> Wouldn't that confuse concurrent readers? > > Could it be an option to make it safe for the fault handler to > temporarily drop the mmap_sem read lock given that some conditions TBD > are met? > In that case it can retake the mmap_sem write lock, do the VMA flags > modifications, downgrade and do the pte modifications using a helper, or > even use remap_pfn_range() during the time the write lock is held? If we return NOPAGE_REFAULT, then yes, we can drop the mmap sem, though I 'm not sure we need that... Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] 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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