From: William Lee Irwin III As ->vm_private_data is used as a cursor for swapout of VM_NONLINEAR vmas, the check for NULL ->vm_private_data or VM_RESERVED is too strict, and should allow VM_NONLINEAR vmas with non-NULL ->vm_private_data. This fixes an issue on 2.6.7-mm5 where system calls to remap_file_pages() spuriously failed while under memory pressure. Signed-off-by: Andrew Morton --- 25-akpm/mm/fremap.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletion(-) diff -puN mm/fremap.c~spurious-remap_file_pages-einval mm/fremap.c --- 25/mm/fremap.c~spurious-remap_file_pages-einval 2004-07-04 21:36:10.652411680 -0700 +++ 25-akpm/mm/fremap.c 2004-07-04 21:36:10.656411072 -0700 @@ -194,7 +194,8 @@ asmlinkage long sys_remap_file_pages(uns * or VM_LOCKED, but VM_LOCKED could be revoked later on). */ if (vma && (vma->vm_flags & VM_SHARED) && - (!vma->vm_private_data || (vma->vm_flags & VM_RESERVED)) && + (!vma->vm_private_data || + (vma->vm_flags & (VM_NONLINEAR|VM_RESERVED))) && vma->vm_ops && vma->vm_ops->populate && end > start && start >= vma->vm_start && end <= vma->vm_end) { _