Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH 20/25] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it | Date | Thu, 12 May 2016 11:21:42 +0200 |
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On Thursday 12 May 2016 10:17:58 Catalin Marinas wrote: > On Wed, May 11, 2016 at 09:30:07PM +0200, Arnd Bergmann wrote: > > On Wednesday 11 May 2016 17:59:01 Catalin Marinas wrote: > > > > I don't think the shifts are a problem, the main downside would be > > the limit to 44 bits of file offsets (16TB files), but it's also > > unclear if that is a practical problem at all. If it is, we run > > into the same problem on all other 32-bit architectures too. > > I hope people are seriously thinking of moving to an LP64 ABI if they > have such large file offset needs.
Good point. 44 bits of file size is certainly enough for mmap() on a 32-bit task: you would only be able to map a very small fraction of the file anyway, and if you want to map larger files, and should move to 64-bit tasks long before this becomes a limitation.
Arnd
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