Re: [Qemu-devel] [PATCH v2] pc: memhp: enforce minimal 128Mb alignment for pc-dimm

[Andrey Korolyov]

> 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?