Re: [PATCH 10/16] qemu: Generate command line for IOThread pool size

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On Thu, Jun 02, 2022 at 09:18:00 +0200, Michal Privoznik wrote:
> Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
> ---
>  src/qemu/qemu_command.c                       | 15 ++++++-
>  ...othreads-ids-pool-sizes.x86_64-latest.args | 44 +++++++++++++++++++
>  tests/qemuxml2argvtest.c                      |  1 +
>  3 files changed, 59 insertions(+), 1 deletion(-)
>  create mode 100644 tests/qemuxml2argvdata/iothreads-ids-pool-sizes.x86_64-latest.args
> 
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 52e4ef03cd..86b5193651 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -7437,11 +7437,24 @@ qemuBuildIOThreadCommandLine(virCommand *cmd,
>  
>      for (i = 0; i < def->niothreadids; i++) {
>          g_autoptr(virJSONValue) props = NULL;
> -        g_autofree char *alias = g_strdup_printf("iothread%u", def->iothreadids[i]->iothread_id);
> +        const virDomainIOThreadIDDef *iothread = def->iothreadids[i];
> +        g_autofree char *alias = NULL;
> +
> +        alias = g_strdup_printf("iothread%u", iothread->iothread_id);
>  
>          if (qemuMonitorCreateObjectProps(&props, "iothread", alias, NULL) < 0)
>              return -1;

I've sent a patch introducing a 'K' modifier for adding non-negative
longs via the classic machinery:

https://listman.redhat.com/archives/libvir-list/2022-June/232136.html

>  
> +        if (iothread->pool_min >= 0 &&
> +            virJSONValueObjectAppendNumberLong(props, "thread-pool-min",
> +                                               iothread->pool_min) < 0)
> +            return -1;
> +
> +        if (iothread->pool_max >= 0 &&
> +            virJSONValueObjectAppendNumberLong(props, "thread-pool-max",
> +                                               iothread->pool_max) < 0)
> +            return -1;

Please rewrite this as

if (qemuMonitorCreateObjectProps(&props, "iothread", alias,
                                 "K:thread-pool-min", iothread->pool_min,
                                 "K:thread-pool-max", iothread->pool_max,
                                 NULL) < 0)


> +
>          if (qemuBuildObjectCommandlineFromJSON(cmd, props, qemuCaps) < 0)
>              return -1;
>      }

With the above:

Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>




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