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Some *very* major changes by darrenk@insightdist.com (Darren King)

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==========================================
What follows is a set of diffs that cleans up the usage of BLCKSZ.

As a side effect, the person compiling the code can change the
value of BLCKSZ _at_their_own_risk_.  By that, I mean that I've
tried it here at 4096 and 16384 with no ill-effects.  A value
of 4096 _shouldn't_ affect much as far as the kernel/file system
goes, but making it bigger than 8192 can have severe consequences
if you don't know what you're doing.  16394 worked for me, _BUT_
when I went to 32768 and did an initdb, the SCSI driver broke and
the partition that I was running under went to hell in a hand
basket. Had to reboot and do a good bit of fsck'ing to fix things up.

The patch can be safely applied though.  Just leave BLCKSZ = 8192
and everything is as before.  It basically only cleans up all of the
references to BLCKSZ in the code.

If this patch is applied, a comment in the config.h file though above
the BLCKSZ define with warning about monkeying around with it would
be a good idea.

Darren  darrenk@insightdist.com

(Also cleans up some of the #includes in files referencing BLCKSZ.)
==========================================
This commit is contained in:
Marc G. Fournier
1998-01-13 04:05:12 +00:00
parent f0445dcbc4
commit 374bb5d261
15 changed files with 156 additions and 167 deletions
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10
src/include/storage/bufmgr.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: bufmgr.h,v 1.15 1997/09/08 21:54:18 momjian Exp $
* $Id: bufmgr.h,v 1.16 1998/01/13 04:05:09 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@@ -26,12 +26,16 @@
* in theory this could be anything, but in practice this is actually
* limited to 2^13 bytes because we have limited ItemIdData.lp_off and
* ItemIdData.lp_len to 13 bits (see itemid.h).
*
* limit is now 2^15. Took four bits from ItemIdData.lp_flags and gave
* two apiece to ItemIdData.lp_len and lp_off. darrenk 01/06/98
*
*/
#define MAXBLCKSZ 8192
#define MAXBLCKSZ 32768
typedef void *Block;
/* special pageno for bget */
#define P_NEW InvalidBlockNumber /* grow the file to get a new page */