linux-kernel - Re: [PATCH v6 00/11] remove msize limit in virtio transport

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Date:   Sat, 16 Jul 2022 14:10:05 +0200
From:   Christian Schoenebeck <linux_oss@...debyte.com>
To:     Dominique Martinet <asmadeus@...ewreck.org>
Cc:     v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        Nikolay Kichukov <nikolay@...um.net>
Subject: Re: [PATCH v6 00/11] remove msize limit in virtio transport

On Samstag, 16. Juli 2022 13:54:08 CEST Dominique Martinet wrote:
> Christian Schoenebeck wrote on Sat, Jul 16, 2022 at 11:54:29AM +0200:
> > > Looks good to me, I'll try to get some tcp/rdma testing done this
> > > weekend and stash them up to next
> > 
> > Great, thanks!
> 
> Quick update on this: tcp seems to work fine, I need to let it run a bit
> longer but not expecting any trouble.
> 
> RDMA is... complicated.
> I was certain an adapter in loopback mode ought to work so I just
> bought a cheap card alone, but I couldn't get it to work (ipoib works
> but I think that's just the linux tcp stack cheating, I'm getting unable
> to resolve route (rdma_resolve_route) errors when trying real rdma
> applications...)
> 
> 
> OTOH, linux got softiwarp merged in as RDMA_SIW which works perfectly
> with my rdma applications, after fixing/working around a couple of bugs
> on the server I'm getting hangs that I can't reproduce with debug on
> current master so this isn't exactly great, not sure where it goes
> wrong :|
> At least with debug still enabled I'm not getting any new hang with your
> patches, so let's call it ok...?

Well, I would need more info to judge or resolve that, like which patch 
exactly broke RDMA behaviour for you?

> I'll send a mail to ex-collegues who might care about it (and
> investigate a bit more if so), and a more open mail if that falls
> short...
> 
> --
> Dominique