[arch-general] gcc broken - Arch specific, applying optimization incorrectly - may explain unexplained problems

[David C. Rankin]

On 03/13/2018 02:17 AM, PkmX via arch-general wrote:
> Hi,
> 
> AFAIK this is the exact case of gcc bugzilla #84607:
> 
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84607
> 
> As this is an upstream bug this should affect all distributions, maybe
> the commenter on Debian is using 7.3.1 so he can't reproduce the
> issue?
> 

That is good to know that it is being addressed. I can see this current
handling of optimizations causing many of subtle non-traceable and just plain
"wonky" errors that have been see these past few days. I thought the guy who
posted it was nuts... It built and had the correct output on SuSE, but when I
tried it on Arch - WTF? they was right. Who knows in how many subtle ways that
could manifest itself. I've convinced it is as the root of the (Out of IOMMU
space) error I have in the logs, and more than likely it is responsible for my
hardlocks on the big servers. We will be looking for a fix -- hopefully soon.

Thank you for letting me know.

-- 
David C. Rankin, J.D.,P.E.