Alexander Duyck ffde7328a3 net: Split netdev_alloc_frag into __alloc_page_frag and add __napi_alloc_frag ... This patch splits the netdev_alloc_frag function up so that it can be used on one of two page frag pools instead of being fixed on the netdev_alloc_cache. By doing this we can add a NAPI specific function __napi_alloc_frag that accesses a pool that is only used from softirq context. The advantage to this is that we do not need to call local_irq_save/restore which can be a significant savings. I also took the opportunity to refactor the core bits that were placed in __alloc_page_frag. First I updated the allocation to do either a 32K allocation or an order 0 page. This is based on the changes in commmit d9b2938aa where it was found that latencies could be reduced in case of failures. Then I also rewrote the logic to work from the end of the page to the start. By doing this the size value doesn't have to be used unless we have run out of space for page fragments. Finally I cleaned up the atomic bits so that we just do an atomic_sub_and_test and if that returns true then we set the page->_count via an atomic_set. This way we can remove the extra conditional for the atomic_read since it would have led to an atomic_inc in the case of success anyway. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-12-10 13:31:57 -05:00
..
datagram.c	skb_copy_datagram_iovec() can die	2014-12-09 16:29:11 -05:00
dev_addr_lists.c	net: fix spelling for synchronized	2014-11-18 15:26:32 -05:00
dev_ioctl.c	dev_ioctl: use sizeof(x) instead of sizeof x	2014-11-18 15:27:32 -05:00
dev.c	net: avoid to call skb_queue_len again	2014-12-09 17:03:19 -05:00
drop_monitor.c
dst.c	dst: no need to take reference on DST_NOCACHE dsts	2014-12-09 16:08:17 -05:00
ethtool.c	ethtool: Support for configurable RSS hash function	2014-12-08 21:07:10 -05:00
fib_rules.c
filter.c	net: sock: allow eBPF programs to be attached to sockets	2014-12-05 21:47:32 -08:00
flow_dissector.c	flow-dissector: Fix alignment issue in __skb_flow_get_ports	2014-10-10 15:33:47 -04:00
flow.c
gen_estimator.c
gen_stats.c
iovec.c	fold verify_iovec() into copy_msghdr_from_user()	2014-11-19 16:23:49 -05:00
link_watch.c	net/core: include linux/types.h instead of asm/types.h	2014-11-18 15:26:32 -05:00
Makefile
neighbour.c	neigh: remove dynamic neigh table registration support	2014-11-11 15:23:54 -05:00
net_namespace.c
net-procfs.c
net-sysfs.c	net-sysfs: expose physical switch id for particular device	2014-12-02 20:01:22 -08:00
net-sysfs.h
net-traces.c
netclassid_cgroup.c
netevent.c
netpoll.c	vlan: introduce *vlan_hwaccel_push_inside helpers	2014-11-21 14:20:17 -05:00
netprio_cgroup.c
pktgen.c	net: pktgen: Deletion of an unnecessary check before the function call "proc_remove"	2014-11-19 15:20:15 -05:00
ptp_classifier.c
request_sock.c
rtnetlink.c	rocker: remove swdev mode	2014-12-09 18:24:47 -05:00
scm.c
secure_seq.c
skbuff.c	net: Split netdev_alloc_frag into __alloc_page_frag and add __napi_alloc_frag	2014-12-10 13:31:57 -05:00
sock_diag.c
sock.c	net: sock: allow eBPF programs to be attached to sockets	2014-12-05 21:47:32 -08:00
stream.c
sysctl_net_core.c	net: provide a per host RSS key generic infrastructure	2014-11-16 15:59:11 -05:00
timestamping.c
tso.c	net: tso: fix unaligned access to crafted TCP header in helper API	2014-10-22 12:52:55 -04:00
utils.c	net: Convert LIMIT_NETDEBUG to net_dbg_ratelimited	2014-11-11 14:10:31 -05:00