On 04/25/2014 05:01 AM, Hugh Dickins wrote: > Er, i_mmap_mutex. > > That's what unmap_mapping_range(), and page_mkclean()'s rmap_walk, > take to iterate over the file vmas. So perhaps there's no race at all > in the unmap_mapping_range() case. And easy (I imagine) to fix the > race in Dave's racewrite.c use of MADV_DONTNEED: untested patch below. > > But exit and munmap() don't take i_mmap_mutex: perhaps they should > when encountering a VM_SHARED vma (I believe VM_SHARED should be > peculiar to having vm_file set, but test both below because I don't > want to oops in some odd corner where a special vma is set up). Hey Hugh, Do you want some testing on this? -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
