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Date:      Wed, 24 Jan 2001 16:46:23 -0500 (EST)
From:      Zhiui Zhang <zzhang@cs.binghamton.edu>
To:        freebsd-hackers@freebsd.org
Subject:   buffer headers in FreeBSD & Linux
Message-ID:  <Pine.SOL.4.21.0101241642010.478-100000@onyx>

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I am wondering why FreeBSD has fixed number of buffer headers (nbuf) while
Linux can grow the number of buffer headers on the fly. In FreeBSD, we
have a lofreebuffers count.  I think this is a reserve for avoiding
deadlock when the buffer headers are low.  But Linux does not seem to have
such a counter.  How do they solve this problems? What's the pros and cons
of these two different schemes?

Any help is appreciated!

-Zhihui



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