> -----Original Message-----
> From: linux-yocto@lists.yoctoproject.org <linux-
> yo...@lists.yoctoproject.org> On Behalf Of Paul Gortmaker via
> lists.yoctoproject.org
> Sent: Friday, December 1, 2023 03:08
> To: Bruce Ashfield <bruce.ashfi...@gmail.com>
> Cc: linux-yocto@lists.yoctoproject.org
> Subject: [linux-yocto] [PATCH 4/5] x86-64: use the defaults for number of
> CPUs
>
> From: Paul Gortmaker <paul.gortma...@windriver.com>
>
> The x86-64 BSP isn't quite the same as the "more specific" BSP like a
> Beaglebone Black or the (now deleted) Edgerouter. Where we have exact
> hardware specifics for boards like those, the x86-64 BSP is more of a
> "generic" thing used as the baseline across an endless sea of boards.
>
> To that end, this is somewhat a revert of commit bd77e1f904f6
> ("bsp/intel-x86: change the supported maximum number of CPUs to 512 in 64-
> bit bsp")
>
> It is great that a handful of people out there are using Yocto on these
> huge server machines, but that doesn't reflect 99% of the rest of us who
> continue to lean towards the original "embedded theme" of Yocto.
>
> That means a whole bunch of extra per-CPU jumping through hoops; some can
> be mitigated by booting with "nr_cpus=4" (or whatever the core count
> is) but I guarantee largely nobody out there is doing that.
>
> Let those users with the crazy CPU count own that config customization
> locally. The default is 64 which still seems way too large IMHO, but at
> least we are moving in the right direction.
This intel-x86-64 BSP is a generic one used from mobile to server.
Customers need to customize not only the CPU number config but also other
configs,
like, removing unused drivers or adding debug options.
>From this point of view, there is no difference between 64 or 512.
But it changes the "rule" that intel-x86-64 works for all supported platforms.
We need to do extra work for servers with large CPU number.
Thanks,
Yongxin
>
> Signed-off-by: Paul Gortmaker <paul.gortma...@windriver.com>
> ---
> bsp/intel-x86/intel-x86-64.cfg | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/bsp/intel-x86/intel-x86-64.cfg b/bsp/intel-x86/intel-x86-
> 64.cfg index 58b0fed637e8..da9bc7b57eca 100644
> --- a/bsp/intel-x86/intel-x86-64.cfg
> +++ b/bsp/intel-x86/intel-x86-64.cfg
> @@ -31,6 +31,3 @@ CONFIG_CRYPTO_DEV_QAT_DH895xCCVF=m
>
> # x86 CPU resource control support
> CONFIG_X86_CPU_RESCTRL=y
> -
> -# Processor type and features
> -CONFIG_NR_CPUS=512
> --
> 2.40.0
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