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| author | dillon <dillon@FreeBSD.org> | 1999-09-22 04:11:55 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 1999-09-22 04:11:55 +0000 |
| commit | b33dd41466979c78a12984ac9944517db95fb465 (patch) | |
| tree | 972fb9c055905f2aa98b9f10f201e8c336811657 /sys/i386/include/param.h | |
| parent | 672be93090a198b13edea08617055f2fc7533a3a (diff) | |
| download | FreeBSD-src-b33dd41466979c78a12984ac9944517db95fb465.zip FreeBSD-src-b33dd41466979c78a12984ac9944517db95fb465.tar.gz | |
Change default block size for user VBLK device access from 2K to PAGE_SIZE
(4K on an i386, 8K on an alpha).
Make BLKDEV_IOSIZE, DFLTPHYS, and MAXPHYS kernel-configurable.
Diffstat (limited to 'sys/i386/include/param.h')
| -rw-r--r-- | sys/i386/include/param.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sys/i386/include/param.h b/sys/i386/include/param.h index 1a8b1a7..0bd98e4 100644 --- a/sys/i386/include/param.h +++ b/sys/i386/include/param.h @@ -91,9 +91,15 @@ #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1<<DEV_BSHIFT) -#define BLKDEV_IOSIZE 2048 +#ifndef BLKDEV_IOSIZE +#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ +#endif +#ifndef DFLTPHYS #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ +#endif +#ifndef MAXPHYS #define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ +#endif #define IOPAGES 2 /* pages of i/o permission bitmap */ #define UPAGES 2 /* pages of u-area */ |
