Re: [RFC][PATCH 2/9] deadlock prevention core

[Rik van Riel]

Daniel Phillips wrote:
> Andrew Morton wrote:
> > Daniel Phillips <phillips@xxxxxxxxxx> wrote:
> > > What happened to the case where we just fill memory full of dirty file
> > > pages backed by a remote disk?
> >
> > Processes which are dirtying those pages throttle at
> > /proc/sys/vm/dirty_ratio% of memory dirty.  So it is not possible to 
> > "fill"
> > memory with dirty pages.  If the amount of physical memory which is dirty
> > exceeds 40%: bug.

> So we make 400 MB of a 1 GB system unavailable for write caching just to
> get around the network receive starvation issue?
>
> What happens if some in kernel user grabs 68% of kernel memory to do some
> very important thing, does this starvation avoidance scheme still work?

Also think about eg. scientific calculations, or anonymous memory.

People want to be able to use a larger percentage of their memory
for dirty data, without swapping...

--
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