Re: [PATCH 2/4] spapr: Use error_append_hint() in spapr_reallocate_hpt()

[David Gibson]

On Mon, Oct 26, 2020 at 01:40:40PM +0100, Greg Kurz wrote:
> Hints should be added with the dedicated error_append_hint() API
> because we don't want to print them when using QMP. This requires
> to insert ERRP_GUARD as explained in "qapi/error.h".
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>

Applied to ppc-for-5.2.

> ---
>  hw/ppc/spapr.c |    8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index f098d0ee6d98..f51b663f7dcb 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -1486,6 +1486,7 @@ void spapr_free_hpt(SpaprMachineState *spapr)
>  void spapr_reallocate_hpt(SpaprMachineState *spapr, int shift,
>                            Error **errp)
>  {
> +    ERRP_GUARD();
>      long rc;
>  
>      /* Clean up any HPT info from a previous boot */
> @@ -1500,17 +1501,18 @@ void spapr_reallocate_hpt(SpaprMachineState *spapr, 
> int shift,
>  
>      if (rc < 0) {
>          /* kernel-side HPT needed, but couldn't allocate one */
> -        error_setg_errno(errp, errno,
> -                         "Failed to allocate KVM HPT of order %d (try 
> smaller maxmem?)",
> +        error_setg_errno(errp, errno, "Failed to allocate KVM HPT of order 
> %d",
>                           shift);
> +        error_append_hint(errp, "Try smaller maxmem?\n");
>          /* This is almost certainly fatal, but if the caller really
>           * wants to carry on with shift == 0, it's welcome to try */
>      } else if (rc > 0) {
>          /* kernel-side HPT allocated */
>          if (rc != shift) {
>              error_setg(errp,
> -                       "Requested order %d HPT, but kernel allocated order 
> %ld (try smaller maxmem?)",
> +                       "Requested order %d HPT, but kernel allocated order 
> %ld",
>                         shift, rc);
> +            error_append_hint(errp, "Try smaller maxmem?\n");
>          }
>  
>          spapr->htab_shift = shift;
> 
> 

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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