On Tue, Dec 7, 2010 at 9:23 AM, Matthew Dillon <[email protected]> wrote: > > :I have had a patch kicking around for a while that I finally decided > :to beat into committable form, that brings the reference count into > :the m_ext structure. Currently there are very few users of M_EXT so I > :just modified them all to manage the refcount manually with atomic > :ops. Would we prefer this were functionalized, like FreeBSD has done? > : > :Also, It would be great if we could stuff a lwbuf into m_ext, but the > :only reasonable way I can see to do that is to add an additional > :function pointer which would be used to get the stable reference, as > :well as probably an offset, calling conventions would be slightly > :different for free in this case, and that route just doesn't feel very > :clean... So I was wondering if anyone had any suggestions? > : > :Thanks, > :Sam > > Wait, embedded into m_ext? The ref count, or the m_ext structure, > would have to be made a pointer so multiple mbufs can reference > the same m_ext. > > -Matt > Matthew Dillon > <[email protected]> >
Yeah, a kmalloc(9)'d int pointed to by the m_ext structure, versus external as now -- sorry if I was unclear. Sam
