Re: [Qemu-block] [PATCH v4 0/3] aio: Use epoll in aio_poll()

[Stefan Hajnoczi]

On Fri, Oct 30, 2015 at 12:06:26PM +0800, Fam Zheng wrote:
> v4: Rebase onto master (with aio_disable_external):
>     Don't use epoll if aio_external_disabled(ctx);
>     Change assert on epoll_ctl return code to disable epoll;
>     Rerun benchmark;
> 
> v3: Remove the redundant check in aio_epoll_try_enable. [Stefan]
> 
> v2: Merge aio-epoll.c into aio-posix.c. [Paolo]
>     Capture some benchmark data in commit log.
> 
> This series adds the ability to use epoll in aio_poll() on Linux. It's 
> switched
> on in a dynamic way rather than static for two reasons: 1) when the number of
> fds is not high enough, using epoll has little advantage; 2) when an epoll
> incompatible fd needs to be handled, we need to fall back.  The epoll is
> enabled when a fd number threshold is met.
> 
> 
> Fam Zheng (3):
>   aio: Introduce aio_external_disabled
>   aio: Introduce aio_context_setup
>   aio: Introduce aio-epoll.c
> 
>  aio-posix.c         | 188 
> +++++++++++++++++++++++++++++++++++++++++++++++++++-
>  aio-win32.c         |   4 ++
>  async.c             |  13 +++-
>  include/block/aio.h |  24 +++++++
>  4 files changed, 226 insertions(+), 3 deletions(-)
> 
> -- 
> 2.4.3
> 

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan

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