Messages in this thread | | | Subject | Re: [PATCH 1/1] powerpc/kernel: Enables memory hot-remove after reboot on pseries guests | From | Leonardo Bras <> | Date | Wed, 04 Mar 2020 04:18:32 -0300 |
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Hello Bharata, thanks for this feedback!
On Wed, 2020-03-04 at 10:13 +0530, Bharata B Rao wrote: > Hi, > > I tried this a few years back > (https://patchwork.ozlabs.org/patch/800142/) and didn't pursue it > further because at that time, it was felt that the approach might not > work for PowerVM guests, because all the present memory except RMA > gets marked as hot-pluggable by PowerVM. This discussion is not > present in the above thread, but during my private discussions with > Reza and Nathan, it was noted that making all that memory as MOVABLE > is not preferable for PowerVM guests as we might run out of memory for > kernel allocations.
Humm, this makes sense. But with mu change, these pieces of memory only get into ZONE_MOVABLE if the boot parameter 'movable_node' gets passed to guest kernel.
So, even if we are unable to sort out some flag combination that work fine for both use-cases, if PowerVM don't pass 'movable_node' as boot parameter to kernel, it will behave just as today.
What are your thoughts on that?
Best regards,
Leonardo Bras [unhandled content-type:application/pgp-signature] | |