Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?)

Ulrich, what are your plans regarding fixing this?  Are you just going
to ignore it or?

Hans

Mark Lord wrote:

> 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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• References:
  • Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?
    • From: Marr <[email protected]>
  • Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?)
    • From: Marr <[email protected]>
  • Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?)
    • From: Mark Lord <[email protected]>
  • Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?)
    • From: Marr <[email protected]>
  • Re: Readahead value 128K? (was Re: Drastic Slowdown of 'fseek()' Calls From 2.4 to 2.6 -- VMM Change?)
    • From: Mark Lord <[email protected]>

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