cvs commit: src/sys/amd64/include _types.h src/sys/i386/include _types.h src/sys/net if_bridge.c src/sys/netinet ip_var.h src/sys/netinet6 ip6_var.h

[Robert Watson]

On Mon, 4 Jul 2005, Peter Grehan wrote:

>>   Check the alignment of the IP header before passing the packet up to the
>>   packet filter. This would cause a panic on architectures that require 
>> strict
>>   alignment such as sparc64 (tier1) and ia64/ppc (tier2).
>
> FYI, any modern ppc implementation doesn't require strict alignment for 
> integer load/stores though there's a performance penalty for having to 
> split the access into smaller ones.

While it's not immediately relevant to the IP code, generally speaking, is 
it the case that non-aligned integer reads can be non-atomic with respect 
to other CPUs due to the multiple access implementation?

Robert N M Watson