Re: blockfile access patterns logging

[Valdis . Kletnieks]

On Thu, 08 Jan 2004 15:39:08 +0100, Jens Axboe said:

> For laptops, it's often most interesting to find out _what_ process
> dirtied what data (which in turn caused bdflush to sync it), or what
> process keeps doing small reads. And block_dump does exactly that (it
> was invented for exactly that purpose :)

I submit that "what process ID did it" is even more remote from the disk
than "what inode" ;)

> I don't think you understand what Bert is looking for. He explicitly
> mentions that the machine is very idle, so he's probably looking for
> culprits that spin up the drive occasionally.

Oh, I understand very well.. Been there myself.  I'd just forgotten that
the laptop patch provided the process-ID information. ;)

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