Please ignore the message I sent yesterday. I have figured it out. Thanks. On Wed, Jul 20, 2011 at 5:54 PM, Chen Tian <chen.tian@acm.org> wrote:

Hello,

Why was a sender's send item (e.g. mr[0] and mr[1] ) merged and stored into the receiver's mr[0]?

Basically I have trouble understanding the following code.

*rcv_words=(item->b.raw() & ~0x0ff7) | (sfp.raw())&0x0ff0); rcv_word +=2 ;

Why didn't we use receiver's mr[1] as well? In the case of page fault handling IPC, the pf address stored in sender's mr[1] is not used ?

Thanks.

Chen