linux-kernel - Re: [PATCH v3 05/11] KVM: selftests: Improve error message in vm_phy_pages

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Date:   Tue, 5 Apr 2022 22:29:14 +0000
From:   David Matlack <dmatlack@...gle.com>
To:     Ben Gardon <bgardon@...gle.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        David Dunn <daviddunn@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Junaid Shahid <junaids@...gle.com>
Subject: Re: [PATCH v3 05/11] KVM: selftests: Improve error message in
 vm_phy_pages_alloc

On Wed, Mar 30, 2022 at 10:46:15AM -0700, Ben Gardon wrote:
> Make an error message in vm_phy_pages_alloc more specific, and log the

vm_phy_pages_alloc()

> number of pages requested in the allocation.
> 
> Signed-off-by: Ben Gardon <bgardon@...gle.com>
> ---
>  tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 09742a787546..9d72d1bb34fa 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -2408,9 +2408,10 @@ vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
>  	} while (pg && pg != base + num);
>  
>  	if (pg == 0) {
> -		fprintf(stderr, "No guest physical page available, "
> +		fprintf(stderr,
> +			"Unable to find %ld contiguous guest physical pages. "
>  			"paddr_min: 0x%lx page_size: 0x%x memslot: %u\n",
> -			paddr_min, vm->page_size, memslot);
> +			num, paddr_min, vm->page_size, memslot);
>  		fputs("---- vm dump ----\n", stderr);
>  		vm_dump(stderr, vm, 2);
>  		abort();
> -- 
> 2.35.1.1021.g381101b075-goog
>