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<TITLE>sane-devel: Re: reaction to a smaller buffer size</TITLE>
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<META NAME="Author" CONTENT="Oliver Neukum (Oliver.Neukum@lrz.uni-muenchen.de)">
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<META NAME="Subject" CONTENT="Re: reaction to a smaller buffer size">
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<H1>Re: reaction to a smaller buffer size</H1>
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<STRONG>From:</STRONG> Oliver Neukum (<A HREF="mailto:Oliver.Neukum@lrz.uni-muenchen.de?Subject=Re:%20reaction%20to%20a%20smaller%20buffer%20size&In-Reply-To=<00111920010700.00526@ghanima>"><EM>Oliver.Neukum@lrz.uni-muenchen.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun Nov 19 2000 - 11:01:07 PST
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<LI><STRONG>Previous message:</STRONG> <A HREF="0257.html">Henning Meier-Geinitz: "Re: Excessive Warnings from CVS build"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0256.html">abel deuring: "Re: reaction to a smaller buffer size"</A>
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<EM>> Oliver,
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> agreed, it is really not likely that we get different amount of memory
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</EM><BR>
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<EM>> after different open calls. But exactly this can be a problem: Imagine a
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</EM><BR>
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<EM>> Sane user working on an ooverloaded Linux box, who gets from time to
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</EM><BR>
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<EM>> time segfaults, and that [s]he can't reproduce this behaviuor reliably.
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</EM><BR>
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<EM>> How someone get the idea that this behaviour might be caused by a
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</EM><BR>
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<EM>> changing sanei_scsi_max_request_size?
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</EM><BR>
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<P>There must be a misunderstanding.
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<BR>
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<P>There are situations where it's almost _certain_ that the
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<BR>
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kernel _will_ give out buffers of _different_ sizes.
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<BR>
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<P>If you have one host adaptor which does scatter/gather and
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<BR>
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a second host adaptor which does no scatter/gather,
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<BR>
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the first will result in a buffer of 128K and the second a
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<BR>
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buffer of 32K.
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<BR>
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<P> Regards
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<BR>
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Oliver
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<BR>
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<P><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?Subject=Re:%20reaction%20to%20a%20smaller%20buffer%20size&In-Reply-To=<00111920010700.00526@ghanima>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0259.html">Jochen Eisinger: "Re: Patches for saned/net/scanimage/user-authorization...."</A>
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