Re: [PATCH] UDPCP Communication Protocol
From: Stephen Hemminger <hidden>
Date: 2010-12-31 17:46:38
Also in:
lkml
On Fri, 31 Dec 2010 10:29:45 +0100 stefani@seibold.net wrote:
+struct __attribute__ ((packed)) udpcphdr {
+ struct udphdr udphdr;
+ __be32 chksum;
+ __be16 msginfo;
+ u8 fragamount;
+ u8 fragnum;
+ __be16 msgid;
+ __be16 length;
+};Adding (unnecessary) packed attribute will make access slow on some architectures. For arch that can't do unaligned access, the compiler ends up doing byte access for each element.