Messages in this thread |  | | Date | Wed, 17 Oct 2001 09:36:04 +0200 (CEST) | From | Kamil Iskra <> | Subject | Poor floppy performance in kernel 2.4.10 |
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Hi,
Since kernel 2.4.10, I observe a rather poor performance of the good old floppy drive. It used to work find in kernel 2.4.9. Kernel 2.4.10 broke it, and 2.4.12 did not fix it. I access my floppy using mtools-3.9.7-4 as found in RH 7.1.
Not knowing anything about the kernel internals, I would say that the floppy driver does not do any caching anymore. With kernel 2.4.9, "mdir" of a standard 1.44 MB, completely empty floppy disk takes about 1 second for the first invocation, and next to nothing for the subsequent ones. >From 2.4.10 on, it takes over 2 seconds every time. Writing a 30 KB file with 2.4.9 takes below 3 seconds, with >=2.4.10 it's over 6 seconds.
Maybe I should just keep quiet and be happy that it works at all, after all floppies are rarely used nowadays, but letting such a performance degradation go unreported is just beyond me :-).
Regards,
-- Kamil Iskra http://www.science.uva.nl/~kamil/ Section Computational Science, Faculty of Science, Universiteit van Amsterdam kamil@science.uva.nl tel. +31 20 525 75 35 fax. +31 20 525 74 90 Kruislaan 403 room F.202 1098 SJ Amsterdam The Netherlands
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