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Date: Fri, 3 Jul 2009 18:23:25 +0800 From: Amerigo Wang <xiyou.wangcong@...il.com> To: Changli Gao <xiaosuo@...il.com> Cc: Amerigo Wang <xiyou.wangcong@...il.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: PROPOSAL: extend pipe() to support NULL argument. On Fri, Jul 03, 2009 at 05:59:10PM +0800, Changli Gao wrote: >On Fri, Jul 3, 2009 at 5:42 PM, Amerigo Wang<xiyou.wangcong@...il.com> wrote: >>>I said: It just a special case. Fixing sendfile() won't fix everything. >> >> What do you want? Just saving an fd, isn't it? >> >> sendfile() does this but you said it's buggy, if you fix it, what is the >> rest problem? >> >You should know why Linux invented splice(2). Not all of the problems >can be solved by sendfile(2). Sure, it definitely can be seen from the interface.... > >>> >>>In fact, sendfile(2) is implemented via splice(2) infrastructure. The >>>logic is the same, and much clever than yours. Dive into its code, you >>>will find the reason why it must be blocked on outfd. >> >> >> Sure, this is done in user-space, definitely.... >> >Did you review the code of sendfile(2)? Not at all. I just wanted to show what I wanted to say, not to re-implement sendfile(2). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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