[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] VM_FOREIGN could be set into direct_remap_pfn_range()?
>>> Wei Kong <weikong.cn@xxxxxxxxx> 10.11.09 05:48 >>> >Now we encounter a EFAULT in get_user_pages() when xm save on old >ocfs2-1.4.1 fs. >Due to in xc_domain_save got VM_IO when mmap and IOCTL_PRIVCMD_MMAPBATCH, >but not VM_FOREIGN, >but old ocfs2-1.4.1 has get_user_pages() when do write. > >I don't know is there any side effect if I set VM_FOREIGN for vm_flags in >direct_remap_pfn_range(). Yes - VM_FOREIGN implies that vma->vm_private_data points to an array of struct page *, providing the pages for the vma. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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