----- Original Message ----- From: "Francesco Cipollone" <[EMAIL PROTECTED]> To: "Izik Eidus" <[EMAIL PROTECTED]> Sent: Thursday, October 25, 2007 10:43 PM Subject: Re: [kvm-devel] somthing new for shared memory???
> > ----- Original Message ----- > From: "Izik Eidus" <[EMAIL PROTECTED]> > To: "Francesco Cipollone" <[EMAIL PROTECTED]> > Sent: Thursday, October 25, 2007 11:25 PM > Subject: Re: [kvm-devel] somthing new for shared memory??? > > >> Francesco Cipollone wrote: >>> can you gently explain more about the second option >>> >>> ----- Original Message ----- From: "Izik Eidus" <[EMAIL PROTECTED]> >>> To: "Francesco Cipollone" <[EMAIL PROTECTED]> >>> Cc: <kvm-devel@lists.sourceforge.net> >>> Sent: Thursday, October 25, 2007 11:03 PM >>> Subject: Re: [kvm-devel] somthing new for shared memory??? >>> >>> >>>> Francesco Cipollone wrote: >>>>> Hy >>>>> somthing new about the shared memory support between VMs? or VM and >>>>> host? >>>>> bye >>>>> >>>> beside moving the memory allocation to userspace (this is first step in >>>> share memory between VMs using smart file system) >>>> there is not much advance. >>>> >>>> about sharing memory between VM and host, we improved it by adding >>>> partial swapping support, >>>> so the host can take memory from the guest in demand. >>> >>> can you gently explain to me more abouth this option? >>> thank you very much >>> Francesco >> >> this option (guest swapping) run by default, it have two good effect: >> 1.part of the unused memory of the guest can be swapped (the kernel treat >> this area of memory as of normal process memory and swap it >> on deamed) it allow you to allocate VMs with more ram than you have on >> host. >> 2.memory is allocated on deamed, this make VM load faster and dont steal >> memory that it dont touch >> >> about the "partial swapping" to make it short: >> there is as for now (we will fix this) amount of memory that is mapped >> inside kvm that cant be swapped, >> it is hard to tell how much would it be, but from tests that i made i saw >> that most of times (infact i never saw case when this is not true) guests >> give up about 90%+ of their ram when the host asked for. > > So if i want to share a part of memory (for example i allocate it in > kernel-space, in guest, with a module) > and tell the host an address, can this one see it? > I want to make a sort of sharing memory between host and guest, an > unidirection channel,with a signal channel or somthing like that > to wake up the host when there is somthing new to read in the shared > memory. > I want to do somthing like this becouse this application is almost > invisible... > is for a security application > can you help me do that? > I don't undestand if i can share a part of the phisical memory of the > guest with the host. > > thanks > Francesco > >> >> >>> >>>>> ------------------------------------------------------------------------ >>>>> >>>>> >>>>> ------------------------------------------------------------------------- >>>>> >>>>> This SF.net email is sponsored by: Splunk Inc. >>>>> Still grepping through log files to find problems? Stop. >>>>> Now Search log events and configuration files using AJAX and a >>>>> browser. >>>>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>>>> ------------------------------------------------------------------------ >>>>> >>>>> >>>>> _______________________________________________ >>>>> kvm-devel mailing list >>>>> kvm-devel@lists.sourceforge.net >>>>> https://lists.sourceforge.net/lists/listinfo/kvm-devel >>>>> >>>> >>> >> > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
