Re: Syslets, Threadlets, generic AIO support, v6

[Eric Dumazet <dada1@cosmosbay.com>]

Linus Torvalds a écrit :
> On Wed, 30 May 2007, Mark Lord wrote:
> > I wonder how useful it would be to reimplement sendfile()
> > using splice(), either in glibc or inside the kernel itself?
>
> I'd like that, if only because right now we have two separate paths that 
> kind of do the same thing, and splice really is the only one that is 
> generic.
>
> I thought Jens even had some experimental patches for it. It might be 
> worth to "just do it" - there's some internal overhead, but on the other 
> hand, it's also likely the best way to make sure any issues get sorted 
> out.

Last time I played with splice(), I found a bug with readahead logic, most 
probably because nobody but me tried it before.

(corrected by Fengguang Wu in commit 9ae9d68cbf3fe0ec17c17c9ecaa2188ffb854a66 )

So yes, reimplement sendfile() should help to find last splice() bugs, and as 
a bonus it could add non blocking disk io, (O_NONBLOCK on input file -> socket)


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