Date: Sun, 14 Sep 2014 22:42:43 +0800 From: "dongshan" <thomasyang1206@126.com> To: <net@freebsd.org> Subject: netmap BUG found on big endian machine Message-ID: <001e01cfd02a$255cb430$70161c90$@126.com>
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Hi,
I have tested netmap on freescale PowerPC board, it is a big endian
machine, when I test the example app pkt-gen£¬ I found one bug, really it is
bug of netmap souce code.
The commit id is ¡°d39c4411a2129926d262f9faffacaf876392c7cd¡±, the
bug locates in ¡°netmap_mem2.c, netmap_mem_rings_create()¡±, you should use
¡°*(uint32_t *)(uintptr_t)&ring->nr_buf_size =
NETMAP_BDG_BUF_SIZE(na->nm_mem);¡± substituting
¡°*(uint16_t *)(uintptr_t)&ring->nr_buf_size =
NETMAP_BDG_BUF_SIZE(na->nm_mem);¡±
Because the outcome of big endian and little endian is different. I
guess the source code is written and tested on intel arch machine. But it is
true it can¡¯t run big endian machine directly.
Best regards,
Dongshan
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