Re: [PATCH] memcg: add interface to specify thresholds of vmpressure

[Minchan Kim <minchan@kernel.org>]

On Wed, Jun 26, 2013 at 04:50:32PM +0900, Kyungmin Park wrote:
> On Wed, Jun 26, 2013 at 4:39 PM, Minchan Kim <minchan@kernel.org> wrote:
> > On Sat, Jun 22, 2013 at 04:34:34PM +0900, Hyunhee Kim wrote:
> >> Memory pressure is calculated based on scanned/reclaimed ratio. The higher
> >> the value, the more number unsuccessful reclaims there were. These thresholds
> >> can be specified when each event is registered by writing it next to the
> >> string of level. Default value is 60 for "medium" and 95 for "critical"
> >>
> >> Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com>
> >> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> >
> > As I mentioned eariler thread, it's not a good idea to expose each level's
> > raw value to user space. If it's a problem, please fix default vaule and
> > send a patch with number to convince us although I'm not sure we can get
> > a stable number.
> that's reason to send this patch, can we make a reasonable value to
> cover all cases?
> which number are satified for all person. I really wonder it.

Then, I really wonder how we decide values we have to pass.
IOW, how could admin tune the system with any values?


> 
> Thank you,
> Kyungmin Park
> 
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-- 
Kind regards,
Minchan Kim

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