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Re: write alignment matters?
> You have to use multiple of the sector size here (usually 512 bytes,
> but can be 4k now) so I don't find it unreasonable to also expect the
> buffer to be aligned on the machine's natural integer size.
If the interface were being designed now, I wouldn't either.
But the interface is much older than that, and, even if it's not
codified, there's a lot of history behind the notion that userland
alignment of write() buffers affects, at most, performance, to the
point where I consider it part of the interface.
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