From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: how does it count the number of contiguous physical
 pages in map_all_hugepages
Date: Fri, 16 Jan 2015 11:01:06 +0000
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To: "Jack,Xie Jie" <jack.xie-brrHP2FUjwfby3iVrkZq2A@public.gmane.org>
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On Fri, Jan 16, 2015 at 05:32:08AM +0000, Jack,Xie Jie wrote:
> Hi,
> 
> I am learning DPDK recently, when I check l2fwd example, I am a little confused, please someone give me a clue.
> 
> In function map_all_hugepages called in rte_eal_hugepage_init,
> There are lines of source code like below to count the number of contiguous physical pages,
> But I check the source code, I just cannot find where is hugepg_tbl[j].physaddr be set before,
> how can here check the value of hugepg_tbl[j].physaddr.
> 
> /* reserve a virtual area for next contiguous
>                             * physical block: count the number of
>                             * contiguous physical pages. */
>                             for (j = i+1; j < hpi->num_pages[0] ; j++) {
>                                      if (hugepg_tbl[j].physaddr !=
>                                          hugepg_tbl[j-1].physaddr + hugepage_sz)
>                                                break;
>                             }
> 
> 
> Thanks !
> Jack

See function "find_physaddrs" in "eal_memory.c".

Regards,
/Bruce