linux_dsm_epyc7002/drivers/net
Linus Torvalds a11e1d432b Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
The poll() changes were not well thought out, and completely
unexplained.  They also caused a huge performance regression, because
"->poll()" was no longer a trivial file operation that just called down
to the underlying file operations, but instead did at least two indirect
calls.

Indirect calls are sadly slow now with the Spectre mitigation, but the
performance problem could at least be largely mitigated by changing the
"->get_poll_head()" operation to just have a per-file-descriptor pointer
to the poll head instead.  That gets rid of one of the new indirections.

But that doesn't fix the new complexity that is completely unwarranted
for the regular case.  The (undocumented) reason for the poll() changes
was some alleged AIO poll race fixing, but we don't make the common case
slower and more complex for some uncommon special case, so this all
really needs way more explanations and most likely a fundamental
redesign.

[ This revert is a revert of about 30 different commits, not reverted
  individually because that would just be unnecessarily messy  - Linus ]

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-28 10:40:47 -07:00
..
appletalk
arcnet
bonding treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
caif
can treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
dsa treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
ethernet sfc: make function efx_rps_hash_bucket static 2018-06-24 23:08:25 +09:00
fddi net: fddi: fix a possible null-ptr-deref 2018-06-08 18:47:46 -04:00
fjes
hamradio net: hamradio: use eth_broadcast_addr 2018-06-20 07:51:43 +09:00
hippi treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
hyperv hv_netvsc: Fix the variable sizes in ipsecv2 and rsc offload 2018-06-14 20:15:44 -07:00
ieee802154
ipvlan ipvlan: fix IFLA_MTU ignored on NEWLINK 2018-06-21 14:57:46 +09:00
netdevsim netdevsim: Add extack error message for devlink reload 2018-06-05 12:32:37 -04:00
phy Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-06-16 07:39:34 +09:00
plip
ppp Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
slip treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
team treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
usb qmi_wwan: add support for the Dell Wireless 5821e module 2018-06-24 11:44:28 +09:00
vmxnet3
wan treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
wimax
wireless net: Remove depends on HAS_DMA in case of platform dependency 2018-06-23 10:44:30 +09:00
xen-netback treewide: Use array_size() in vzalloc() 2018-06-12 16:19:22 -07:00
dummy.c
eql.c
geneve.c
gtp.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
ifb.c
Kconfig
LICENSE.SRC
loopback.c
macsec.c
macvlan.c
macvtap.c
Makefile
mdio.c
mii.c
net_failover.c net: net_failover: fix typo in net_failover_slave_register() 2018-06-20 07:56:44 +09:00
netconsole.c
nlmon.c
ntb_netdev.c
rionet.c
sb1000.c
Space.c
sungem_phy.c
tap.c net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan 2018-06-07 16:15:38 -04:00
thunderbolt.c
tun.c net: in virtio_net_hdr only add VLAN_HLEN to csum_start if payload holds vlan 2018-06-07 16:15:38 -04:00
veth.c
virtio_net.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
vrf.c
vsockmon.c
vxlan.c
xen-netfront.c xen-netfront: Update features after registering netdev 2018-06-22 07:54:54 +09:00