From: Alexander Duyck <alexander.h.du...@redhat.com> Date: Mon, 04 May 2015 16:14:42 -0700
> This patch set cleans up some of the handling of page frags used in the skb > allocation. The issue was we were having to use a number of calls to > virt_to_head_page in a number of places and then following that up with > put_page. Both calls end up being expensive, the first due to size, and > the second due to the fact that we end up having to call a number of other > functions before we finally see the page freed in the case of compound > pages. > > The skb_free_frag function is meant to resolve that by providing a > centralized location for the virt_to_head_page call and by coalesing > several checks such as the check for PageHead into a single check so that > we can keep the instruction cound minimal when freeing the page frag. > > With this change I am seeing an improvement of about 5% in a simple > receive/drop test. I'm going to need to see some buyin from the mm folks on this series. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
