On Sun, Nov 7, 2021 at 4:00 PM Richard W.M. Jones <[email protected]> wrote:
>
> On Sun, Nov 07, 2021 at 03:27:47PM +0200, Nir Soffer wrote:
> > When using qemu-nbd with systemd socket activation, trying to connect
> > additional clients concurrently fails with:
> >
> >     nbd_connect_uri: connect: server backlog overflowed, see
> >     https://bugzilla.redhat.com/1925045: Resource temporarily
> >     unavailable
> >
> > But this bug was fixed in qemu-nbd long time ago; turns out that libnbd
> > has the same bug, creating the server socket with:
> >
> >     listen(s, 1);
> >
> > Use SOMAXCONN so we can have multiple connections for better
> > performance. I think this can be very useful for nbdcopy.
>
> Apart from the problems in API mentioned in the other review, this
> patch ordering isn't bisectable.
>
> What's the motivation for this patch series?

Why is it not bissectable?

In general, I like to add first tests before I modify code. In the best case
the test also reproduces the issue. Having a failing test in the build is
better than having a bug.

In this case the test is too simple, we need to use multiple threads to
reproduce the issue.

We can switch the order if you don't like this approach.

Nir

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