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| author | dyson <dyson@FreeBSD.org> | 1996-06-21 05:39:22 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1996-06-21 05:39:22 +0000 |
| commit | 010ba0185af24c524bca481ab275ea5cb3e67666 (patch) | |
| tree | 1d333c6207bccd61c0c2ff5a5830f90dc7b2cb2f /sys | |
| parent | cd538300607b397e5d82100952d4ea7ea2681316 (diff) | |
| download | FreeBSD-src-010ba0185af24c524bca481ab275ea5cb3e67666.zip FreeBSD-src-010ba0185af24c524bca481ab275ea5cb3e67666.tar.gz | |
Improve algorithm for page hash queue. It was previously about
as bad as it could be. This algorithm appears to improve fork
performance (barely) measurably.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/vm/vm_page.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 445c207..880c3dd 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)vm_page.c 7.4 (Berkeley) 5/7/91 - * $Id: vm_page.c,v 1.57 1996/06/16 20:37:31 dyson Exp $ + * $Id: vm_page.c,v 1.58 1996/06/17 03:35:37 dyson Exp $ */ /* @@ -373,7 +373,7 @@ vm_page_hash(object, pindex) vm_object_t object; vm_pindex_t pindex; { - return ((unsigned) object + pindex) & vm_page_hash_mask; + return ((((unsigned) object) >> 5) + (pindex >> 1)) & vm_page_hash_mask; } /* |
