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<!-- received="Tue Mar 31 22:08:27 1998 PST" -->
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<!-- sent="Tue, 31 Mar 1998 10:59:00 +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: Linux Sense buffer (was: sane 0.71 and microtek E3)" -->
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<!-- id="199803310859.KAA01314@cave.BitWizard.nl" -->
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<!-- inreplyto="199803310525.VAA02893@panda.mostang.com" -->
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<title>sane-devel: Re: Linux Sense buffer (was: sane 0.71 and microtek E3)</title>
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<h1>Re: Linux Sense buffer (was: sane 0.71 and microtek E3)</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>Tue, 31 Mar 1998 10:59:00 +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#226">[ date ]</a><a href="index.html#226">[ thread ]</a><a href="subject.html#226">[ subject ]</a><a href="author.html#226">[ author ]</a>
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<li> <b>Next message:</b> <a href="0227.html">Hugo van der Kooij: "Re: Patch to 0.71 spec file"</a>
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<li> <b>Previous message:</b> <a href="0225.html">Rogier Wolff: "Re: Linux Sense buffer (was: sane 0.71 and microtek E3)"</a>
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<li> <b>In reply to:</b> <a href="0208.html">David Mosberger-Tang: "Re: Linux Sense buffer (was: sane 0.71 and microtek E3)"</a>
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David Mosberger-Tang wrote:<br>
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<i>> But I agree it's bad taste to ship pre-compiled binaries assuming a</i><br>
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<i>> 128KB kernel buffer. The real problem is that the Linux kernel</i><br>
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<i>> doesn't allow to determine what the limit is. I'll see whether we</i><br>
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<i>> could have that fixed for Linux 2.2.</i><br>
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<p>
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David, I've been thinking about this. There is a possibility. <br>
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<p>
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1) (Implemented for my standalone tamarack scan-driver). A -buf option<br>
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that allows the user to select the buffer size to be used at runtime. <br>
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(I've got a "decent" kernel right now, but the last half year I've been<br>
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running a kernel without the increased buffer size, and had to pass the<br>
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-buf 32000 every time... ;-)<br>
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<p>
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2) (not implemented yet) Simply try with a large buffer, and if you<br>
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get "ENOMEM", reduce the buffer size automatically.<br>
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<p>
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<p>
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Roger. <br>
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<p>
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P.S. "large buffer" in my kernel means 1Mb.<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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</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="0227.html">Hugo van der Kooij: "Re: Patch to 0.71 spec file"</a>
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<li> <b>Previous message:</b> <a href="0225.html">Rogier Wolff: "Re: Linux Sense buffer (was: sane 0.71 and microtek E3)"</a>
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<li> <b>In reply to:</b> <a href="0208.html">David Mosberger-Tang: "Re: Linux Sense buffer (was: sane 0.71 and microtek E3)"</a>
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</ul>
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