Re: [Qemu-devel] Block I/O outside the QEMU global mutex was "Re: [RFC PATCH 00/17] Support for multiple "AIO contexts""

[Paolo Bonzini]

Il 10/10/2012 14:25, Anthony Liguori ha scritto:
>> > NBD uses coroutines; curl can use the non-unlocked
>> > bdrv_aio_readv/writev.  In both cases they would execute in the
>> > dataplane thread.  qcow2-over-raw would also execute its read/write code
>> > entirely from the dataplane thread, for example.
> Does that mean that we'd stop processing the queue if we're waiting for
> an I/O completion to handle meta data operations?
> 
> If that's the case, that probably will hurt performance overall.

>From discussion on IRC it looked like this was ENOCAFFEINE. :)

Paolo