Re: [Qemu-devel] [PATCH v15 8/9] Add set_cachesize command

[Eric Blake]

On 07/05/2012 06:51 AM, Orit Wasserman wrote:
> Change XBZRLE cache size in bytes (the size should be a power of 2).
> If XBZRLE cache size is too small there will be many cache miss.
> 
> Signed-off-by: Benoit Hudzia <address@hidden>
> Signed-off-by: Petter Svard <address@hidden>
> Signed-off-by: Aidan Shribman <address@hidden>
> Signed-off-by: Orit Wasserman <address@hidden>
> ---

> +    {
> +        .name       = "migrate_set_cachesize",
> +        .args_type  = "value:o",
> +        .params     = "value",
> +        .help       = "set cache size (in bytes) for XBZRLE migrations,"
> +                   "the cache size will be rounded down to the nearest "
> +                      "power of 2.\n"
> +                   "The cache size effects the number of cache misses."
> +                   "In case of a high cache miss ratio you need to increase 
> the cache size",

Inconsistent indentation.  Kill those TABs.

> +++ b/migration.c
> @@ -22,6 +22,7 @@
>  #include "qemu_socket.h"
>  #include "block-migration.h"
>  #include "qmp-commands.h"
> +#include <math.h>

Urgh.  You STILL haven't killed this bogus include, even though I've
been mentioning it since my v12 review.  I'm really getting frustrated
with how long this series is being dragged out.

>  
>  //#define DEBUG_MIGRATION
>  
> @@ -43,7 +44,7 @@ enum {
>  
>  #define MAX_THROTTLE  (32 << 20)      /* Migration speed throttling */
>  
> -/* Migration XBZRLE cache size */
> +/* Migration XBZRLE default cache size */

Again from my v12 review, this hunk should be squashed into the patch
that first introduces the comment.

> +migrate_set_cachesize
> +---------------------
> +
> +Set cache size to be used by XBZRLE migration, the cache size will be round 
> down
> +to the nearset power of 2

Another v12 review leftover:

s/nearset/nearest/

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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