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| author | sepotvin <sepotvin@FreeBSD.org> | 2007-04-21 01:14:48 +0000 |
|---|---|---|
| committer | sepotvin <sepotvin@FreeBSD.org> | 2007-04-21 01:14:48 +0000 |
| commit | a1e73b1eafb356ff4adba96fd8099c15c11471cd (patch) | |
| tree | 7a4cb32527ec0601ac8912d8ef1baa9431ee0a67 /sys/kern/kern_malloc.c | |
| parent | a1cba020dddfbcf1bcb0f4124b38e2255f16bdc9 (diff) | |
| download | FreeBSD-src-a1e73b1eafb356ff4adba96fd8099c15c11471cd.zip FreeBSD-src-a1e73b1eafb356ff4adba96fd8099c15c11471cd.tar.gz | |
Add support for specifying a minimal size for vm.kmem_size in the loader via
vm.kmem_size_min. Useful when using ZFS to make sure that vm.kmem size will
be at least 256mb (for example) without forcing a particular value via vm.kmem_size.
Approved by: njl (mentor)
Reviewed by: alc
Diffstat (limited to 'sys/kern/kern_malloc.c')
| -rw-r--r-- | sys/kern/kern_malloc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/kern/kern_malloc.c b/sys/kern/kern_malloc.c index b05d13a..19fbf30 100644 --- a/sys/kern/kern_malloc.c +++ b/sys/kern/kern_malloc.c @@ -178,6 +178,10 @@ u_int vm_kmem_size; SYSCTL_UINT(_vm, OID_AUTO, kmem_size, CTLFLAG_RD, &vm_kmem_size, 0, "Size of kernel memory"); +u_int vm_kmem_size_min; +SYSCTL_UINT(_vm, OID_AUTO, kmem_size_min, CTLFLAG_RD, &vm_kmem_size_min, 0, + "Minimum size of kernel memory"); + u_int vm_kmem_size_max; SYSCTL_UINT(_vm, OID_AUTO, kmem_size_max, CTLFLAG_RD, &vm_kmem_size_max, 0, "Maximum size of kernel memory"); @@ -557,6 +561,14 @@ kmeminit(void *dummy) (mem_size / vm_kmem_size_scale) > (vm_kmem_size / PAGE_SIZE)) vm_kmem_size = (mem_size / vm_kmem_size_scale) * PAGE_SIZE; +#if defined(VM_KMEM_SIZE_MIN) + vm_kmem_size_min = VM_KMEM_SIZE_MIN; +#endif + TUNABLE_INT_FETCH("vm.kmem_size_min", &vm_kmem_size_min); + if (vm_kmem_size_min > 0 && vm_kmem_size < vm_kmem_size_min) { + vm_kmem_size = vm_kmem_size_min; + } + #if defined(VM_KMEM_SIZE_MAX) vm_kmem_size_max = VM_KMEM_SIZE_MAX; #endif |
