Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-25 Thread Kevin Wolf
Am 25.11.2010 06:22, schrieb ronnie sahlberg: > Nicholas, > below. > > On Thu, Nov 25, 2010 at 3:32 PM, Nicholas A. Bellinger > wrote: > >> But existing code aside, I think having a small userspace iSCSI >> initiator built into QEMU that 'just works' across all host environments >> would be a pr

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-24 Thread ronnie sahlberg
Nicholas, below. On Thu, Nov 25, 2010 at 3:32 PM, Nicholas A. Bellinger wrote: > But existing code aside, I think having a small userspace iSCSI > initiator built into QEMU that 'just works' across all host environments > would be a pretty useful thing, even if the scalibility / scope is > limit

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-24 Thread Nicholas A. Bellinger
On Wed, 2010-11-24 at 19:14 +, Stefan Hajnoczi wrote: > On Wed, Nov 24, 2010 at 5:04 PM, Christoph Hellwig wrote: > > Do you have any performance numbers showing why the addition of the > > code is nessecary over just using the kernel iscsi initiator? Which > > btw, is a lot more flexible as

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-24 Thread Stefan Hajnoczi
On Wed, Nov 24, 2010 at 5:04 PM, Christoph Hellwig wrote: > Do you have any performance numbers showing why the addition of the > code is nessecary over just using the kernel iscsi initiator?  Which > btw, is a lot more flexible as it also supports SG_IO passthrough > and thus accessing other devi

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-24 Thread Christoph Hellwig
I don't really see the point of this. It's implemented as a protocol, and thus the bottom of the qemu protocol stack. So we might get SCSI commands in from the guest, decode them, just to re-encode them again and send them off to the network all inside qemu. Do you have any performance numbers s

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-21 Thread ronnie sahlberg
On Mon, Nov 22, 2010 at 10:13 AM, FUJITA Tomonori wrote: > On Mon, 22 Nov 2010 09:17:50 +1100 > ronnie sahlberg wrote: > >> This patch adds support for attaching directorly to iSCSI resources, >> both DISK/SBC and CDROM/MMC, without the need to make the devices >> visible to the host. > > This ad

Re: [Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-21 Thread FUJITA Tomonori
On Mon, 22 Nov 2010 09:17:50 +1100 ronnie sahlberg wrote: > This patch adds support for attaching directorly to iSCSI resources, > both DISK/SBC and CDROM/MMC, without the need to make the devices > visible to the host. This adds the iscsi initiator feature to qemu (as you did to dbench), right?

[Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

2010-11-21 Thread ronnie sahlberg
List, Please find attached a gzipped patch against master that adds support of iSCSI. It is sent in gz format because of its uncompressed size, >100kb. This patch adds support for attaching directorly to iSCSI resources, both DISK/SBC and CDROM/MMC, without the need to make the devices visible t