linux-kernel - Re: [PATCH 3/3] mm: oom: show unreclaimable slab info when unreclaimable slabs

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Message-ID: <alpine.DEB.2.10.1710171449000.100885@chino.kir.corp.google.com>
Date:   Tue, 17 Oct 2017 14:50:02 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Yang Shi <yang.s@...baba-inc.com>
cc:     Michal Hocko <mhocko@...nel.org>, cl@...ux.com, penberg@...nel.org,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] mm: oom: show unreclaimable slab info when unreclaimable
 slabs > user memory

On Wed, 18 Oct 2017, Yang Shi wrote:

> > > > Please simply dump statistics for all slab caches where the memory
> > > > footprint is greater than 5% of system memory.
> > > 
> > > Unconditionally? User controlable?
> > 
> > Unconditionally, it's a single line of output per slab cache and there
> > can't be that many of them if each is using >5% of memory.
> 
> So，you mean just dump the single slab cache if its size > 5% of system memory
> instead of all slab caches?
> 

Yes, this should catch occurrences of "huge unreclaimable slabs", right?