Messages in this thread Patch in this message | | | From | Paolo 'Blaisorblade' Giarrusso <> | Subject | [PATCH RFP-V4 08/13] RFP prot support: support private vma for MAP_POPULATE | Date | Sat, 26 Aug 2006 19:42:36 +0200 |
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From: Ingo Molnar <mingo@elte.hu>
Fix mmap(MAP_POPULATE | MAP_PRIVATE). We don't need the VMA to be shared if we don't rearrange pages around. And it's trivial to do.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> ---
mm/fremap.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/mm/fremap.c b/mm/fremap.c index e62dc15..b1db410 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -191,9 +191,6 @@ retry: if (!vma) goto out_unlock; - if (!(vma->vm_flags & VM_SHARED)) - goto out_unlock; - if (!vma->vm_ops || !vma->vm_ops->populate) goto out_unlock; @@ -218,6 +215,8 @@ retry: /* Must set VM_NONLINEAR before any pages are populated. */ if (pgoff != linear_page_index(vma, start) && !(vma->vm_flags & VM_NONLINEAR)) { + if (!(vma->vm_flags & VM_SHARED)) + goto out_unlock; if (!has_write_lock) { up_read(&mm->mmap_sem); down_write(&mm->mmap_sem); @@ -236,6 +235,8 @@ retry: if (pgprot_val(pgprot) != pgprot_val(vma->vm_page_prot) && !(vma->vm_flags & VM_MANYPROTS)) { + if (!(vma->vm_flags & VM_SHARED)) + goto out_unlock; if (!has_write_lock) { up_read(&mm->mmap_sem); down_write(&mm->mmap_sem); Chiacchiera con i tuoi amici in tempo reale! http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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