Re: [RESEND][PATCH] Mark thread stack correctly in proc/<pid>/maps

From: KOSAKI Motohiro
Date: Thu Feb 02 2012 - 16:40:21 EST

extern unsigned long move_page_tables(struct vm_area_struct *vma,
diff --git a/mm/mmap.c b/mm/mmap.c
index 3f758c7..2f9f540 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -992,6 +992,9 @@ unsigned long do_mmap_pgoff(struct file *file,
unsigned long addr,
vm_flags = calc_vm_prot_bits(prot) | calc_vm_flag_bits(flags) |

+ if (flags& MAP_STACK)
+ vm_flags |= VM_STACK_FLAGS;

MAP_STACK doesn't mean auto stack expansion. Why do you turn on VM_GROWSDOWN?
Seems incorrect.

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