linux-kernel - Re: arch/x86/kvm/hyperv.c failing to compile: frame size of 1048 bytes is larger than 1024 bytes

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Date:   Fri, 26 Mar 2021 19:25:27 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Logan Devine <bbhclinux@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: arch/x86/kvm/hyperv.c failing to compile: frame size of 1048
 bytes is larger than 1024 bytes

On 3/26/21 7:18 PM, Logan Devine wrote:
> Compiling the kernel for the second time, and now kvm/hyperv.c is failing to build:
> 
> 
>   AR      kernel/built-in.a
>   CC [M]  arch/x86/kvm/ioapic.o
>   CC [M]  arch/x86/kvm/irq_comm.o
>   CC [M]  arch/x86/kvm/cpuid.o
>   CC [M]  arch/x86/kvm/pmu.o
>   CC [M]  arch/x86/kvm/mtrr.o
>   CC [M]  arch/x86/kvm/hyperv.o
>   CC [M]  arch/x86/kvm/debugfs.o
>   CC [M]  arch/x86/kvm/mmu/mmu.o
>   CC [M]  arch/x86/kvm/mmu/page_track.o
> arch/x86/kvm/hyperv.c: In function ‘kvm_hv_send_ipi.isra’:
> arch/x86/kvm/hyperv.c:1799:1: error: the frame size of 1048 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
>  1799 | }
>       | ^
>   CC [M]  arch/x86/kvm/mmu/spte.o
>   CC [M]  arch/x86/kvm/mmu/tdp_iter.o
>   CC [M]  arch/x86/kvm/mmu/tdp_mmu.o
> cc1: all warnings being treated as errors
> make[2]: *** [scripts/Makefile.build:271: arch/x86/kvm/hyperv.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
> make[1]: *** [scripts/Makefile.build:514: arch/x86/kvm] Error 2
> make: *** [Makefile:1851: arch/x86] Error 2
>   CC [M]  kernel/kheaders.o
> 
> 
> (Sorry if I did this wrong, it's my first time on the list.)
> 
> 
> I'm on gregkh/staging branch staging-testing.


Hi,
Just edit the kernel .config file and change
CONFIG_FRAME_WARN=1024
to
CONFIG_FRAME_WARN=2048

and it will be good.

-- 
~Randy