njoly@pasteur.fr said:
> Could this be a bug in memset from suse 10.0 glibc

I wouldn't call it a bug. It is likely an optimisation
to allocate a cache line in case the system doesn't do
write allocation, thus avoiding write-through latency.
This is legal. Depending on architecture and alignment
there are cases where physical reads can't be avoided
at all.

Relying on write-only semantics is inherently non-portable.

best regards
Matthias




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