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SubjectRe: Word-at-a-time dcache name accesses (was Re: .. anybody know of any filesystems that depend on the exact VFS 'namehash' implementation?)
On Fri, Mar 02, 2012 at 04:24:11PM -0800, Linus Torvalds wrote:
> Tons of CPU's have efficient char accesses but horrible unaligned word
> accesses. Some are even outright buggy (ie at least some ARM cores)
> and load crap. Others take a fault.

To be fair, that wasn't the ARM core. That was the MEMC chip (roughly
equivalent to a northbridge). Also, there's no need for Linux to care
about that any more, since we removed the arm26 port in July 2007. As far
as I know, all arm32 cores have been coupled with memory controllers
that are functional.

--
Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."


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