[Devel] Re: [PATCH -mmotm 3/3] memcg: dirty pages instrumentation

[Trond Myklebust]

On Tue, 2010-03-02 at 14:48 +0100, Peter Zijlstra wrote: 
> unsigned long reclaimable_pages(cgroup)
> {
>   if (mem_cgroup_has_dirty_limit(cgroup))
>     return mem_cgroup_page_stat(MEMCG_NR_RECLAIM_PAGES);
>   
>   return global_page_state(NR_FILE_DIRTY) + global_page_state(NR_NFS_UNSTABLE);
> }
> 
> Which raises another question, you should probably rebase on top of
> Trond's patches, which removes BDI_RECLAIMABLE, suggesting you also
> loose MEMCG_NR_RECLAIM_PAGES in favour of the DIRTY+UNSTABLE split.
> 

I'm dropping those patches for now. The main writeback change wasn't too
favourably received by the linux-mm community so I've implemented an
alternative that only changes the NFS layer, and doesn't depend on the
DIRTY+UNSTABLE split.

Cheers
  Trond

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