ACK/Cmnt: [SRU][K/Unstable][PATCH 0/1] Support up to 32 CPUs on riscv64

[Tim Gardner]

On 8/31/22 06:24, Emil Renner Berthing wrote:
> [Impact]
> 
>   * Currently our riscv64 kernels don't support more than 8 CPUs.
> 
>   * The QEMU 7.0 virt machine supports up to 512 virtual CPUs.
> 
>   * Raising CONFIG_NR_CPUS to the maximum of 32 allows us to use
>     more of them.
> 
> [Test Plan]
> 
>   * Run riscv64 Ubuntu in a QEMU virt instance with more than 8
>     virtual CPUs and see that only 8 of them are used.
> 
>   * After raising CONFIG_NR_CPUS up to 32 of them should be used.
> 
> [Where problems could occur]
> 
>   * This will allocate slightly more RAM which might hurt very small
>     machines.
> 
> Emil Renner Berthing (1):
>    UBUNTU: [Config] Raise riscv64 CONFIG_NR_CPUS to 32
> 
>   debian.master/config/annotations                   | 2 +-
>   debian.master/config/riscv64/config.common.riscv64 | 2 +-
>   2 files changed, 2 insertions(+), 2 deletions(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>

Have you profiled memory usage to see how much more 512 would use ?

-- 
-----------
Tim Gardner
Canonical, Inc