On Sat, 2014-02-08 at 17:57 +0100, Thomas Glanzmann wrote: > Hello Eric, > > > Note : We did some patches in the MSG_MORE logic for sendpage(), but > > in your case I do not think its related > > (git grep -n MSG_SENDPAGE_NOTLAST ) if you are curious > > thank you for the pointer. The iSCSI target code actually uses sendpage > whenever it can. Yep, but the problem (at least on your pcap), is about sending the 48 bytes headers in TCP segment of its own, then the 512 byte payload in a separate segment. I suspect the sendpage() is only used for the payload. No need for MSG_MORE here. The MSG_MORE would need to be set on the first part (48 bytes header), so that TCP stack will defer the push of the segment at the time the 512 bytes payload is added. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
