Re: temporarily system freeze with high I/O write to ext2 fs

[Andrew Morton]

Roy Sigurd Karlsbakk wrote:
> 
> hi all
> 
> why is it that Linux 'hangs' while doing heavy I/O operations (such as dd)
> to (and perhaps from?) ext2 file systems? I can't see the same behaivour
> when using other file systems, such as ReiserFS
> 

A partial fix for this went into 2.4.17-pre2.  What kernel are you
using?

For how long does it "hang"?   What exactly are you doing when it
occurs?

Is your disk system well-tuned?  What throughput do you get with
`hdparm -t /dev/hdXX'?

It surprises me that resierfs behaves differently...

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