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
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acpi	Fix common misspellings	2011-03-31 11:26:23 -03:00
asm-generic	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
crypto
drm	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
keys	libceph: Create a new key type "ceph".	2011-03-29 12:11:24 -07:00
linux	ethtool: Call ethtool's get/set_settings callbacks with cleaned data	2011-04-29 14:01:30 -07:00
math-emu
media	Fix common misspellings	2011-03-31 11:26:23 -03:00
mtd
net	net: dont hold rtnl mutex during netlink dump callbacks	2011-05-02 15:26:28 -07:00
pcmcia	pcmcia: re-enable Zoomed Video support	2011-02-20 12:47:34 +01:00
rdma	ethtool: Call ethtool's get/set_settings callbacks with cleaned data	2011-04-29 14:01:30 -07:00
rxrpc	Fix common misspellings	2011-03-31 11:26:23 -03:00
scsi	Fix common misspellings	2011-03-31 11:26:23 -03:00
sound	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
staging	[media] Altera FPGA firmware download module	2011-03-21 20:32:16 -03:00
target	Fix common misspellings	2011-03-31 11:26:23 -03:00
trace	Merge branch 'for-linus-unmerged' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	2011-03-28 15:31:05 -07:00
video	Fix common misspellings	2011-03-31 11:26:23 -03:00
xen	Fix common misspellings	2011-03-31 11:26:23 -03:00
Kbuild