On Fri, Jan 20, 2017 at 05:43:05PM +0100, Paolo Bonzini wrote: > This series pushes down aio_context_acquire/release to the point > where we can actually reason on using different fine-grained mutexes. > > The main infrastructure is introduced in patch 1. The new API aio_co_wake > starts a coroutine with aio_context_acquire/release protection, which > requires tracking each coroutine's "home" AioContext. aio_co_schedule > instead takes care of moving a sleeping coroutine to a different > AioContext, also ensuring that it runs under aio_context_acquire/release. > This is useful to implement bdrv_set_aio_context, as a simpler alternative > to bottom halves. Even though one-shot BHs are already simpler than > what we had before, after this patch aio_co_wake and aio_co_schedule > save you from having to do aio_context_acquire/release explicitly. > > After patch 2 to 4, which are just small preparatory changes, patches > 5 to 8 provide an example of how to use the new API. In particular patch > 5 to 7 implement a new organization of coroutines in the NBD client, > which allows not blocking on partial reply header reads.
FYI, I added my S-o-B to the two io: patches, so when this series is ready just include them in your main pull request - no need for me to take those io: patches separately. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://entangle-photo.org -o- http://search.cpan.org/~danberr/ :|
