From: David Miller <davem@davemloft.net>
To: stephen@networkplumber.org
Cc: willy@infradead.org, netdev@vger.kernel.org, linux-mm@kvack.org,
ikomyagin@gmail.com, sthemmin@microsoft.com
Subject: Re: [PATCH 0/2] mark some slabs as visible not mergeable
Date: Mon, 26 Feb 2018 20:13:55 -0500 (EST) [thread overview]
Message-ID: <20180226.201355.1546591469388453458.davem@davemloft.net> (raw)
In-Reply-To: <20180226134613.04edcc98@xeon-e3>
From: Stephen Hemminger <stephen@networkplumber.org>
Date: Mon, 26 Feb 2018 13:46:13 -0800
> This is ancient original iproute2 code that dumpster dives into
> slabinfo to get summary statistics on active objects.
>
> 1) open sockets (sock_inode_cache)
The sockets inuse counter from /proc/net/sockstat is really
sufficient for this.
> 2) TCP ports bound (tcp_bind_buckets) [*]
> 3) TCP time wait sockets (tw_sock_TCP) [*]
Time wait is provided by /proc/net/sockstat as well.
> 4) TCP syn sockets (request_sock_TCP) [*]
It shouldn't be too hard to fill in the last two gaps, maintaining a
counter for bind buckets and request socks, and exporting them in new
/proc/net/sockstat field.
That would be so much better than disabling a useful optimization
in the SLAB allocator.
Thank you.
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prev parent reply other threads:[~2018-02-27 1:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-24 19:04 [PATCH 0/2] mark some slabs as visible not mergeable Stephen Hemminger
2018-02-24 19:04 ` [PATCH 1/2] slab: add flag to block merging of UAPI elements Stephen Hemminger
2018-02-24 19:04 ` [PATCH 2/2] net: mark slab's used by ss as UAPI Stephen Hemminger
2018-02-25 3:34 ` kbuild test robot
2018-02-25 6:05 ` [net] ba4f5b62a2: kernel_BUG_at_net/socket.c kernel test robot
2018-02-24 21:05 ` [PATCH 0/2] mark some slabs as visible not mergeable Matthew Wilcox
2018-02-25 16:36 ` Stephen Hemminger
2018-02-26 20:15 ` David Miller
2018-02-26 21:46 ` Stephen Hemminger
2018-02-27 1:13 ` David Miller [this message]
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