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update explanatory comment about NOCSPTRS to reflect that fs_active 

is now within that region.
no functional change
This commit is contained in:
dbj 2003-12-31 18:53:45 +00:00
parent 8ed8ec9577
commit c0000df464
1 changed files with 5 additions and 4 deletions
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9
sys/ufs/ffs/fs.h
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@ -1,4 +1,4 @@
/* $NetBSD: fs.h,v 1.35 2003/09/29 20:34:23 dbj Exp $ */
/* $NetBSD: fs.h,v 1.36 2003/12/31 18:53:45 dbj Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
@ -132,14 +132,15 @@
/*
* There is a 128-byte region in the superblock reserved for in-core
* pointers to summary information. Originally this included an array
* of pointers to blocks of struct csum; now there are just three
* of pointers to blocks of struct csum; now there are just four
* pointers and the remaining space is padded with fs_ocsp[].
* NOCSPTRS determines the size of this padding. One pointer (fs_csp)
* is taken away to point to a contiguous array of struct csum for
* all cylinder groups; a second (fs_maxcluster) points to an array
* of cluster sizes that is computed as cylinder groups are inspected;
* and the third points to an array that tracks the creation of new
* directories.
* the third (fs_contigdirs) points to an array that tracks the
* creation of new directories; and the fourth (fs_active) is used
* by snapshots.
*/
#define NOCSPTRS ((128 / sizeof(void *)) - 4)