linux-kernel - Re: [V9fs-developer] [PATCH v5 11/11] net/9p: allocate appropriate reduced message buffers

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Message-ID: <Ys6QlcShhji2sx9V@codewreck.org>
Date:   Wed, 13 Jul 2022 18:29:57 +0900
From:   Dominique Martinet <asmadeus@...ewreck.org>
To:     Christian Schoenebeck <linux_oss@...debyte.com>
Cc:     Latchesar Ionkov <lucho@...kov.net>,
        Eric Van Hensbergen <ericvh@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        v9fs-developer@...ts.sourceforge.net,
        Nikolay Kichukov <nikolay@...um.net>
Subject: Re: [V9fs-developer] [PATCH v5 11/11] net/9p: allocate appropriate
 reduced message buffers

Christian Schoenebeck wrote on Wed, Jul 13, 2022 at 11:19:48AM +0200:
> > - for this particular patch, we can still allocate smaller short buffers
> > for requests, so we should probably keep tsize to 0.
> > rsize there really isn't much we can do without a protocol change
> > though...
> 
> Good to know! I don't have any RDMA setup here to test, so I rely on what you 
> say and adjust this in v6 accordingly, along with the strcmp -> flag change of 
> course.

Yeah... I've got a connect-x 3 (mlx4, got a cheap old one) card laying
around, I need to find somewhere to plug it in and actually run some
validation again at some point.
Haven't used 9p/RDMA since I left my previous work in 2020...

I'll try to find time for that before the merge


> As this flag is going to be very RDMA-transport specific, I'm still scratching 
> my head for a good name though.

The actual limitation is that receive buffers are pooled, so something
to like pooled_rcv_buffers or shared_rcv_buffers or anything along that
line?

--
Dominique