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SubjectRe: [PATCH] Introduce sys_splice() system call
Jens Axboe <axboe@suse.de> wrote:
>
> > > + ret = write_one_page(page, 0);
> >
> > Still want to know why this is here??
> >
> > > +out:
> > > + if (ret < 0)
> > > + unlock_page(page);
> >
> > If write_one_page()'s call to ->writepage() failed, this will cause a
> > double unlock.
>
> Can probably be improved - can I drop write_one_page() and just unlock
> the page and regular cleaning will flush it out?
>

Of course - commit_write() will mark the page dirty and it'll get flushed
back in the normal manner. We don't need that set_page_dirty() in there
either.

But we do need some O_SYNC/S_ISSYNC handling...
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