Re: [Xen-devel] [PATCH Remus v2 01/10] tools/libxc: adjust the memory allocation for migration

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 08/05/15 10:33, Yang Hongyang wrote:
> @@ -475,24 +475,12 @@ static int update_progress_string(struct xc_sr_context 
> *ctx,
>  static int send_domain_memory_live(struct xc_sr_context *ctx)
>  {
>      xc_interface *xch = ctx->xch;
> -    DECLARE_HYPERCALL_BUFFER(unsigned long, to_send);
>      xc_shadow_op_stats_t stats = { 0, ctx->save.p2m_size };
>      char *progress_str = NULL;
>      unsigned x;
>      int rc = -1;
> -
> -    to_send = xc_hypercall_buffer_alloc_pages(
> -        xch, to_send, NRPAGES(bitmap_size(ctx->save.p2m_size)));
> -
> -    ctx->save.batch_pfns = malloc(MAX_BATCH_SIZE *
> -                                  sizeof(*ctx->save.batch_pfns));
> -    ctx->save.deferred_pages = calloc(1, bitmap_size(ctx->save.p2m_size));
> -
> -    if ( !ctx->save.batch_pfns || !to_send || !ctx->save.deferred_pages )
> -    {
> -        ERROR("Unable to allocate memory for to_{send,fix}/batch bitmaps");
> -        goto out;
> -    }
> +    DECLARE_HYPERCALL_BUFFER_SHADOW(unsigned long, dirty_bitmap,
> +                                    (&ctx->save.dirty_bitmap_hbuf));

Nice bug.  I have just put a fix to DECLARE_HYPERCALL_BUFFER_SHADOW() in
my series.

~Andrew


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