[Qemu-devel] [PATCH v7 0/3] linux-aio: fix batch submission

[Ming Lei]

The 1st patch fixes batch submission.

The 2nd one fixes -EAGAIN for non-batch case.

The 3rd one is a cleanup.

This patchset is splitted from previous patchset(dataplane: optimization
and multi virtqueue support), as suggested by Stefan.

V7:
        - add protection for aborting in laio_attach_aio_context(), as suggested
        by Stefan, 1/3
        - patch style, return real aborting failure to caller, as suggested
        by Kevin, 1/3
        - track pending I/O and only handle -EAGAIN if there is pending I/O,
        pointed by Kevin, 2/3 

V6:
        - don't pass ioq_submit() return value to ioq_enqueue(), as suggested
        by Stefan
        - fix one build failure introduced in V5, reported by Stefan

V5:
        - in case of submission failure, return -EIO for new coming requests
        until aborting is handled
        - in patch2, follow Paolo's suggestion about ioq_enqueue() changes

V4:
        - abort reuqests in BH to abvoid potential "Co-routine re-entered 
recursively"
        - remove 'enqueue' parameter to ioq_submit() to simpify change
        - beautify code as suggested by Paolo

V3:
        - rebase on QEMU master
V2:
        - code style fix and commit log fix as suggested by Benoît Canet
V1:
        - rebase on latest QEMU master

 block/linux-aio.c |  139 ++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 116 insertions(+), 23 deletions(-)


Thanks,
Ming Lei