netdev - Re: [PATCH] SUNRPC: Output oversized frag reclen as ASCII if printable

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Date:   Fri, 19 Mar 2021 15:07:12 +0000
From:   Chris Down <chris@...isdown.name>
To:     Chuck Lever III <chuck.lever@...cle.com>
Cc:     Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
        Linux-Net <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Bruce Fields <bfields@...hat.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] SUNRPC: Output oversized frag reclen as ASCII if
 printable

Hey Chuck,

Thanks for the (very) fast reply! :-)

Chuck Lever III writes:
>> This can be confusing for downstream users, who don't know what messages
>> like "fragment too large: 1195725856" actually mean, or that they
>> indicate some misconfigured infrastructure elsewhere.
>
>One wonders whether that error message is actually useful at all.
>We could, for example, turn this into a tracepoint, or just get
>rid of it.

Indeed, that's also a good outcome. Personally I've never seen these 
legitimately fire in production outside of cases like the one described, and we 
historically ran a pretty diverse set of use cases for NFS.

Maybe safer to convert to a tracepoint just in case? Either way sounds fine 
though -- let me know what you'd like for v2 and I'll send it over. :-)

Thanks!

Chris