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| author | Michael Neuling <mikey@neuling.org> | 2010-03-05 13:42:57 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:33 -0800 |
| commit | 5ef097dd7ba4eab8b4f0026d85fcef9fe23b821f (patch) | |
| tree | 5d2e580897795b8eae278f7548799119ac4803a0 /fs/exec.c | |
| parent | 9728e5d6e6c432ee8487c63ce6e479e2474d9945 (diff) | |
| download | lwn-5ef097dd7ba4eab8b4f0026d85fcef9fe23b821f.tar.gz lwn-5ef097dd7ba4eab8b4f0026d85fcef9fe23b821f.zip | |
exec: create initial stack independent of PAGE_SIZE
Currently we create the initial stack based on the PAGE_SIZE. This is
unnecessary.
This creates this initial stack independent of the PAGE_SIZE.
It also bumps up the number of 4k pages allocated from 20 to 32, to
align with 64K page systems.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: Helge Deller <deller@gmx.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Americo Wang <xiyou.wangcong@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/exec.c b/fs/exec.c index 6348d79401de..da2b31dc4e1c 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -556,8 +556,6 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift) return 0; } -#define EXTRA_STACK_VM_PAGES 20 /* random */ - /* * Finalizes the stack vm_area_struct. The flags and permissions are updated, * the stack is optionally relocated, and some extra space is added. @@ -632,7 +630,7 @@ int setup_arg_pages(struct linux_binprm *bprm, goto out_unlock; } - stack_expand = EXTRA_STACK_VM_PAGES * PAGE_SIZE; + stack_expand = 131072UL; /* randomly 32*4k (or 2*64k) pages */ stack_size = vma->vm_end - vma->vm_start; /* * Align this down to a page boundary as expand_stack |