[lkml]   [2001]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectPoor floppy performance in kernel 2.4.10


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 :-).


Kamil Iskra
Section Computational Science, Faculty of Science, Universiteit van Amsterdam tel. +31 20 525 75 35 fax. +31 20 525 74 90
Kruislaan 403 room F.202 1098 SJ Amsterdam The Netherlands

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:08    [W:0.117 / U:1.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site