On Thu, 2007-05-31 at 12:33 +0200, Jens Axboe wrote:
> Hi,
>
> This patch removes the ->sendfile() hook from the file_operations
> structure, and replaces the sys_sendfile() mechanism to be based on
> ->splice_read() instead. There should be no functional changes.
>
> Work to be done:
>
> - The ext2 xip support needs a splice_read() implementation, currently I
> just if 0'ed out the send xip_file_sendfile(). CC'ed Carsten, who
> seems to be the author of this code.
>
> - shmem needs a splice_read() implementation. Optimistically CC'ed Hugh.
>
> - nfds: The ->rq_sendfile_ok optimization is gone for now. I can't
> determine the value of it, but I'm assuming it's there for a reason.
> Any chance this can be converted to splice, or use something else than
> ->sendfile()? CC'ed Neil.
>
> - relay: needs a splice_read() implementation. I think Tom already has
> one, CC'ed him.
>
Hi Jens,
Yeah, I have it lying around somewhere - the patch I sent you awhile
back of an initial version of splice_read() is the last work I did on
this. Basically, it worked OK but IIRC there were a couple things in
the code that needed fixing. I also modified blktrace to use splice so
I could use it for testing; I'll send a patch for that too once I get it
working again.
Anyway, that was ages ago (sometime last year ;-) so I'm going to have
to dig up the code and probably rework it a bit.
Tom
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