Re: [patch] remove redundant iov segment check

[Zach Brown]

> Maybe we should create another internal generic_file_aio_read/write
> for in-core function? fs/read_write.c and fs/aio.c are not module-able
> and the check is already there.  For external module, we can do the
> check and then calls down to the internal one.

Maybe.  I'd rather see fewer moving parts here, not more.

> I hate to see iov is being walked multiple times ....

Indeed, hence the desire to walk it once and pass down a summary of the
results in an explicit struct.  The patch in this thread removes one
redundancy, but there are many.  I think I counted 6 iovec walks in some
path?  I can't remember which.  I'd rather tackle them all in one go.

- z
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