From 5ef097dd7ba4eab8b4f0026d85fcef9fe23b821f Mon Sep 17 00:00:00 2001 From: Michael Neuling <mikey@neuling.org> Date: Fri, 5 Mar 2010 13:42:57 -0800 Subject: [PATCH] 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> --- fs/exec.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/fs/exec.c b/fs/exec.c index 6348d79401de72..da2b31dc4e1c2f 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 -- GitLab