On Mon, 26 Oct 2015 21:42:05 +0300 Andrey Korolyov <and...@xdel.ru> wrote:
> > How about following comment: > > /* Linux guests expect 512/64/128Mb alignment for PAE/x32/x64 arch > > * respectively. Windows works fine with 2Mb. To make sure that > > * memory hotplug would work with above flavors of Linux set > > * minimal alignment to 512Mb (i.e. PAE arch). > > * Enforcing minimal alignment bigger than that of a backend > > * (2Mb for memory-backend-ram) changes GPAs of the 2nd and > > * following DIMMs which breaks migration for older machine types, > > * so force minimal alignment only since 2.5 machine type and do not > > * apply it to older machine types (prior 2.5) > > */ > > > > > PAE guests are working with 128Mb alignment just fine, at least > 3.8...3.16 I`ve tried previously, have you seen a counter-example? Issue is seen only during unplug when DIMM is not aligned to SECTION_SIZE_BITS.
