Messages in this thread | | | Date | Tue, 3 Oct 2017 11:40:28 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH v4 4/5] cramfs: add mmap support |
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On Tue, 3 Oct 2017, Christoph Hellwig wrote:
> On Tue, Oct 03, 2017 at 11:30:50AM -0400, Nicolas Pitre wrote: > > Unless you have a better scheme altogether to suggest of course, given > > the existing constraints. > > I still can't understand why this convoluted fault path that finds > vma, attempts with all kinds of races and then tries to update things > like vm_ops is even nessecary. > > We have direct mappings of physical address perfectly working in the > DAX code (even with write support!) or in drivers using remap_pfn_range > so a really good explanation why neither scheme can be used is needed > first.
I provided that explanation several times by now in my cover letter. And separately even to you directly at least once. What else should I do?
Nicolas
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