Date: Fri, 19 Oct 2001 17:15:17 -0500 From: Mike Meyer <mwm@mired.org> To: "David E. Cross" <crossd@cs.rpi.edu> Cc: questions@freebsd.org Subject: Re: async isn't all that async? Message-ID: <15312.42485.787982.914840@guru.mired.org> In-Reply-To: <18948746@toto.iv>
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David E. Cross <crossd@cs.rpi.edu> types: > I was doing a profile recently between FreeBSD and Linux and I notice that > FreeBSD's -o async really isn't that async. Specifically the Linux operation > completed and then 15 seconds later the disk writes were committed, under > FreeBSD many of the operations seemed to be waiting on disk (I ktraced, > no mention of '-i sync' in anything... so no open options, to fcntl()s). > > Could someone shed a bit of light on this? Do you have softupdates enabled on the file system in question? If so, async in them mount request is ignored. <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/ Q: How do you make the gods laugh? A: Tell them your plans. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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