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Re: boot: ext3 fs not supported by kernel



Theodore Ts'o wrote:
> On Tue, Jun 17, 2003 at 08:51:51AM +0800, Peter Davies wrote:

>> I have also switched using_dma on (hdparm -d1 /dev/hda).
>> 
>> It is running better, but still not smoothly (lags at the console
>> and mouse movments on the desktop have decreased to <1 - 2 seconds).
> 
> Hmm... have you checked to make sure you have the appropriate
> chipset-specific IDE DMA support enabled?  This can make a difference.
> 
> I generally set CONFIG_IDEDMA_PCI_AUTO to make sure that the DMA
> settings are automatically set to the correct values.  (I'm not an
> expert on hdparm to set DMA/Ultra-DMA settings, but I'm not convinced
> -d1 is sufficiently to completely set up the DMA settings correctly.)
> So I prefer to let the kernel set everythign up for my correctly.

Well, this would mean to recompile the kernel, which shouldn't be
necessary IMO.

Usually the following line gives me maximum performance:

hdparm -d1 -c3 -m16 -u1 -a64 -A1 (and possibly -W1, but it could be
dangerous especially wiht journalled FS).

Juri




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