Date: Tue, 9 Apr 2002 15:06:19 -0400 (EDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Dag-Erling Smorgrav <des@ofug.org> Cc: current@freebsd.org Subject: Re: LOOKUP_SHARED is default now Message-ID: <20020409150239.B38158-100000@mail.chesapeake.net> In-Reply-To: <xzpelhp3y7n.fsf@flood.ping.uio.no>
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On 9 Apr 2002, Dag-Erling Smorgrav wrote: > > Considering that neither LOOKUP_SHARED nor LOOKUP_EXCLUSIVE is > documented anywhere, could you enlighten us as to what, exactly, they > do? > Right, sorry. There was some minimal discussion about this on arch quite a while ago. Basically, it allows namei to return leafs locked with shared locks instead of exclusive locks when a flag is set. This not only reduces contention, but also the number of exclusive locks that are floating around in the system. Jeff To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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