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<!-- received="Wed Jun 30 05:46:11 1999 PDT" -->
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<!-- sent="Wed, 30 Jun 1999 14:47:11 +0200" -->
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<!-- name="Rainer Krienke" -->
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<!-- email="krienke@uni-koblenz.de" -->
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<!-- subject="Re: problems increasing SG_BIG_BUFF" -->
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<title>sane-devel: Re: problems increasing SG_BIG_BUFF</title>
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<h1>Re: problems increasing SG_BIG_BUFF</h1>
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<b>Rainer Krienke</b> (<a href="mailto:krienke@uni-koblenz.de"><i>krienke@uni-koblenz.de</i></a>)<br>
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<i>Wed, 30 Jun 1999 14:47:11 +0200</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#249">[ date ]</a><a href="index.html#249">[ thread ]</a><a href="subject.html#249">[ subject ]</a><a href="author.html#249">[ author ]</a>
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<li> <b>Next message:</b> <a href="0250.html">abel deuring: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Previous message:</b> <a href="0248.html">Douglas Gilbert: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Maybe in reply to:</b> <a href="0047.html">Andreas Buesching: "problems increasing SG_BIG_BUFF"</a>
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<li> <b>Next in thread:</b> <a href="0250.html">abel deuring: "Re: problems increasing SG_BIG_BUFF"</a>
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</ul>
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Douglas Gilbert wrote:<br>
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<i>> </i><br>
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<i>> abel deuring wrote:</i><br>
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<i>> ></i><br>
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<i>> > Hi all!</i><br>
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<i>> ></i><br>
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<i>> ></i><br>
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<i>> > This suggests that most if not all scanner carriage stops can be avoided</i><br>
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<i>> > if consecutive reads commands are sent to the scanner as soon as</i><br>
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<i>> > possible after the data from the previous command has been read in.</i><br>
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<i>> ></i><br>
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<i>> > Doug, what do you think about adding ioctl-calls to the SG driver which</i><br>
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<i>> > implement queueing of asynchrounous SCSI commands?</i><br>
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<i>> </i><br>
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<i>> Abel,</i><br>
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<i>> Command queuing is already there but turned off by</i><br>
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<i>> default (because cdparanoia got upset when it found</i><br>
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<i>> it :-) ). It is demonstrated in a program called</i><br>
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<i>> sgq_dd512 (a "dd" variant) that can be found on</i><br>
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<i>> sg's home page in the utility tarball.</i><br>
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<i>> </i><br>
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<i>> See the SG_SET_COMMAND_Q ioctl(). I was not aware</i><br>
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<i>> that many scanners supported command queuing.</i><br>
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<i>> </i><br>
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<i>> Doug Gilbert</i><br>
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<i>> </i><br>
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<i>> --</i><br>
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<i>> Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a></i><br>
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<i>> To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a></i><br>
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<p>
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<p>
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Does this mean, that I might just enable command queue tagging,<br>
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recompile the kernel and possibly sane and it should work? If yes, where<br>
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can I enable it?<br>
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<p>
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Thanks Rainer<br>
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<pre>
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--
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---------------------------------------------------------------------
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Rainer Krienke <a href="mailto:krienke@uni-koblenz.de">krienke@uni-koblenz.de</a>
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Universitaet Koblenz, <a href="http://www.uni-koblenz.de/~krienke">http://www.uni-koblenz.de/~krienke</a>
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Rechenzentrum, Voice: +49 261 287 - 1312
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Rheinau 1, 56075 Koblenz, Germany Fax: +49 261 287 - 1355
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---------------------------------------------------------------------
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0250.html">abel deuring: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Previous message:</b> <a href="0248.html">Douglas Gilbert: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Maybe in reply to:</b> <a href="0047.html">Andreas Buesching: "problems increasing SG_BIG_BUFF"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0250.html">abel deuring: "Re: problems increasing SG_BIG_BUFF"</a>
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<!-- reply="end" -->
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</ul>
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