[Bug 1555700] Re: [FFE] Please merge tgt 1.0.63 from Debian (unstable)

[Ryan Harper]

Linking against libaio allows tgt to use libaio as a backend for submitting IO to the backing device.
The default backend uses pread64/pwrite64.  Adding an additional backed does not change this default

For users to consume the aio backend, they must specify the backend type
via command line switch (from tgtadm manpage):

-E, --bstype <type>
           When creating a LUN, this parameter specifies the type of backend
           storage to to use.

I believe that aio is out of the way for default users.  I'd like to get
some testing done on the aio backend before we say we'll support it.

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Title:
  [FFE] Please merge tgt 1.0.63 from Debian (unstable)

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