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recover traditional MINCLSIZE (= MHLEN + MLEN + 1). it will make 

drivers less aggressive about use of cluster mbufs.

this chnage affects drivers with m_devget()-emulation.  many of
recent drivers do not look at MINCLSIZE any more, not sure why.
This commit is contained in:
itojun 2000-07-27 17:18:19 +00:00
parent c849d97e50
commit 4f825aaddd
1 changed files with 2 additions and 2 deletions
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4
sys/sys/mbuf.h
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@ -1,4 +1,4 @@
/* $NetBSD: mbuf.h,v 1.49 2000/03/01 12:49:27 itojun Exp $ */
/* $NetBSD: mbuf.h,v 1.50 2000/07/27 17:18:19 itojun Exp $ */
/*-
* Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
@ -97,7 +97,7 @@
* non-external mbufs in the driver. This has no impact on performance
* seen from the packet statistics, and avoid header pullups in network code.
*/
#define MINCLSIZE (MHLEN + 1) /* smallest amount to put in cluster */
#define MINCLSIZE (MHLEN+MLEN+1) /* smallest amount to put in cluster */
#define M_MAXCOMPRESS (MHLEN / 2) /* max amount to copy for compression */
/*