Re: [Qemu-devel] [PATCH 2/2] migration/postcopy: do_fixup is true when host_offset is non-zero

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Wei Yang (richardw.yang@linux.intel.com) wrote:
> This means it is not necessary to spare an extra variable to hold this
> condition. Use host_offset directly is fine.
> 
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  migration/ram.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/migration/ram.c b/migration/ram.c
> index c4dc36e525..b0ca0059c4 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -2873,7 +2873,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
>      }
>  
>      while (run_start < pages) {
> -        bool do_fixup = false;
>          unsigned long fixup_start_addr;
>          unsigned long host_offset;
>  
> @@ -2883,7 +2882,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
>           */
>          host_offset = run_start % host_ratio;
>          if (host_offset) {
> -            do_fixup = true;
>              fixup_start_addr = run_start - host_offset;
>              /*
>               * This host page has gone, the next loop iteration starts
> @@ -2905,7 +2903,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
>               */
>              host_offset = run_end % host_ratio;
>              if (host_offset) {
> -                do_fixup = true;
>                  fixup_start_addr = run_end - host_offset;
>                  /*
>                   * This host page has gone, the next loop iteration starts
> @@ -2921,7 +2918,7 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
>              }
>          }
>  
> -        if (do_fixup) {
> +        if (host_offset) {
>              unsigned long page;
>  
>              /* Tell the destination to discard this page */
> -- 
> 2.17.1
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK