Re: [dpdk-dev] [PATCH] doc: announce ivshmem support removal

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2016-07-22 00:36, Hiroshi Shimamoto:
> Hi,
> 
> > Subject: [dpdk-dev] [PATCH] doc: announce ivshmem support removal
> > 
> > There was a prior call with an explanation of what needs to be done:
> > 	http://dpdk.org/ml/archives/dev/2016-June/040844.html
> > - Qemu patch upstreamed
> > - IVSHMEM PCI device managed by a PCI driver
> > - No DPDK objects (ring/mempool) allocated by EAL
> > 
> > As nobody seems interested, it is time to remove this code which
> > makes EAL improvements harder.
> 
> I'd like to confirm about the issue.
> I know there are real users who rely on ivshmem mechanism. e.g. spp user.
> Unfortunately they don't prefer to expose their opinion to the community.
> Furthermore they may not have noticed this situation.

These secret users can use the version 16.07.

> Anyway, it is the issue that the current ivshmem implementation breaks
> EAL framework and is much complicated, right?
> IIUC, for DPDK, ivshmem support module should be separated from a middle of
> EAL code and make it as a PCI driver. That means the current rte_ivshmem
> removal should happen. To keep the functionality to share DPDK objects
> between host and guest in shared memory like ivshmem, it should be
> implemented cleanly.
> Is my understanding correct?

Yes
You just forgot the need for a patch on Qemu.