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...locked memoryBacking [2]. I advocate > for the latter though. Not only it will allocate all the memory at qemu > startup it will also lock it so it won't get swapped off. > > Michal > > 1: http://libvirt.org/drvqemu.html#qemucommand > 2: http://libvirt.org/formatdomain.html#elementsMemoryBacking > I tried memoryBacking: I added this to the domain xml: <memoryBacking> <locked/> </memoryBacking> And got an error when attempting to start the vm: memory locking no supported by QEMU binary. Aside from that I don't really understand how this helps solve my issue...

Hi all, I am running KVM on a 3.18 kernel. The system runs and Atom processor with 2Gb RAM. Using KVM you obviously can over allocate your resources: say you have 4 guests each configured with 1GB ram. Running all four at the same time, depending on the workload, can crash the system - I get a kernel trace when this happens. But let's consider a simpler case: one guest with 1.5 Gb RAM,

...er though. Not only it will allocate all the memory at qemu > >> startup it will also lock it so it won't get swapped off. > >> > >> Michal > >> > >> 1: http://libvirt.org/drvqemu.html#qemucommand > >> 2: http://libvirt.org/formatdomain.html#elementsMemoryBacking > >> > > > > I tried memoryBacking: I added this to the domain xml: > > <memoryBacking> > > <locked/> > > </memoryBacking> > > > > And got an error when attempting to start the vm: memory locking no > > supported by QEM...

...onto qemu commandline [1] or use locked memoryBacking [2]. I advocate for the latter though. Not only it will allocate all the memory at qemu startup it will also lock it so it won't get swapped off. Michal 1: http://libvirt.org/drvqemu.html#qemucommand 2: http://libvirt.org/formatdomain.html#elementsMemoryBacking

...advocate >> for the latter though. Not only it will allocate all the memory at qemu >> startup it will also lock it so it won't get swapped off. >> >> Michal >> >> 1: http://libvirt.org/drvqemu.html#qemucommand >> 2: http://libvirt.org/formatdomain.html#elementsMemoryBacking >> > > I tried memoryBacking: I added this to the domain xml: > <memoryBacking> > <locked/> > </memoryBacking> > > And got an error when attempting to start the vm: memory locking no > supported by QEMU binary. > > Aside from that I don&...