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<!-- name="Andreas Beck" -->
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<title>sane-devel: Re: SG_BIG_BUFF, glibc 2.1 weirdness ...</title>
<h1>Re: SG_BIG_BUFF, glibc 2.1 weirdness ...</h1>
<b>Andreas Beck</b> (<a href="mailto:becka@rz.uni-duesseldorf.de"><i>becka@rz.uni-duesseldorf.de</i></a>)<br>
<i>Sun, 15 Aug 1999 21:05:56 +0200</i>
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Hi !<br>
<p>
<i>&gt; &gt; Hi folks. I just went almost mad tracking a very strange problem with sane</i><br>
<i>&gt; &gt; 1.0.0, kernel 2.2.5 and glibc 2.1. I do not know, if it is fixed in 1.0.1.</i><br>
<i>&gt; &gt; If so, please disregard this mail.</i><br>
<i>&gt; I run linux-2.2.5/x86 and sane-1.0.1 (SuSE-6.1)</i><br>
<i>&gt; after I changed the SG_BIG_BUFF to 128K in both sg.h files and recompiled the</i><br>
<i>&gt; kernel and sane everything works fine!</i><br>
<p>
Yes. The both is the trick. I missed the second one, as I'm accustomed to<br>
glibc. We should at least deal gracefully with the condition, as it as well<br>
applies to binary distributions, that have been compiled on a machine with<br>
SG_BIG_BUFF unmodified and that run on one with a modified BIG_BUFF.<br>
<p>
<i>&gt; In the manpage sane-scsi there is written:</i><br>
<i>&gt; XX Unless a system is seriously</i><br>
<i>&gt; XX short on memory, it is recommended to increase this value</i><br>
<i>&gt; XX to the maximum legal value of 128*1024-512=130560 bytes.</i><br>
<p>
Interesting. Full 128k work for me as well and the sg-docs say that's what<br>
it should be.<br>
<p>
<i>&gt; &gt; Glibc installs its _own_ scsi.h and sg.h, which are different from the</i><br>
<i>&gt; &gt; kernel. Thus is you only edit sg.h from the Linux subdirectory you get very</i><br>
<i>&gt; &gt; very weird behaviour:</i><br>
<p>
<i>&gt; This is something that should be changed in ther kernel surces/glic.</i><br>
<p>
I'll take care for a graceful handling of the condition as well as support<br>
for the new sg driver in 2.2.6 and up.<br>
<p>
CU, Andy<br>
<p>
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--
= Andreas Beck | Email : &lt;<a href="mailto:andreas.beck@ggi-project.org">andreas.beck@ggi-project.org</a>&gt; =
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