[Libguestfs] [nbdkit PATCH v2 2/2] nbd: Split reading into separate thread

[Eric Blake]

On 11/14/2017 01:23 PM, Eric Blake wrote:
> In preparation for allowing interleaved response, refactor the
> nbd forwarder so that writes are still done from the thread
> handling the original request from the client, but all reads are
> done by a dedicated reader thread.  Control between the two
> flags is gated by a mutex for storing the transaction

s/flags/threads/

> information, coupled with a pipe for the reader thread to send
> the final status back to the handler thread.
> 
> Signed-off-by: Eric Blake <eblake at redhat.com>
> ---
>  plugins/nbd/nbd.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++--------
>  1 file changed, 100 insertions(+), 17 deletions(-)
> 

I don't mind pushing 1/2 right away, but I'd like to get my work on
PARALLEL support polished and post my 3/2 with full parallel forwarding
before I push 2/2.  Hopefully later today (last night, I had parallel
file plugin nearly working, except for the race during
test-socket-activation dying when plugin_name() was called after .unload...)

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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