Karoly Balogh (Charlie/SGR) wrote:
Perhaps the most serious scenario is where an architecture or particular
implementation requires alignment, but the kernel traps alignment errors and
fixes them silently. SPARC Solaris does this and my understanding is that it
introduces a very significant performance overhead;
Linux also does this.
On some but by no means all platforms. I'm specifically trying to
highlight the fact that on SPARC, Solaris can fix alignment issues (at a
price) but Linux doesn't try to. I don't know to what extent there are
comparable issues on other platforms (in particular x86_64) for which
both Solaris and Linux are implemented.
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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