Re: [RFC] VM statistics to gather

[Marcelo Tosatti <marcelo@conectiva.com.br>]

On Tue, 26 Jun 2001, Marcelo Tosatti wrote:

> 
> On Tue, 26 Jun 2001, Andrew Morton wrote:
> 
> > Rik van Riel wrote:
> > > 
> > > Hi,
> > > 
> > > I am starting the process of adding more detailed instrumentation
> > > to the VM subsystem and am wondering which statistics to add.
> > > A quick start of things to measure are below, but I've probably
> > > missed some things. Comments are welcome ...
> > 
> > Neat.
> > 
> > - bdflush wakeups
> > - pages written via page_launder's writepage by kswapd
> > - pages written via page_launder's writepage by non-PF_MEMALLOC
> >   tasks.  (ext3 has an interest in this because of nasty cross-fs
> >   reentrancy and journal overflow problems with writepage)
> 
> Does ext3 call page_launder() with __GFP_IO ? 
> 
> If it does not (which I believe so), page_launder() without PF_MEMALLOC
> never happens. 

s/page_launder()/page_launder() without PF_MEMALLOC/ 

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