kopia lustrzana https://gitlab.com/sane-project/website
64 wiersze
2.9 KiB
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64 wiersze
2.9 KiB
HTML
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<!-- received="Wed Jun 30 05:30:40 1999 PDT" -->
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<!-- sent="Wed, 30 Jun 1999 08:36:02 -0400" -->
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<!-- name="Douglas Gilbert" -->
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<!-- email="dgilbert@interlog.com" -->
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<!-- subject="Re: problems increasing SG_BIG_BUFF" -->
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<!-- inreplyto="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>Douglas Gilbert</b> (<a href="mailto:dgilbert@interlog.com"><i>dgilbert@interlog.com</i></a>)<br>
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<i>Wed, 30 Jun 1999 08:36:02 -0400</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#248">[ date ]</a><a href="index.html#248">[ thread ]</a><a href="subject.html#248">[ subject ]</a><a href="author.html#248">[ author ]</a>
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<li> <b>Next message:</b> <a href="0249.html">Rainer Krienke: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Previous message:</b> <a href="0247.html">Douglas Gilbert: "Re: Problem with snapscan, aha1505, linux kernel 2.2.9"</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="0249.html">Rainer Krienke: "Re: problems increasing SG_BIG_BUFF"</a>
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</ul>
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abel deuring wrote:<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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<br>
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Abel,<br>
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Command queuing is already there but turned off by<br>
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default (because cdparanoia got upset when it found <br>
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it :-) ). It is demonstrated in a program called<br>
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sgq_dd512 (a "dd" variant) that can be found on<br>
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sg's home page in the utility tarball.<br>
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<p>
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See the SG_SET_COMMAND_Q ioctl(). I was not aware<br>
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that many scanners supported command queuing.<br>
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<p>
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Doug Gilbert<br>
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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="0249.html">Rainer Krienke: "Re: problems increasing SG_BIG_BUFF"</a>
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<li> <b>Previous message:</b> <a href="0247.html">Douglas Gilbert: "Re: Problem with snapscan, aha1505, linux kernel 2.2.9"</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="0249.html">Rainer Krienke: "Re: problems increasing SG_BIG_BUFF"</a>
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<!-- reply="end" -->
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</ul>
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