d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merged from sys/i386/i386/machdep.c revision 1.387.

Browse Source
This commit is contained in:
kato 2000-03-28 15:04:29 +00:00
parent be49c2ca4b
commit 72790a030b
2 changed files with 48 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
sys/pc98/i386/machdep.c
View File

@ -358,13 +358,35 @@ cpu_startup(dummy)
valloc(msqids, struct msqid_ds, msginfo.msgmni);
#endif
/*
* The nominal buffer size (and minimum KVA allocation) is BKVASIZE.
* For the first 64MB of ram nominally allocate sufficient buffers to
* cover 1/4 of our ram. Beyond the first 64MB allocate additional
* buffers to cover 1/20 of our ram over 64MB.
*
* factor represents the 1/4 x ram conversion.
*/
if (nbuf == 0) {
int factor = 4 * BKVASIZE / PAGE_SIZE;
nbuf = 50;
if (physmem > 1024)
nbuf += min((physmem - 1024) / 8, 2048);
nbuf += min((physmem - 1024) / factor, 16384 / factor);
if (physmem > 16384)
nbuf += (physmem - 16384) / 20;
nbuf += (physmem - 16384) * 2 / (factor * 5);
}
/*
* Do not allow the buffer_map to be more then 1/2 the size of the
* kernel_map.
*/
if (nbuf > (kernel_map->max_offset - kernel_map->min_offset) /
(BKVASIZE * 2)) {
nbuf = (kernel_map->max_offset - kernel_map->min_offset) /
(BKVASIZE * 2);
printf("Warning: nbufs capped at %d\n", nbuf);
}
nswbuf = max(min(nbuf/4, 256), 16);
valloc(swbuf, struct buf, nswbuf);

26
sys/pc98/pc98/machdep.c
View File

@ -358,13 +358,35 @@ cpu_startup(dummy)
valloc(msqids, struct msqid_ds, msginfo.msgmni);
#endif
/*
* The nominal buffer size (and minimum KVA allocation) is BKVASIZE.
* For the first 64MB of ram nominally allocate sufficient buffers to
* cover 1/4 of our ram. Beyond the first 64MB allocate additional
* buffers to cover 1/20 of our ram over 64MB.
*
* factor represents the 1/4 x ram conversion.
*/
if (nbuf == 0) {
int factor = 4 * BKVASIZE / PAGE_SIZE;
nbuf = 50;
if (physmem > 1024)
nbuf += min((physmem - 1024) / 8, 2048);
nbuf += min((physmem - 1024) / factor, 16384 / factor);
if (physmem > 16384)
nbuf += (physmem - 16384) / 20;
nbuf += (physmem - 16384) * 2 / (factor * 5);
}
/*
* Do not allow the buffer_map to be more then 1/2 the size of the
* kernel_map.
*/
if (nbuf > (kernel_map->max_offset - kernel_map->min_offset) /
(BKVASIZE * 2)) {
nbuf = (kernel_map->max_offset - kernel_map->min_offset) /
(BKVASIZE * 2);
printf("Warning: nbufs capped at %d\n", nbuf);
}
nswbuf = max(min(nbuf/4, 256), 16);
valloc(swbuf, struct buf, nswbuf);