Re: [RFC 4/4] mm: Enhance per process reclaim

[Minchan Kim <minchan@kernel.org>]

Hey Michael,

On Tue, Apr 02, 2013 at 03:25:25PM +0200, Michael Kerrisk wrote:
> Minchan,
> 
> On Mon, Mar 25, 2013 at 7:21 AM, Minchan Kim <minchan@kernel.org> wrote:
> >
> > Some pages could be shared by several processes. (ex, libc)
> > In case of that, it's too bad to reclaim them from the beginnig.
> >
> > This patch causes VM to keep them on memory until last task
> > try to reclaim them so shared pages will be reclaimed only if
> > all of task has gone swapping out.
> >
> > This feature doesn't handle non-linear mapping on ramfs because
> > it's very time-consuming and doesn't make sure of reclaiming and
> > not common.
> 
> Against what tree does this patch apply? I've tries various trees,
> including MMOTM of 26 March, and encounter this error:
> 
>   CC      mm/ksm.o
> mm/ksm.c: In function a??try_to_unmap_ksma??:
> mm/ksm.c:1970:32: error: a??vmaa?? undeclared (first use in this function)
> mm/ksm.c:1970:32: note: each undeclared identifier is reported only
> once for each function it appears in
> make[1]: *** [mm/ksm.o] Error 1
> make: *** [mm] Error 2

I did it based on mmotm-2013-03-22-15-21 and you found build problem.
Could you apply below patch? I will fix up below in next spin.
Thanks for the testing!