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Message-ID: <x49tx3zpsfg.fsf@segfault.boston.devel.redhat.com> Date: Mon, 22 Sep 2014 11:48:35 -0400 From: Jeff Moyer <jmoyer@...hat.com> To: Christoph Hellwig <hch@...radead.org> Cc: "Elliott\, Robert \(Server Storage\)" <Elliott@...com>, Andreas Dilger <adilger@...ger.ca>, Milosz Tanski <milosz@...in.com>, "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>, "linux-fsdevel\@vger.kernel.org" <linux-fsdevel@...r.kernel.org>, "linux-aio\@kvack.org" <linux-aio@...ck.org>, Mel Gorman <mgorman@...e.de>, Volker Lendecke <Volker.Lendecke@...net.de>, Tejun Heo <tj@...nel.org> Subject: Re: [RFC PATCH 0/7] Non-blockling buffered fs read (page cache only) Christoph Hellwig <hch@...radead.org> writes: > Without the atomic WRITE SCATTERED use case adding the syscalls seems > rather pointless, and I'd really avoid blocking nice software only > features like the per-I/O nonblock flag (and the similarly trivial > per-I/O sync option I have a prototype for) on it. Andreas and Zach pointed out that the scatter/gather system calls also help network file systems. I'm not yet sure how much work it would be, but it certainly seems worth considering readx/writex (or whatever we want to call them) to avoid needlessly adding a ton of system calls. Cheers, Jeff -- 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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