From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: Inconsistency in number of Unix sockets Date: Tue, 30 Jun 2009 13:29:03 +0200 Message-ID: <4A49F6FF.60608@cosmosbay.com> References: <31436f4a0906290737w7eba05a7r5e2ab96b4b2838a2@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Cc: netdev@vger.kernel.org To: David Shwatrz Return-path: Received: from gw1.cosmosbay.com ([212.99.114.194]:60425 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751869AbZF3L3Q (ORCPT ); Tue, 30 Jun 2009 07:29:16 -0400 In-Reply-To: <31436f4a0906290737w7eba05a7r5e2ab96b4b2838a2@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: David Shwatrz a écrit : > Hello, > > On kernel 2.6.29.4-167: (Fedora 11): > > Why is this inconsistency in number of Unix sockets, when running the following: > > cat /proc/net/protocols | grep UNIX > UNIX 432 986 -1 .... > > lsof -U | wc -l > 989 > > netstat --unix | wc -l > 906 > > cat /proc/net/unix | wc -l > 986 > > On which of this statistics should we rely when we want to know how > many Unix Domain sockets do we have ? There is a variable named unix_nr_socks, > but AFAIK, the patch which used it (for /proc/net/protocols ) was > reverted lately. Pick your own definition of what is "the number of unix sockets". "lsof -U | wc -l " cannot be right because of shared file descriptors (one socket shared by several processes) "netstat --unix" seems to not display some sockets (which names dont start by / or @ , like in "private/smtp") If you use "netstat --unix --all", then all sockets are displayed. > > commit 1748376b6626acf59c24e9592ac67b3fe2a0e026 > by Eric Dumazet You didnt understand this patch. Information is still available in /proc/net/protocols $ grep UNIX /proc/net/protocols UNIX 432 98 -1 NI 0 yes kernel n n n n n n n n n n n n n n n n n n n $ wc -l /proc/net/unix 99 /proc/net/unix