[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

[Ryan Novosielski]

> On Sep 10, 2018, at 18:15, Chris Samuel <chris at csamuel.org> wrote:
> 
>> On Tuesday, 11 September 2018 1:25:55 AM AEST Peter St. John wrote:
>> 
>> I had wanted to say that such a bug would be caught by compiling with some
>> reasonalbe warning level; but I think I was wrong.
> 
> Interesting - looks like it depends on your GCC version, 7.3.0 catches it with -Wall here:
> 
> chris at quad:/tmp$ gcc -Wall test.c -o test
> test.c: In function ‘main’:
> test.c:6:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
> if ( test );
> ^~
> test.c:7:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
>  printf ( "hello\n" );
>  ^~~~~~
> 
>> So I guess I have to forgive the software engineer who fat-fingered that
>> semicolon. Of course I've done worse.
> 
> Oh yes, same here too!   There but for... and all that. :-)

So we’ve learned what, here, that RedHat doesn’t test the RDMA stack at all?

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