On Thu, Apr 17, 2008 at 02:26:52PM -0500, Anthony Liguori wrote:
This patch introduces a Linux-aio backend that is disabled by default. To
use this backend effectively, the user should disable caching and select
it with the appropriate -aio option. For instance:
qemu-system-x86_64 -drive
Marcelo Tosatti wrote:
On Thu, Apr 17, 2008 at 02:26:52PM -0500, Anthony Liguori wrote:
This patch introduces a Linux-aio backend that is disabled by default. To
use this backend effectively, the user should disable caching and select
it with the appropriate -aio option. For instance:
On Fri, Apr 18, 2008 at 10:18:33AM -0500, Anthony Liguori wrote:
Sleeping in the context of vcpu's is extremely bad (eg virtio-block
blocks in write() throttling which kills performance). It should wait
on IO completions instead (qemu-kvm.c creates a pthread waitqueue to
resolve that issue).
This patch introduces a Linux-aio backend that is disabled by default. To
use this backend effectively, the user should disable caching and select
it with the appropriate -aio option. For instance:
qemu-system-x86_64 -drive foo.img,cache=off -aio linux
There's no universal way to asynchronous
