On Tue, Mar 14, 2006 at 09:17:49PM +0800, David Xu wrote: > I know, someone will work out such a messy patch, but is it reasonable ? > why does not the fifi code suddenly work with well defined vnode interface ? > why did someone want to break the well defined FILE->vnode->fs->device > layers ? sigh.
From CVS history for sys/fs/fifofs//fifo_vnops.c: Revision 1.105 Wed Nov 17 07:30:02 2004 UTC (15 months, 3 weeks ago) by phk Make vnode bypass for fifos (read, write, poll) mandatory. Revision 1.104 Mon Nov 15 14:51:44 2004 UTC (15 months, 3 weeks ago) by phk Add file ops to fifofs so that we can bypass vnodes (and Giant) for the heavy-duty operations (read, write, poll/select, kqueue). Disabled for now, enable with "vfs.fifofs.fops=1" in loader.conf.
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