Ilya Dryomov 6d7fdb0ab3 Revert "libceph: use memalloc flags for net IO" ... This reverts commit 89baaa570a. Dirty page throttling should be sufficient for us in the general case so there is no need to use __GFP_MEMALLOC - it would be needed only in the swap-over-rbd case, which we currently don't support. (It would probably take approximately the commit that is being reverted to add that support, but we would also need the "swap" option to distinguish from the general case and make sure swap ceph_client-s aren't shared with anything else.) See ceph-devel threads [1] and [2] for the details of why enabling pfmemalloc reserves for all cases is a bad thing. On top of potential system lockups related to drained emergency reserves, this turned out to cause ceph lockups in case peers are on the same host and communicating via loopback due to sk_filter() dropping pfmemalloc skbs on the receiving side because the receiving loopback socket is not tagged with SOCK_MEMALLOC. [1] "SOCK_MEMALLOC vs loopback" http://www.spinics.net/lists/ceph-devel/msg22998.html [2] "[PATCH] libceph: don't set memalloc flags in loopback case" http://www.spinics.net/lists/ceph-devel/msg23392.html Conflicts: net/ceph/messenger.c [ context: tcp_nodelay option ] Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: Mel Gorman <mgorman@suse.de> Cc: Sage Weil <sage@redhat.com> Cc: stable@vger.kernel.org # 3.18+, needs backporting Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Acked-by: Mike Christie <michaelc@cs.wisc.edu> Acked-by: Mel Gorman <mgorman@suse.de>		2015-04-07 19:08:35 +03:00
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appletalk
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ceph	Revert "libceph: use memalloc flags for net IO"	2015-04-07 19:08:35 +03:00
core	ipv6: protect skb->sk accesses from recursive dereference inside the stack	2015-04-06 16:12:49 -04:00
dcb
dccp
decnet	net: move fib_rules_unregister() under rtnl lock	2015-04-02 20:52:34 -04:00
dns_resolver
dsa	net: dsa: fix filling routing table from OF description	2015-04-06 17:31:37 -04:00
ethernet
hsr
ieee802154
ipv4	net: move fib_rules_unregister() under rtnl lock	2015-04-02 20:52:34 -04:00
ipv6	ipv6: protect skb->sk accesses from recursive dereference inside the stack	2015-04-06 16:12:49 -04:00
ipx
irda
iucv
key
l2tp	l2tp: unregister l2tp_net_ops on failure path	2015-04-06 16:53:02 -04:00
lapb
llc
mac80211
mac802154
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netfilter
netlabel
netlink
netrom
nfc
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