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3.7 KiB
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<!-- received="Sun Apr 5 04:54:26 1998 PDT" -->
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<!-- sent="Sun, 5 Apr 1998 11:16:57 +0200 (MET DST)" -->
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<!-- name="Rogier Wolff" -->
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<!-- email="R.E.Wolff@BitWizard.nl" -->
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<!-- subject="Re: Mustek," -->
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<!-- id="199804050916.LAA01173@cave.BitWizard.nl" -->
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<!-- inreplyto="199804042314.PAA15402@panda.mostang.com" -->
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<title>sane-devel: Re: Mustek,</title>
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<h1>Re: Mustek,</h1>
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<b>Rogier Wolff</b> (<a href="mailto:R.E.Wolff@BitWizard.nl"><i>R.E.Wolff@BitWizard.nl</i></a>)<br>
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<i>Sun, 5 Apr 1998 11:16:57 +0200 (MET DST)</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#54">[ date ]</a><a href="index.html#54">[ thread ]</a><a href="subject.html#54">[ subject ]</a><a href="author.html#54">[ author ]</a>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0055.html">Hugo van der Kooij: "Re: Q: support for digi cameras"</a>
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<li> <b>Previous message:</b> <a href="0053.html">Peter-Paul Witta: "Q: support for digi cameras"</a>
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<li> <b>In reply to:</b> <a href="0051.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0064.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<li> <b>Reply:</b> <a href="0064.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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David Mosberger-Tang wrote:<br>
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<i>> On a related topic: if you track kernel-development, you'll notice</i><br>
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<i>> that linux 2.1.92 has support for determining the kernel's SG_BIG_BUFF</i><br>
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<i>> value by reading /proc/sys/kernel/sg-big-buff. I added code to SANE</i><br>
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<i>> to make use of this info when it exists. What's missing in the kernel</i><br>
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<i>> is the ability to resize the big buffer on demand. For example, it</i><br>
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<i>> would be nice if it were possible to do:</i><br>
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<i>> </i><br>
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<i>> echo 1048576 >/proc/sys/kernel/sg-big-buff</i><br>
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<i>> </i><br>
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<i>> and the big buffer from then on would be 1MB. I know some of you have</i><br>
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<i>> played with huge SCSI buffers. Anyone interested in folding this</i><br>
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<i>> feature into the official kernel sources? I think it would be a very</i><br>
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<i>> cool feature that would make using SANE a lot easier.</i><br>
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<p>
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Yes, I use a buffer this large, but the problem is to allocate such a<br>
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large buffer on a running system. All I've been able to do is to <br>
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allocate it at "boot time". <br>
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<p>
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What would be do-able is to take matt welsh's bigphysarea patches and<br>
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get it into the standard kernel. Then you can allocate a bigphysarea<br>
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when available, and a normal allocation fails.<br>
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<p>
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Roger. <br>
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<p>
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<pre>
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--
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If it's there and you can see it, it's REAL <a href="mailto:|___R.E.Wolff@BitWizard.nl">|___R.E.Wolff@BitWizard.nl</a> |
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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="0055.html">Hugo van der Kooij: "Re: Q: support for digi cameras"</a>
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<li> <b>Previous message:</b> <a href="0053.html">Peter-Paul Witta: "Q: support for digi cameras"</a>
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<li> <b>In reply to:</b> <a href="0051.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0064.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<li> <b>Reply:</b> <a href="0064.html">David Mosberger-Tang: "Re: Mustek,"</a>
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<!-- reply="end" -->
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</ul>
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