Hello, I think this might have been discussed numerous times on this mailing-list, if there is a relevant post I can refer to please point that to me. What I am trying to do is set up a shared memory/event-channels between dom0 and domU''s via socket calls because I cannot use existing front-end/back-end driver mechanism since it relies on devices aka vif, vbd type of device to be created and uses xenbus/xenstored for communication between domains. Adding support for new device similar to vif/vbd may require xapi changes as well which I would like to avoid. Instead write own socket library calls aka bind/connect and use them to setup shared memory and event channels between domains. I haven''t sketched out details yet, but thought of checking if this would be feasible. Thanks -Ravi _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Forgot to mention an additional option. In addition to sockets, I was thinking to use block-devices i.e create /dev/<block-device> in both dom0 and domU''s and use these to communicate between domains... Your inputs will be highly appreciated. -Ravi On Tue, Feb 8, 2011 at 1:34 PM, ravi kerur <rkerur@gmail.com> wrote:> Hello, > > I think this might have been discussed numerous times on this mailing-list, > if there is a relevant post I can refer to please point that to me. What I > am trying to do is set up a shared memory/event-channels between dom0 and > domU''s via socket calls because I cannot use existing front-end/back-end > driver mechanism since it relies on devices aka vif, vbd type of device to > be created and uses xenbus/xenstored for communication between domains. > Adding support for new device similar to vif/vbd may require xapi changes as > well which I would like to avoid. Instead write own socket library calls aka > bind/connect and use them to setup shared memory and event channels between > domains. I haven''t sketched out details yet, but thought of checking if this > would be feasible. > > Thanks > -Ravi >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Feb-08 21:57 UTC
Re: [Xen-devel] Q on shared_mem and event_channel
On Tue, Feb 08, 2011 at 01:34:48PM -0800, ravi kerur wrote:> Hello, > > I think this might have been discussed numerous times on this mailing-list, > if there is a relevant post I can refer to please point that to me. What I > am trying to do is set up a shared memory/event-channels between dom0 and > domU''s via socket calls because I cannot use existing front-end/back-end > driver mechanism since it relies on devices aka vif, vbd type of device to > be created and uses xenbus/xenstored for communication between domains. > Adding support for new device similar to vif/vbd may require xapi changes as > well which I would like to avoid. Instead write own socket library calls aka > bind/connect and use them to setup shared memory and event channels between > domains. I haven''t sketched out details yet, but thought of checking if this > would be feasible.Like this: http://www.gossamer-threads.com/lists/xen/devel/197987 ? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Thanks Konrad, couple of q''s 1. will this work with xenserver 5.6.0(citrix)? reason being, it uses /dev/xen/gntalloc and /dev/xen/gtndev and I don''t see these devices in xenserver 5.6.0 dom0 and I don''t see similar devices in xenserver 5.6.0 2. I might be able to use this functionality in conjunction with socket calls, do you see any reason not to do it? Basically in my case I want to have shared_mem/evt_chn setup either during bootup of dom0/domU''s or when my application is started. Thanks -Ravi On Tue, Feb 8, 2011 at 1:57 PM, Konrad Rzeszutek Wilk < konrad.wilk@oracle.com> wrote:> On Tue, Feb 08, 2011 at 01:34:48PM -0800, ravi kerur wrote: > > Hello, > > > > I think this might have been discussed numerous times on this > mailing-list, > > if there is a relevant post I can refer to please point that to me. What > I > > am trying to do is set up a shared memory/event-channels between dom0 and > > domU''s via socket calls because I cannot use existing front-end/back-end > > driver mechanism since it relies on devices aka vif, vbd type of device > to > > be created and uses xenbus/xenstored for communication between domains. > > Adding support for new device similar to vif/vbd may require xapi changes > as > > well which I would like to avoid. Instead write own socket library calls > aka > > bind/connect and use them to setup shared memory and event channels > between > > domains. I haven''t sketched out details yet, but thought of checking if > this > > would be feasible. > > Like this: > http://www.gossamer-threads.com/lists/xen/devel/197987 > ? >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2011-Feb-08 23:12 UTC
Re: [Xen-devel] Q on shared_mem and event_channel
On Tue, Feb 08, 2011 at 03:05:31PM -0800, ravi kerur wrote:> Thanks Konrad, couple of q''s > > 1. will this work with xenserver 5.6.0(citrix)? reason being, it uses > /dev/xen/gntalloc and /dev/xen/gtndev and I don''t see these devices in > xenserver 5.6.0 dom0 and I don''t see similar devices in xenserver 5.6.0You will have to back-port them to it.> > 2. I might be able to use this functionality in conjunction with socket > calls, do you see any reason not to do it? Basically in my case I want to > have shared_mem/evt_chn setup either during bootup of dom0/domU''s or when my > application is started.Well, that requires much more than the patches I mentioned. I think Citrix might have some off-the-shelf code that does it. Ask on the Xapi mailing list. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Hi Konrad, xapi mailing list response time is pretty slow(I had experienced it before), haven''t heard from xapi mailing list for my Q yet. If i go to Citrix support it takes at least a week to get a response. I am not quite sure whom to followup with. Any inputs appreciated. Thanks -Ravi On Tue, Feb 8, 2011 at 4:07 PM, ravi kerur <rkerur@gmail.com> wrote:> Thanks Konrad, is xapi mailing list xen-api@lists.xensource.com ? > > > On Tue, Feb 8, 2011 at 3:12 PM, Konrad Rzeszutek Wilk < > konrad.wilk@oracle.com> wrote: > >> On Tue, Feb 08, 2011 at 03:05:31PM -0800, ravi kerur wrote: >> > Thanks Konrad, couple of q''s >> > >> > 1. will this work with xenserver 5.6.0(citrix)? reason being, it uses >> > /dev/xen/gntalloc and /dev/xen/gtndev and I don''t see these devices in >> > xenserver 5.6.0 dom0 and I don''t see similar devices in xenserver 5.6.0 >> >> You will have to back-port them to it. >> > >> > 2. I might be able to use this functionality in conjunction with socket >> > calls, do you see any reason not to do it? Basically in my case I want >> to >> > have shared_mem/evt_chn setup either during bootup of dom0/domU''s or >> when my >> > application is started. >> >> Well, that requires much more than the patches I mentioned. I think Citrix >> might have some off-the-shelf code that does it. Ask on the Xapi mailing >> list. >> >> >> >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
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