Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sat, 13 Oct 2012 21:53:09 +0800 | Subject | Re: Local DoS through write heavy I/O on CFQ & Deadline | From | Hillf Danton <> |
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Hi Alex,
On Sat, Oct 13, 2012 at 12:29 AM, Alex Bligh <alex@alex.org.uk> wrote: > Michael, > > --On 12 October 2012 16:58:39 +0200 Michal Hocko <mhocko@suse.cz> wrote: > >> Once dirty_ratio (resp. dirty_bytes) limit is hit then the process which >> writes gets throttled. If this is not the case then there is a bug in >> the throttling code. > > > I believe that is the problem.
Take a look at the "wait for writeback" problem please.
Linux 3.0+ Disk performance problem - wrong pdflush behaviour https://lkml.org/lkml/2012/10/10/412
Hillf
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