Messages in this thread | | | Date | Tue, 13 May 2003 18:10:22 -0700 | From | Andrew Morton <> | Subject | Re: Race between vmtruncate and mapped areas? |
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Dave McCracken <dmccr@us.ibm.com> wrote: > > Actually it does fix it. I added code in vmtruncate_list() to do a > down_write(&vma->vm_mm->mmap_sem) around the zap_page_range(), and the > problem went away. It serializes against any outstanding page faults on a > particular page table. New faults will see that the page is no longer in > the file and fail with SIGBUS. Andrew's test case stopped failing. > > I've attached the patch so you can see what I did. > > Can anyone think of any gotchas to this solution?
mmap_sem nests outside i_shared_sem. - 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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