Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-12 Thread David Vrabel
On 11/07/13 16:48, Roger Pau Monné wrote: > On 11/07/13 17:26, David Vrabel wrote: >> On 11/07/13 16:12, Roger Pau Monné wrote: >>> On 11/07/13 15:48, David Vrabel wrote: It also seems odd to have the backend decide how much frontend resource can be consumed at anyone time. It's not

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-12 Thread David Vrabel
On 11/07/13 16:48, Roger Pau Monné wrote: On 11/07/13 17:26, David Vrabel wrote: On 11/07/13 16:12, Roger Pau Monné wrote: On 11/07/13 15:48, David Vrabel wrote: It also seems odd to have the backend decide how much frontend resource can be consumed at anyone time. It's not clear how the

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread Roger Pau Monné
On 11/07/13 17:26, David Vrabel wrote: > On 11/07/13 16:12, Roger Pau Monné wrote: >> On 11/07/13 15:48, David Vrabel wrote: >>> On 10/07/13 10:19, Roger Pau Monné wrote: >From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Wed,

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread David Vrabel
On 11/07/13 16:12, Roger Pau Monné wrote: > On 11/07/13 15:48, David Vrabel wrote: >> On 10/07/13 10:19, Roger Pau Monné wrote: >>> >>> >From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 >>> From: Roger Pau Monne >>> Date: Wed, 10 Jul 2013 10:22:19 +0200 >>> Subject: [PATCH

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread Roger Pau Monné
On 11/07/13 15:48, David Vrabel wrote: > On 10/07/13 10:19, Roger Pau Monné wrote: >> >> >From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 >> From: Roger Pau Monne >> Date: Wed, 10 Jul 2013 10:22:19 +0200 >> Subject: [PATCH RFC] xen-blkfront: revoke foreign access for grants

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread David Vrabel
On 10/07/13 10:19, Roger Pau Monné wrote: > >>From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 > From: Roger Pau Monne > Date: Wed, 10 Jul 2013 10:22:19 +0200 > Subject: [PATCH RFC] xen-blkfront: revoke foreign access for grants not > mapped by the backend > MIME-Version:

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread David Vrabel
On 10/07/13 10:19, Roger Pau Monné wrote: From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne roger@citrix.com Date: Wed, 10 Jul 2013 10:22:19 +0200 Subject: [PATCH RFC] xen-blkfront: revoke foreign access for grants not mapped by the backend

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread Roger Pau Monné
On 11/07/13 15:48, David Vrabel wrote: On 10/07/13 10:19, Roger Pau Monné wrote: From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne roger@citrix.com Date: Wed, 10 Jul 2013 10:22:19 +0200 Subject: [PATCH RFC] xen-blkfront: revoke foreign access

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread David Vrabel
On 11/07/13 16:12, Roger Pau Monné wrote: On 11/07/13 15:48, David Vrabel wrote: On 10/07/13 10:19, Roger Pau Monné wrote: From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne roger@citrix.com Date: Wed, 10 Jul 2013 10:22:19 +0200 Subject: [PATCH

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-11 Thread Roger Pau Monné
On 11/07/13 17:26, David Vrabel wrote: On 11/07/13 16:12, Roger Pau Monné wrote: On 11/07/13 15:48, David Vrabel wrote: On 10/07/13 10:19, Roger Pau Monné wrote: From 1ede72ba10a7ec13d57ba6d2af54e86a099d7125 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne roger@citrix.com Date: Wed, 10

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-10 Thread Roger Pau Monné
On 10/07/13 15:54, Egger, Christoph wrote: > On 10.07.13 11:19, Roger Pau Monné wrote: >> On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: >>> On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: Right now blkfront has no way to unmap grant refs, if using persistent grants

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-10 Thread Egger, Christoph
On 10.07.13 11:19, Roger Pau Monné wrote: > On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: >> On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: >>> Right now blkfront has no way to unmap grant refs, if using persistent >>> grants once a grant is used blkfront cannot assure if

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-10 Thread Egger, Christoph
On 10.07.13 11:19, Roger Pau Monné wrote: On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: Right now blkfront has no way to unmap grant refs, if using persistent grants once a grant is used blkfront cannot assure if blkback will

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-10 Thread Roger Pau Monné
On 10/07/13 15:54, Egger, Christoph wrote: On 10.07.13 11:19, Roger Pau Monné wrote: On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: Right now blkfront has no way to unmap grant refs, if using persistent grants once a grant is

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-09 Thread Wei Liu
On Tue, Jul 09, 2013 at 02:32:07PM -0400, Konrad Rzeszutek Wilk wrote: > On Tue, Jul 09, 2013 at 06:37:58PM +0200, Roger Pau Monné wrote: > > On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: > > > On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: > > >> Right now blkfront has no way

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-09 Thread Wei Liu
On Mon, Jul 08, 2013 at 03:41:52PM -0400, Konrad Rzeszutek Wilk wrote: > On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: > > Right now blkfront has no way to unmap grant refs, if using persistent > > grants once a grant is used blkfront cannot assure if blkback will > > have this

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-09 Thread Wei Liu
On Mon, Jul 08, 2013 at 03:41:52PM -0400, Konrad Rzeszutek Wilk wrote: On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: Right now blkfront has no way to unmap grant refs, if using persistent grants once a grant is used blkfront cannot assure if blkback will have this grant

Re: [Xen-devel] [PATCH RFC 4/4] xen-block: introduce a new request type to unmap grants

2013-07-09 Thread Wei Liu
On Tue, Jul 09, 2013 at 02:32:07PM -0400, Konrad Rzeszutek Wilk wrote: On Tue, Jul 09, 2013 at 06:37:58PM +0200, Roger Pau Monné wrote: On 08/07/13 21:41, Konrad Rzeszutek Wilk wrote: On Mon, Jul 08, 2013 at 03:03:27PM +0200, Roger Pau Monne wrote: Right now blkfront has no way to unmap