|
| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH 0/4] introduce cpu_physical_memory_map_fast |
| Date: | Fri, 13 May 2011 08:33:13 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.10 |
On 05/12/2011 05:32 PM, Avi Kivity wrote:
Out of curiosity, what performance benefit do you see?
Zero. :) Also because the only real change is in patch 4/4 (milkymist) which I only compile-tested. In all other instances, using cpu_physical_memory_map_fast is just to make it clear that we don't want bounce buffers.
However, this is just preparatory work for vmw_pvscsi, which will use the functions to build its iovecs. qemu_get_ram_ptr would not really be a satisfactory API for that.
Paolo
| [Prev in Thread] | Current Thread | [Next in Thread] |