Re: [Xen-devel] [PATCH 06 of 10 v2] libxl: allow for explicitly specifying node-affinity

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 19/12/12 19:07, Dario Faggioli wrote:
> By introducing a nodemap in libxl_domain_build_info and
> providing the get/set methods to deal with it.
>
> Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
> Acked-by: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
I think you'll probably need to add a line like the following:

#define LIBXL_HAVE_NODEAFFINITY 1

So that people wanting to build against different versions of the 
library can behave appropriately.  But IanC or IanJ would be the final 
word on that, I think.
 -George

> diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
> --- a/tools/libxl/libxl.c
> +++ b/tools/libxl/libxl.c
> @@ -4142,6 +4142,26 @@ int libxl_set_vcpuaffinity_all(libxl_ctx
>       return rc;
>   }
>   
> +int libxl_domain_set_nodeaffinity(libxl_ctx *ctx, uint32_t domid,
> +                                  libxl_bitmap *nodemap)
> +{
> +    if (xc_domain_node_setaffinity(ctx->xch, domid, nodemap->map)) {
> +        LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "setting node affinity");
> +        return ERROR_FAIL;
> +    }
> +    return 0;
> +}
> +
> +int libxl_domain_get_nodeaffinity(libxl_ctx *ctx, uint32_t domid,
> +                                  libxl_bitmap *nodemap)
> +{
> +    if (xc_domain_node_getaffinity(ctx->xch, domid, nodemap->map)) {
> +        LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "getting node affinity");
> +        return ERROR_FAIL;
> +    }
> +    return 0;
> +}
> +
>   int libxl_set_vcpuonline(libxl_ctx *ctx, uint32_t domid, libxl_bitmap *cpumap)
>   {
>       GC_INIT(ctx);
> diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
> --- a/tools/libxl/libxl.h
> +++ b/tools/libxl/libxl.h
> @@ -861,6 +861,10 @@ int libxl_set_vcpuaffinity(libxl_ctx *ct
>                              libxl_bitmap *cpumap);
>   int libxl_set_vcpuaffinity_all(libxl_ctx *ctx, uint32_t domid,
>                                  unsigned int max_vcpus, libxl_bitmap *cpumap);
> +int libxl_domain_set_nodeaffinity(libxl_ctx *ctx, uint32_t domid,
> +                                  libxl_bitmap *nodemap);
> +int libxl_domain_get_nodeaffinity(libxl_ctx *ctx, uint32_t domid,
> +                                  libxl_bitmap *nodemap);
>   int libxl_set_vcpuonline(libxl_ctx *ctx, uint32_t domid, libxl_bitmap 
> *cpumap);
>   
>   libxl_scheduler libxl_get_scheduler(libxl_ctx *ctx);
> diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
> --- a/tools/libxl/libxl_create.c
> +++ b/tools/libxl/libxl_create.c
> @@ -184,6 +184,12 @@ int libxl__domain_build_info_setdefault(
>   
>       libxl_defbool_setdefault(&b_info->numa_placement, true);
>   
> +    if (!b_info->nodemap.size) {
> +        if (libxl_node_bitmap_alloc(CTX, &b_info->nodemap, 0))
> +            return ERROR_FAIL;
> +        libxl_bitmap_set_any(&b_info->nodemap);
> +    }
> +
>       if (b_info->max_memkb == LIBXL_MEMKB_DEFAULT)
>           b_info->max_memkb = 32 * 1024;
>       if (b_info->target_memkb == LIBXL_MEMKB_DEFAULT)
> diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
> --- a/tools/libxl/libxl_dom.c
> +++ b/tools/libxl/libxl_dom.c
> @@ -230,6 +230,7 @@ int libxl__build_pre(libxl__gc *gc, uint
>           if (rc)
>               return rc;
>       }
> +    libxl_domain_set_nodeaffinity(ctx, domid, &info->nodemap);
>       libxl_set_vcpuaffinity_all(ctx, domid, info->max_vcpus, &info->cpumap);
>   
>       xc_domain_setmaxmem(ctx->xch, domid, info->target_memkb + LIBXL_MAXMEM_CONSTANT);
> diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
> --- a/tools/libxl/libxl_types.idl
> +++ b/tools/libxl/libxl_types.idl
> @@ -261,6 +261,7 @@ libxl_domain_build_info = Struct("domain
>       ("max_vcpus",       integer),
>       ("avail_vcpus",     libxl_bitmap),
>       ("cpumap",          libxl_bitmap),
> +    ("nodemap",         libxl_bitmap),
>       ("numa_placement",  libxl_defbool),
>       ("tsc_mode",        libxl_tsc_mode),
>       ("max_memkb",       MemKB),

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