netdev - Re: tcp_bind_bucket is missing from slabinfo

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Message-ID: <20180224105855.5ff93c2f@xeon-e3>
Date:   Sat, 24 Feb 2018 10:58:55 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     netdev@...r.kernel.org, linux-mm@...ck.org
Subject: Re: tcp_bind_bucket is missing from slabinfo

On Sat, 24 Feb 2018 06:35:20 -0800
Matthew Wilcox <willy@...radead.org> wrote:

> On Fri, Feb 23, 2018 at 10:50:30PM -0800, Stephen Hemminger wrote:
> > Somewhere back around 3.17 the kmem cache "tcp_bind_bucket" dropped out
> > of /proc/slabinfo. It turns out the ss command was dumpster diving
> > in slabinfo to determine the number of bound sockets and now it always
> > reports 0.
> > 
> > Not sure why, the cache is still created but it doesn't
> > show in slabinfo. Could it be some part of making slab/slub common code
> > (or network namespaces). The cache is created in tcp_init but not visible.
> > 
> > Any ideas?  
> 
> Try booting with slab_nomerge=1

Yes, thats it.