Re: [PATCH Remus v6 1/3] libxc/save: refactor of send_domain_memory_live()

[Yang Hongyang <yanghy@cn.fujitsu.com>]

On 05/15/2015 08:56 PM, Andrew Cooper wrote:
> On 15/05/15 11:17, Yang Hongyang wrote:
>> @@ -519,9 +533,15 @@ static int send_domain_memory_live(struct xc_sr_context *ctx)
>>           goto out;
>>       }
>>
>> -    rc = update_progress_string(ctx, &progress_str, ctx->save.max_iterations);
>> -    if ( rc )
>> -        goto out;
>> +    if ( ctx->save.live )
>> +    {
>> +        rc = update_progress_string(ctx, &progress_str,
>> +                                    ctx->save.max_iterations);
>> +        if ( rc )
>> +            goto out;
>> +    }
>> +    else
>> +        xc_set_progress_prefix(xch, "Checkpointed save");
>>
>>       bitmap_or(dirty_bitmap, ctx->save.deferred_pages, ctx->save.p2m_size);
>
> Sorry not to notice this before, but you want to clear the
> deferred_pages map (and count) after the subsequent call to
> send_dirty_pages().
>
> deferred_pages accumulates during the live phase (for grant mapped
> pages, pagetables in flux, etc), but should be empty an unused during
> checkpoints.  At the moment, this is causing each checkpoint to send
> more data than they need to.

Ah, it won't cause error in the test, so I missed this part, good catch,
thank you!

>
> For the rest of the refactoring, Reviewed-by: Andrew Cooper
> <andrew.cooper3@citrix.com>
> .
>

-- 
Thanks,
Yang.