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Date: Sun, 23 Nov 2014 21:30:40 +0100 From: Pieter Smith <pieter@...sman.nl> To: Josh Triplett <josh@...htriplett.org> Cc: David Miller <davem@...emloft.net>, alexander.h.duyck@...el.com, viro@...iv.linux.org.uk, ast@...mgrid.com, akpm@...ux-foundation.org, beber@...eeweb.net, catalina.mocanu@...il.com, dborkman@...hat.com, edumazet@...gle.com, ebiederm@...ssion.com, fabf@...net.be, fuse-devel@...ts.sourceforge.net, geert@...ux-m68k.org, hughd@...gle.com, iulia.manda21@...il.com, JBeulich@...e.com, bfields@...ldses.org, jlayton@...chiereds.net, linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, mcgrof@...e.com, mattst88@...il.com, mgorman@...e.de, mst@...hat.com, miklos@...redi.hu, netdev@...r.kernel.org, oleg@...hat.com, Paul.Durrant@...rix.com, paulmck@...ux.vnet.ibm.com, pefoley2@...oley.com, tgraf@...g.ch, therbert@...gle.com, willemb@...gle.com, xiaoguangrong@...ux.vnet.ibm.com, zhenglong.cai@...c.com.cn Subject: Re: [PATCH 0/6] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile) On Sun, Nov 23, 2014 at 11:43:26AM -0800, Josh Triplett wrote: > On Sun, Nov 23, 2014 at 01:46:23PM -0500, David Miller wrote: > > Truly removing sendfile/sendpage means that you can't even compile NFS > > into the tree. > > If you mean the in-kernel nfsd (CONFIG_NFSD), that already has a large > stack of "select" and "depends on", both directly and indirectly; adding > a "select SPLICE_SYSCALL" to it seems fine. (That select does need > adding, though. Pieter, you need to test-compile more than just > tinyconfig and defconfig. Try an allyesconfig with *just* splice turned > off, and make sure that compiles.) Did exacly that. Took forever on my hardware, but no problems. > Given the requirements of running a file server in the kernel, I'd > expect CONFIG_NFSD to end up with several more selects of optional > functionality in the future. It seems rather likely that the average > embedded system will be compiling out NFS. :) > > Also, this patch series compiles out splice and sendfile, including > several *users* of sendpage; it doesn't compile out the sendpage > support/infrastructure itself. > > - Josh Triplett -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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