Re: [Qemu-devel] [PATCH] iothread: enable AioContext polling by default

[Stefan Hajnoczi <stefanha@redhat.com>]

[-- Attachment #1: Type: text/plain, Size: 1058 bytes --]

On Thu, Jan 26, 2017 at 05:01:19PM +0000, Stefan Hajnoczi wrote:
> IOThread AioContexts are likely to consist only of event sources like
> virtqueue ioeventfds and LinuxAIO completion eventfds that are pollable
> from userspace (without system calls).
> 
> We recently merged the AioContext polling feature but didn't enable it
> by default yet.  I have gone back over the performance data on the
> mailing list and picked a default polling value that gave good results.
> 
> Let's enable AioContext polling by default so users don't have another
> switch they need to set manually.  If performance regressions are found
> we can still disable this for the QEMU 2.9 release.
> 
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Karl Rister <krister@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  iothread.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)

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

Stefan

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 455 bytes --]