Messages in this thread | | | Date | Tue, 26 Jan 2016 23:05:34 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: mm: VM_BUG_ON_PAGE(PageTail(page)) in mbind |
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On Tue, Jan 26, 2016 at 12:49:16PM -0800, Andrew Morton wrote: > On Tue, 26 Jan 2016 22:28:29 +0200 "Kirill A. Shutemov" <kirill@shutemov.name> wrote: > > > Let's mark the VMA as VM_IO to indicate to mm core that the VMA is > > migratable. > > > > ... > > > > --- a/drivers/scsi/sg.c > > +++ b/drivers/scsi/sg.c > > @@ -1261,7 +1261,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) > > } > > > > sfp->mmap_called = 1; > > - vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; > > + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; > > vma->vm_private_data = sfp; > > vma->vm_ops = &sg_mmap_vm_ops; > > return 0; > > I'll put cc:stable on this - I don't think we recently did anything to make > this happen?
The VM_BUG_ON is new bb5b8589767a ("mm: make sure isolate_lru_page() is never called for tail page"), but I don't think it changes the picture much.
-- Kirill A. Shutemov
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