diff options
| author | dg <dg@FreeBSD.org> | 1996-02-22 10:57:37 +0000 |
|---|---|---|
| committer | dg <dg@FreeBSD.org> | 1996-02-22 10:57:37 +0000 |
| commit | f54e4705e69eea4684321d09a2a8c4fab628b5ce (patch) | |
| tree | 417e29a08626b6c8041f78bb5ff3065d5927f43b /sys/vm/vm_glue.c | |
| parent | 60f52cc4c159387974b7ca89b671e47d3f44ef62 (diff) | |
| download | FreeBSD-src-f54e4705e69eea4684321d09a2a8c4fab628b5ce.zip FreeBSD-src-f54e4705e69eea4684321d09a2a8c4fab628b5ce.tar.gz | |
Add a "NO_SWAPPING" option to disable swapping. This was originally done
to help diagnose a problem on wcarchive (where the kernel stack was
sometimes not present), but is useful in its own right since swapping
actually reduces performance on some systems (such as wcarchive).
Note: swapping in this context means making the U pages pageable and has
nothing to do with generic VM paging, which is unaffected by this option.
Reviewed by: <dyson>
Diffstat (limited to 'sys/vm/vm_glue.c')
| -rw-r--r-- | sys/vm/vm_glue.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c index 22bda4f..1d45e37 100644 --- a/sys/vm/vm_glue.c +++ b/sys/vm/vm_glue.c @@ -59,7 +59,7 @@ * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. * - * $Id: vm_glue.c,v 1.37 1996/01/25 07:15:40 phk Exp $ + * $Id: vm_glue.c,v 1.38 1996/01/29 12:10:30 davidg Exp $ */ #include "opt_sysvipc.h" @@ -484,12 +484,12 @@ loop: goto loop; } +#ifndef NO_SWAPPING + #define swappable(p) \ (((p)->p_lock == 0) && \ ((p)->p_flag & (P_TRACED|P_NOSWAP|P_SYSTEM|P_INMEM|P_WEXIT|P_PHYSIO|P_SWAPPING)) == P_INMEM) -extern int vm_pageout_free_min; - /* * Swapout is driven by the pageout daemon. Very simple, we find eligible * procs and unwire their u-areas. We try to always "swap" at least one @@ -600,6 +600,7 @@ swapout(p) p->p_flag &= ~P_SWAPPING; p->p_swtime = 0; } +#endif /* !NO_SWAPPING */ #ifdef DDB /* |
