From: Gerd Knorr <kraxel@bytesex.org>
To: Kernel List <linux-kernel@vger.kernel.org>
Subject: [patch] 2.5 vm bugfix
Date: Fri, 21 Mar 2003 16:18:27 +0100 [thread overview]
Message-ID: <20030321151827.GA9387@bytesex.org> (raw)
Hi,
2.5.x kernels don't look at the VM_DONTEXPAND flag when merging
multiple vmas into one. Fix below.
Gerd
--- linux-2.5.65/mm/mmap.c 2003-03-21 13:03:28.377764776 +0100
+++ linux/mm/mmap.c 2003-03-21 13:09:52.981296152 +0100
@@ -379,6 +379,8 @@
can_vma_merge_before(struct vm_area_struct *vma, unsigned long vm_flags,
struct file *file, unsigned long vm_pgoff, unsigned long size)
{
+ if ((vma->vm_flags & VM_DONTEXPAND) || (vm_flags & VM_DONTEXPAND))
+ return 0;
if (vma->vm_file == file && vma->vm_flags == vm_flags) {
if (!file)
return 1; /* anon mapping */
@@ -396,6 +398,8 @@
can_vma_merge_after(struct vm_area_struct *vma, unsigned long vm_flags,
struct file *file, unsigned long vm_pgoff)
{
+ if ((vma->vm_flags & VM_DONTEXPAND) || (vm_flags & VM_DONTEXPAND))
+ return 0;
if (vma->vm_file == file && vma->vm_flags == vm_flags) {
unsigned long vma_size;
next reply other threads:[~2003-03-21 14:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-21 15:18 Gerd Knorr [this message]
2003-03-22 0:32 ` Andrew Morton
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