > Go back to drivers -> block, and now you can turn on virtio-blk! > > Do you see what's wrong with this picture? Yes. You got unlucky with your random guess. It's a bug in balloon kconfig: it should not select virtio. I sent a patch to fix that yesterday. -- MST
next prev parent reply other threads:[~2012-09-06 9:48 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-09-03 4:41 [PATCH] virtio-blk: Fix kconfig option Kent Overstreet 2012-09-03 4:46 ` Kent Overstreet 2012-09-03 4:46 ` Kent Overstreet 2012-09-04 6:23 ` Rusty Russell 2012-09-04 6:23 ` Rusty Russell 2012-09-04 23:12 ` Kent Overstreet 2012-09-04 23:12 ` Kent Overstreet 2012-09-05 4:22 ` Asias He 2012-09-05 4:22 ` Asias He 2012-09-05 5:48 ` Michael S. Tsirkin 2012-09-05 5:48 ` Michael S. Tsirkin 2012-09-05 5:54 ` Asias He 2012-09-05 5:54 ` Asias He 2012-09-05 6:04 ` Michael S. Tsirkin 2012-09-05 6:04 ` Michael S. Tsirkin 2012-09-05 6:12 ` Michael S. Tsirkin 2012-09-05 6:12 ` Michael S. Tsirkin 2012-09-06 1:46 ` Rusty Russell 2012-09-06 1:46 ` Rusty Russell 2012-09-06 7:41 ` Kent Overstreet 2012-09-06 7:41 ` Kent Overstreet 2012-09-06 8:44 ` Michael S. Tsirkin 2012-09-06 8:44 ` Michael S. Tsirkin 2012-09-06 9:25 ` Kent Overstreet 2012-09-06 9:25 ` Kent Overstreet 2012-09-06 9:49 ` Michael S. Tsirkin [this message] 2012-09-06 9:49 ` Michael S. Tsirkin 2012-09-06 10:02 ` Kent Overstreet 2012-09-06 10:02 ` Kent Overstreet 2012-09-06 10:18 ` Michael S. Tsirkin 2012-09-06 10:18 ` Michael S. Tsirkin 2012-09-06 10:31 ` Kent Overstreet 2012-09-06 10:31 ` Kent Overstreet 2012-09-06 11:09 ` Michael S. Tsirkin 2012-09-06 11:09 ` Michael S. Tsirkin 2012-09-06 23:40 ` Rusty Russell 2012-09-06 23:40 ` Rusty Russell 2012-09-07 0:25 ` Kent Overstreet 2012-09-07 0:25 ` Kent Overstreet 2012-09-07 2:57 ` Rusty Russell 2012-09-07 2:57 ` Rusty Russell 2012-09-03 4:41 Kent Overstreet
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