Messages in this thread | | | Date | Tue, 28 Oct 2008 14:07:45 -0400 | From | Phillip Susi <> | Subject | Re: CFQ Idle class slowing down everything? |
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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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