I recently tried some experiments to reduce the number of mbuf and cluster allocations in a 40G NIC driver. M_NOFREE and EXT_EXTREF proved very useful and the code changes to the kernel were minimal. See user/np/cxl_tuning. The experiment was quite successful and I was planning to bring in most of those changes to HEAD. I was hoping to get some runtime mileage on the approach in general before tweaking the ctors/dtors for jumpbo, jumbo9, jumbo16 to allow for an mbuf+refcnt within the cluster. But now M_NOFREE has vanished without a warning...
I also had a virtualization work-in-progress where static mbufs were allocated in the kernel and M_NOFREE set.
Might be worth sending a prior heads-up for these type of changes. later, Peter. _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
