linux

History

Eric Dumazet 54764bb647 ipv4: Restore old dst_free() behavior. commit `404e0a8b6a` (net: ipv4: fix RCU races on dst refcounts) tried to solve a race but added a problem at device/fib dismantle time : We really want to call dst_free() as soon as possible, even if sockets still have dst in their cache. dst_release() calls in free_fib_info_rcu() are not welcomed. Root of the problem was that now we also cache output routes (in nh_rth_output), we must use call_rcu() instead of call_rcu_bh() in rt_free(), because output route lookups are done in process context. Based on feedback and initial patch from David Miller (adding another call_rcu_bh() call in fib, but it appears it was not the right fix) I left the inet_sk_rx_dst_set() helper and added __rcu attributes to nh_rth_output and nh_rth_input to better document what is going on in this code. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2012-07-31 14:41:38 -07:00
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netfilter	…
Kconfig	…
Makefile	…
README	…
TODO	…
af_decnet.c	…
dn_dev.c	…
dn_fib.c	…
dn_neigh.c	…
dn_nsp_in.c	…
dn_nsp_out.c	…
dn_route.c	ipv4: Restore old dst_free() behavior.	2012-07-31 14:41:38 -07:00
dn_rules.c	…
dn_table.c	…
dn_timer.c	…
sysctl_net_decnet.c	…

README

                       Linux DECnet Project
                      ======================

The documentation for this kernel subsystem is available in the
Documentation/networking subdirectory of this distribution and also
on line at http://www.chygwyn.com/DECnet/

Steve Whitehouse <SteveW@ACM.org>