Messages in this thread | | | Date | Mon, 13 Mar 2006 09:41:49 -0500 | From | Mark Lord <> | Subject | Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?) |
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Marr wrote: > > Anyway, not that it really matters, but I re-did the testing with '-a0' and it > didn't help one iota. The 2.6.13 kernel on ReiserFS (without using > 'nolargeio=1' as a mount option) still takes about 4m35s to fseek 200,000 > times on that 4MB file, even with 'hdparm -a0 /dev/hda' in effect.
Does it make a difference when done on the filesystem *partition* rather than the base drive? At one time, this mattered, and it may still work that way today.
Eg. hdparm -a0 /dev/hda3 rather than hdparm -a0 /dev/hda
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