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Partially revert revision 1.66, which contained a change that did not

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correspond to the commit log.  It changed the maxswzone and maxbcache
parameters from int to long, without changing the extern definitions
in <sys/buf.h>.

In fact it's a good thing it did not, because other parts of the system
are not yet ready for this, and on large-memory sparc machines it causes
severe filesystem damage if you try.

The worst effect of the change was that the tunables controlling the
above variables stopped working.  These were necessary to allow such
large sparc64 machines (with >12GB RAM) to boot, since sparc64 did not
set a hard-coded upper limit on these parameters and they ended
up overflowing an int, causing an infinite loop at boot in bufinit().

Reviewed by:	mlaier
This commit is contained in:
Kris Kennaway 2005-10-14 19:15:10 +00:00
parent 26390635de
commit f098dcded5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=151342
1 changed files with 4 additions and 4 deletions
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8
sys/kern/subr_param.c
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@ -75,8 +75,8 @@ int maxfilesperproc; /* per-proc open files limit */
int ncallout; /* maximum # of timer events */
int nbuf;
int nswbuf;
long maxswzone; /* max swmeta KVA storage */
long maxbcache; /* max buffer cache KVA storage */
int maxswzone; /* max swmeta KVA storage */
int maxbcache; /* max buffer cache KVA storage */
int maxpipekva; /* Limit on pipe KVA */
u_long maxtsiz; /* max text size */
u_long dfldsiz; /* initial data size limit */
@ -106,11 +106,11 @@ init_param1(void)
#ifdef VM_SWZONE_SIZE_MAX
maxswzone = VM_SWZONE_SIZE_MAX;
#endif
TUNABLE_LONG_FETCH("kern.maxswzone", &maxswzone);
TUNABLE_INT_FETCH("kern.maxswzone", &maxswzone);
#ifdef VM_BCACHE_SIZE_MAX
maxbcache = VM_BCACHE_SIZE_MAX;
#endif
TUNABLE_LONG_FETCH("kern.maxbcache", &maxbcache);
TUNABLE_INT_FETCH("kern.maxbcache", &maxbcache);
maxtsiz = MAXTSIZ;
TUNABLE_ULONG_FETCH("kern.maxtsiz", &maxtsiz);