Eric Dumazet e67f88dd12 net: dont hold rtnl mutex during netlink dump callbacks ... Four years ago, Patrick made a change to hold rtnl mutex during netlink dump callbacks. I believe it was a wrong move. This slows down concurrent dumps, making good old /proc/net/ files faster than rtnetlink in some situations. This occurred to me because one "ip link show dev ..." was _very_ slow on a workload adding/removing network devices in background. All dump callbacks are able to use RCU locking now, so this patch does roughly a revert of commits : 1c2d670f36 : [RTNETLINK]: Hold rtnl_mutex during netlink dump callbacks 6313c1e099 : [RTNETLINK]: Remove unnecessary locking in dump callbacks This let writers fight for rtnl mutex and readers going full speed. It also takes care of phonet : phonet_route_get() is now called from rcu read section. I renamed it to phonet_route_get_rcu() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Remi Denis-Courmont <remi.denis-courmont@nokia.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-05-02 15:26:28 -07:00
..
Kconfig	Phonet: kill the ST-Ericsson pipe controller Kconfig	2011-03-09 11:59:33 -08:00
Makefile	Net: phonet: Makefile: Remove deprecated kbuild goal definitions	2010-11-22 08:16:14 -08:00
af_phonet.c	Phonet: return an error when packet TX fails	2011-03-09 11:59:30 -08:00
datagram.c	Phonet: hook resource routing to userspace via ioctl()'s	2010-09-15 21:31:32 -07:00
pep-gprs.c	Phonet: zero-copy aligned GPRS RX	2010-01-07 00:24:54 -08:00
pep.c	Phonet: fix aligned-mode pipe socket buffer header reserve	2011-03-15 14:55:49 -07:00
pn_dev.c	net: dont hold rtnl mutex during netlink dump callbacks	2011-05-02 15:26:28 -07:00
pn_netlink.c	net: dont hold rtnl mutex during netlink dump callbacks	2011-05-02 15:26:28 -07:00
socket.c	Phonet: convert bound sockets hash list to RCU	2011-04-14 21:32:53 -07:00
sysctl.c	sysctl net: Remove unused binary sysctl code	2009-11-12 02:05:06 -08:00