Messages in this thread | | | Date | Fri, 5 Aug 2011 09:43:40 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH] cfq-iosched: Add documentation about idling [V2] |
| |
On 2011-08-02 19:40, Vivek Goyal wrote: > There are always questions about why CFQ is idling on various conditions. > Recent ones is Christoph asking again why to idle on REQ_NOIDLE. His > assertion is that XFS is relying more and more on workqueues and is > concerned that CFQ idling on IO from every workqueue will impact > XFS badly. > > So he suggested that I add some more documentation about CFQ idling > and that can provide more clarity on the topic and also gives an > opprotunity to poke a hole in theory and lead to improvements. > > So here is my attempt at that. Any comments are welcome.
Applied, thanks.
-- Jens Axboe
| |