Re: [PATCH] fs/splice: Pull buf->ops->confirm() fromsplice_from_pipe actors

[Michał Mirosław]

On Mon, Dec 13, 2010 at 02:38:19PM +0100, Jens Axboe wrote:
> On 2010-12-12 22:23, Michał Mirosław wrote:
> > This patch pulls calls to buf->ops->confirm() from all actors passed
> > (also indirectly) to splice_from_pipe_feed().
> Why? The point of ->confirm() is to ensure that the contents are
> stable, otherwise the pages in the pipe could merely be in flight.
> It's needed if you need to actually look at the data, rather than just
> reference it.

I should have put this more clearly in the patch description:
the ->confirm() call is moved to splice_from_pipe_feed(), so that every
actor has its data guaranteed to be stable before it runs.

Best Regards,
Michał Mirosław
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