Date: Tue, 20 Feb 1996 18:09:45 -0800 From: davidg@Root.COM (David Greenman) To: hackers@freebsd.org Subject: Re: mbuf enhancement patch Message-ID: <199602210209.SAA04797@Root.COM>
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>> We once had changes similar to the ones you've provided, except we had it >>so that the buffers over a certain threshold were returned back to malloc. The >>problem with this was that the malloc type was lost in the process and this >>messed up the malloc-type accounting (which eventually leads to malloc >>failures). > >I found the ep driver always keeps some mbuf's in its pool. Is this >because mbuf allocation is too expensive for boards which equip small >receive buffer? If this is the case, some improvement (not mine :-) is >desirable. I think that's what the author thought, but the FIFO on the 3c509 should be sufficiently large enough to not need the extra 1% of speed that having the private pool gets you. Our malloc implementation is quite efficient, actually. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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