Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [RFC] [PATCH -mm 0/2] memcg: per cgroup dirty_ratio | Date | Wed, 24 Sep 2008 15:59:01 +0900 (JST) |
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> > We don't have any motivation of its interface change. > > We are seeing problems where we are generating a lot of dirty memory > from asynchronous background writes while more important traffic is > operating with DIRECT_IO. The DIRECT_IO traffic will incur high > latency spikes as the pdflush hits the background threshold and tries > to write a lot of dirty buffers at once. > > What we want to do is lower the background threshold low enough so > that we don't end up writing a lot of data at one time. As systems get > more and more memory this is and will become difficult. 1% of system > RAM could tie up a disk.
yup. sorry, I choosed bad word at my last mail. it caused your confusion. I only disagreed vm_dirty_KB.
I agreed with fine graind vm_dirty_ratio.
Thanks.
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