Date: Mon, 30 May 2011 13:48:53 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Rick Macklem <rmacklem@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r222466 - head/sbin/umount Message-ID: <alpine.BSF.2.00.1105301347380.60306@fledge.watson.org> In-Reply-To: <201105292113.p4TLDrA3046886@svn.freebsd.org> References: <201105292113.p4TLDrA3046886@svn.freebsd.org>
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On Sun, 29 May 2011, Rick Macklem wrote: > Modify the umount(8) command so that it doesn't do > a sync(2) syscall before unmount(2) for the "-f" case. > This avoids a forced dismount from getting stuck for > an NFS mountpoint in sync() when the server is not > responsive. With this commit, forced dismounts should > normally work for the NFS clients, but can take up to > about 1minute to complete. I'm actually a bit confused about why umount(8) calls sync(2) at all: surely it's the responsibility of the file system, rather than the userland tool, to ensure consistency subject to file system configuration and unmount-time flags? Robert
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