diff options
| author | Arjan van de Ven <arjanv@redhat.com> | 2004-08-23 21:12:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-08-23 21:12:13 -0700 |
| commit | 64e3b6b67906efd7dcd2e50e8dc561cef86e5ce0 (patch) | |
| tree | 716dc2d96178b5c78f90d73f07974d0a1dbb88ff /kernel | |
| parent | 8fead718405ab6e11125661b3a1e29a9d3fe233c (diff) | |
[PATCH] sysctl tunable for flexmmap
Create /proc/sys/vm/legacy_va_layout. If this is non-zero, the kernel
will use the old mmap layout for all tasks. it presently defaults to zero
(the new layout).
From: William Lee Irwin III <wli@holomorphy.com>
hugetlb CONFIG_SYSCTL=n fix
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sysctl.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 2c5c58279f81..4a361348038e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -42,6 +42,7 @@ #include <linux/dcache.h> #include <asm/uaccess.h> +#include <asm/processor.h> #ifdef CONFIG_ROOT_NFS #include <linux/nfs_fs.h> @@ -149,6 +150,10 @@ extern ctl_table random_table[]; extern ctl_table pty_table[]; #endif +#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT +int sysctl_legacy_va_layout; +#endif + /* /proc declarations: */ #ifdef CONFIG_PROC_FS @@ -805,6 +810,18 @@ static ctl_table vm_table[] = { .strategy = &sysctl_intvec, .extra1 = &zero, }, +#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT + { + .ctl_name = VM_LEGACY_VA_LAYOUT, + .procname = "legacy_va_layout", + .data = &sysctl_legacy_va_layout, + .maxlen = sizeof(sysctl_legacy_va_layout), + .mode = 0644, + .proc_handler = &proc_dointvec, + .strategy = &sysctl_intvec, + .extra1 = &zero, + }, +#endif { .ctl_name = 0 } }; |