Re: CFQ Idle class slowing down everything?

[Phillip Susi]

Thomas Guyot-Sionnest wrote:
> On 14/10/08 03:18 PM, Andrew Morton wrote:
> > > When "idle", the slave do mostly random writes: about 15 rtps and 200
> > > wtps. For testing I ended up running dd to read files from disk to
> > > /dev/null while avoiding the system cache (had 42GB of data to read

Just thought I would point out that dd is, in fact, dirtying the buffer 
cache since you don't pass flag=direct.

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