Date: Tue, 12 Nov 2002 11:11:21 -0500 (EST) From: Dan Ellard <ellard@eecs.harvard.edu> To: freebsd-fs@FreeBSD.ORG, <freebsd-hackers@FreeBSD.ORG> Subject: how to control tagged queueing? Message-ID: <Pine.BSF.4.44.0211121104530.60100-100000@bowser.eecs.harvard.edu>
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I'm experimenting with the effects of SCSI tagged queueing on file system performance. Is there any kind of global toggle somewhere in the kernel to turn tagged queueing on and off, and/or knob to limit the number of outstanding tags? Tagged queue management all seems to be done at the device level, and I haven't found hooks for controlling it at a higher level (but I thought I'd ask before running off to write something). I'm running 4.6.2p4, in case things have changed. (If there's a nicer interface in 4.7, I'll install it immediately!) Thanks, -Dan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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