diff options
Diffstat (limited to 'sys/kern/subr_param.c')
| -rw-r--r-- | sys/kern/subr_param.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/sys/kern/subr_param.c b/sys/kern/subr_param.c index bf72a64..8c13336 100644 --- a/sys/kern/subr_param.c +++ b/sys/kern/subr_param.c @@ -48,7 +48,9 @@ __FBSDID("$FreeBSD$"); #include <sys/sysctl.h> #include <sys/msgbuf.h> +#include <vm/vm.h> #include <vm/vm_param.h> +#include <vm/pmap.h> /* * System parameter formulae. @@ -293,22 +295,17 @@ init_param2(long physpages) ncallout = 16 + maxproc + maxfiles; TUNABLE_INT_FETCH("kern.ncallout", &ncallout); -} - -/* - * Boot time overrides that are scaled against the kmem map - */ -void -init_param3(long kmempages) -{ /* - * The default for maxpipekva is max(5% of the kmem map, 512KB). - * See sys_pipe.c for more details. + * The default for maxpipekva is min(1/64 of the kernel address space, + * max(1/64 of main memory, 512KB)). See sys_pipe.c for more details. */ - maxpipekva = (kmempages / 20) * PAGE_SIZE; + maxpipekva = (physpages / 64) * PAGE_SIZE; if (maxpipekva < 512 * 1024) maxpipekva = 512 * 1024; + if (maxpipekva > (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 64) + maxpipekva = (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / + 64; TUNABLE_LONG_FETCH("kern.ipc.maxpipekva", &maxpipekva); } |
