On Sunday 25 March 2007 07:07, [EMAIL PROTECTED] wrote: > This would probably work well for systems without mmap(), > it is what you meant with "OS-specific"? > > Otherwise I fear that we'd miss possible modifications done via mmap(). > It may be used though as another "shortcut" check if there were no mmap()s.
On the systems that support mmap(), we can check the protection argument for the flag PROT_WRITE. If it is mapped with write, the kernel module would have to assume a write. (I don't think we want to try to walk the buffer cache in each supported system trying to find out if any of the pages were modified.) --Phil -- Phil Nelson NetBSD: http://www.NetBSD.org e-mail: [EMAIL PROTECTED] Coda: http://www.coda.cs.cmu.edu http://www.cs.wwu.edu/nelson
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