Chuck Lever 00ee972739 SUNRPC: Handle TCP socket sends with kernel_sendpage() again ... [ Upstream commit 4a85a6a3320b4a622315d2e0ea91a1d2b013bce4 ] Daire Byrne reports a ~50% aggregrate throughput regression on his Linux NFS server after commit da1661b93b ("SUNRPC: Teach server to use xprt_sock_sendmsg for socket sends"), which replaced kernel_send_page() calls in NFSD's socket send path with calls to sock_sendmsg() using iov_iter. Investigation showed that tcp_sendmsg() was not using zero-copy to send the xdr_buf's bvec pages, but instead was relying on memcpy. This means copying every byte of a large NFS READ payload. It looks like TLS sockets do indeed support a ->sendpage method, so it's really not necessary to use xprt_sock_sendmsg() to support TLS fully on the server. A mechanical reversion of da1661b93b is not possible at this point, but we can re-implement the server's TCP socket sendmsg path using kernel_sendpage(). Reported-by: Daire Byrne <daire@dneg.com> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=209439 Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-01-27 11:54:57 +01:00
..
6lowpan
9p	net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid	2020-10-12 10:05:47 +02:00
802
8021q	net: vlan: avoid leaks on register_vlan_dev() failures	2021-01-17 14:16:55 +01:00
appletalk
atm	net: atm: fix update of position index in lec_seq_next	2020-10-31 12:26:30 -07:00
ax25
batman-adv	batman-adv: Don't always reallocate the fragmentation skb head	2020-11-27 08:02:55 +01:00
bluetooth	Bluetooth: Fix attempting to set RPA timeout when unsupported	2021-01-09 13:46:23 +01:00
bpf	bpf: fix raw_tp test run in preempt kernel	2020-09-30 08:34:08 -07:00
bpfilter	Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"	2020-10-15 12:33:24 -07:00
bridge	bridge: Fix a deadlock when enabling multicast snooping	2020-12-07 17:14:43 -08:00
caif
can	can: isotp: isotp_getname(): fix kernel information leak	2021-01-17 14:17:05 +01:00
ceph	libceph: clear con->out_msg on Policy::stateful_server faults	2020-10-12 15:29:27 +02:00
core	net: avoid 32 x truesize under-estimation for tiny skbs	2021-01-23 16:04:03 +01:00
dcb	net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands	2021-01-23 16:04:01 +01:00
dccp	tcp: fix race condition when creating child sockets from syncookies	2020-11-23 16:32:33 -08:00
decnet
dns_resolver
dsa	net: dsa: unbind all switches from tree when DSA master unbinds	2021-01-23 16:04:05 +01:00
ethernet
ethtool	ethtool: fix string set id check	2021-01-06 14:56:48 +01:00
hsr	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ieee802154	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
ife
ipv4	esp: avoid unneeded kmap_atomic call	2021-01-23 16:04:01 +01:00
ipv6	net: sit: unregister_netdevice on newlink's error path	2021-01-23 16:04:02 +01:00
iucv	net/af_iucv: set correct sk_protocol for child sockets	2020-11-21 14:43:45 -08:00
kcm
key
l2tp	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
l3mdev
lapb
llc
mac80211	mac80211: check if atf has been disabled in __ieee80211_schedule_txq	2021-01-23 16:04:04 +01:00
mac802154
mpls	mpls: load mpls_gso after mpls_iptunnel	2020-10-20 21:16:45 -07:00
mptcp	mptcp: fix security context on server socket	2021-01-06 14:56:48 +01:00
ncsi	net/ncsi: Use real net-device for response handler	2021-01-12 20:18:10 +01:00
netfilter	netfilter: nf_nat: Fix memleak in nf_nat_init	2021-01-19 18:27:33 +01:00
netlabel	netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()	2020-11-14 12:07:57 -08:00
netlink	netlink: export policy in extended ACK	2020-10-09 20:22:32 -07:00
netrom
nfc	nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME attribute in nfc_genl_fw_download()	2020-10-20 17:06:22 -07:00
nsh
openvswitch	openvswitch: fix error return code in validate_and_copy_dec_ttl()	2020-12-04 15:43:14 -08:00
packet	net/packet: fix packet receive on L3 devices without visible hard header	2020-11-23 17:29:36 -08:00
phonet
psample	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
qrtr	net: qrtr: ns: Fix the incorrect usage of rcu_read_lock()	2020-10-06 06:01:35 -07:00
rds	RDMA: Add rdma_connect_locked()	2020-10-28 09:14:49 -03:00
rfkill	rfkill: Fix use-after-free in rfkill_resume()	2020-11-12 09:18:06 +01:00
rose	rose: Fix Null pointer dereference in rose_send_frame()	2020-11-20 10:04:58 -08:00
rxrpc	rxrpc: Fix handling of an unsupported token type in rxrpc_read()	2021-01-23 16:04:03 +01:00
sched	net: sched: prevent invalid Scell_log shift count	2021-01-12 20:18:12 +01:00
sctp	sctp: change to hold/put transport for proto_unreach_timer	2020-11-14 11:57:12 -08:00
smc	net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid()	2020-11-19 10:59:19 -08:00
strparser
sunrpc	SUNRPC: Handle TCP socket sends with kernel_sendpage() again	2021-01-27 11:54:57 +01:00
switchdev	net: switchdev: Fixed kerneldoc warning	2020-09-23 17:46:31 -07:00
tipc	tipc: fix NULL deref in tipc_link_xmit()	2021-01-23 16:04:00 +01:00
tls	net/tls: Protect from calling tls_dev_del for TLS RX twice	2020-11-25 17:31:06 -08:00
unix	networking changes for the 5.10 merge window	2020-10-15 18:42:13 -07:00
vmw_vsock	vsock/virtio: discard packets only when socket is really closed	2020-11-23 16:36:29 -08:00
wimax	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
wireless	cfg80211: select CONFIG_CRC32	2021-01-19 18:27:28 +01:00
x25	net/x25: prevent a couple of overflows	2020-12-02 17:26:36 -08:00
xdp	xsk: Rollback reservation at NETDEV_TX_BUSY	2021-01-17 14:17:05 +01:00
xfrm	net: xfrm: fix memory leak in xfrm_user_policy()	2020-11-10 09:14:25 +01:00
compat.c	iov_iter: transparently handle compat iovecs in import_iovec	2020-10-03 00:02:13 -04:00
devres.c
Kconfig	drop_monitor: Convert to using devlink tracepoint	2020-09-30 18:01:26 -07:00
Makefile
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-10-05 18:40:01 -07:00
sysctl_net.c