Date: Tue, 15 May 2007 11:27:09 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: freebsd-stable@freebsd.org, scrappy@freebsd.org Subject: Re: Does a pipe take a socket ... ? Message-ID: <200705151827.l4FIR9Yk007652@apollo.backplane.com> References: <200705151714.l4FHEEhH030766@lurza.secnetix.de>
next in thread | previous in thread | raw e-mail | index | archive | help
:Marc G. Fournier wrote: : > For those that remmeber the other day, I had that swzone issue, where I ran out : > of swap space? I just about hit it again today, swap was up to 99% used ... I : > was able to get a ps listing in, and there were a whack of find processes : > running ... : > : > Now, I think I know which VPS they were running in, so that isn't a problem ... : > and I suspect that the find was just part of a longer pipe ... I'm just curious : > if those pipes would happen to use up any of those sockets that are : > 'evaporating', or is this totally unrelated to sockets? : :In FreeBSD, pipe() is implemented with the socketpair(2) :system call. Every pipe uses two sockets (one for each :endpoint). : :Best regards : Oliver : :-- :Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Nuh uh. pipe() is a direct implementation... no sockets anywhere. Using socketpair() will eat sockets up, but using pipe() will not. -Matt
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200705151827.l4FIR9Yk007652>