Date: Fri, 10 Jun 2005 22:24:47 -1000 From: juli mallett <jmallett@FreeBSD.org> To: Brian Fundakowski Feldman <green@freebsd.org> Cc: cvs-src@freebsd.org, alfred@freebsd.org, cvs-all@freebsd.org, src-developers@freebsd.org Subject: Re: cvs commit: src/sys/nfsclient nfs_bio.c nfs_vfsops.c nfsargs.h nfsmount.h src/sys/sys buf.h bufobj.h src/sys/kern vfs_bio.c Message-ID: <20050611082446.GA54459@toxic.magnesium.net> In-Reply-To: <20050611064956.GC66188@green.homeunix.org> References: <200506102350.j5ANofFM008212@repoman.freebsd.org> <20050611034930.GY17867@elvis.mu.org> <20050611064956.GC66188@green.homeunix.org>
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* Brian Fundakowski Feldman <green@freebsd.org> [ Date: 2005-06-10 ] [ w.r.t. Re: cvs commit: src/sys/nfsclient nfs_bio.c nfs_vfsops.c nfsargs.h nfsmount.h src/sys/sys buf.h bufobj.h src/sys/kern vfs_bio.c ] > On Fri, Jun 10, 2005 at 08:49:30PM -0700, Alfred Perlstein wrote: > > Returning EAGAIN from a disk IO seems bogus, are you sure it makes > > sense to do that when IO_NDELAY is set? Shouldn't it just be ignored > > like other FSes do? > > Well, it's not disk IO, it's network IO. I figure if you set that > flag you should expect commensurate error return values. This is > conceivably a useful behavior, and POSIX does not forbid it, so I just > made the judgement call to not deny the functionality. > > Would you actually be surprised to get EAGAIN if you requested > non-blocking access to a file stream, ignoring the fact that it just > happens to not have been done already for other S_ISREG file streams? There's a surprisingly good email from Terry about this here: http://lists.freebsd.org/pipermail/freebsd-current/2003-April/000356.html In short, green wins.
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