OpenCloudOS-Kernel/net/sctp
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
..
Kconfig net: sctp: Remove debug SCTP probe module 2018-01-02 14:27:29 -05:00
Makefile sctp: rename sctp_diag.c as diag.c 2018-02-13 13:56:31 -05:00
associola.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-11 20:53:22 -04:00
auth.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
bind_addr.c sctp: remove the typedef sctp_scope_t 2017-08-06 21:33:41 -07:00
chunk.c sctp: fix erroneous inc of snmp SctpFragUsrMsgs 2018-06-21 12:49:33 +09:00
debug.c sctp: add SCTP_CID_I_DATA and SCTP_CID_I_FWD_TSN conversion in sctp_cname 2018-02-12 11:40:01 -05:00
diag.c sctp: add file comments in diag.c 2018-02-13 13:56:31 -05:00
endpointola.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
input.c sctp: remove unnecessary asoc in sctp_has_association 2018-03-27 10:22:11 -04:00
inqueue.c sctp: fix the issue that the cookie-ack with auth can't get processed 2018-05-02 11:15:33 -04:00
ipv6.c Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
objcnt.c proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
offload.c net: use skb_is_gso_sctp() instead of open-coding 2018-03-09 11:41:47 -05:00
output.c sctp: define sctp_packet_gso_append to build GSO frames 2018-06-14 10:25:53 -07:00
outqueue.c sctp: checkpatch fixups 2018-05-14 23:15:27 -04:00
primitive.c sctp: remove the typedef sctp_subtype_t 2017-08-06 21:33:42 -07:00
proc.c proc: introduce proc_create_net_single 2018-05-16 07:24:30 +02:00
protocol.c Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
sm_make_chunk.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-11 20:53:22 -04:00
sm_sideeffect.c sctp: add SCTP_AUTH_NO_AUTH type for AUTHENTICATION_EVENT 2018-03-14 13:48:27 -04:00
sm_statefuns.c sctp: delay the authentication for the duplicated cookie-echo chunk 2018-05-07 23:39:10 -04:00
sm_statetable.c sctp: implement validate_ftsn for sctp_stream_interleave 2017-12-15 13:52:22 -05:00
socket.c Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
stream.c sctp: clear the new asoc's stream outcnt in sctp_stream_update 2018-04-27 13:34:34 -04:00
stream_interleave.c sctp: remove the left unnecessary check for chunk in sctp_renege_events 2018-02-16 16:32:37 -05:00
stream_sched.c sctp: add stream interleave support in stream scheduler 2017-12-15 13:52:22 -05:00
stream_sched_prio.c sctp: remove extern from stream sched 2017-11-28 11:00:13 -05:00
stream_sched_rr.c sctp: remove extern from stream sched 2017-11-28 11:00:13 -05:00
sysctl.c sctp: support sysctl to allow users to use stream interleave 2017-12-15 13:52:22 -05:00
transport.c sctp: not allow transport timeout value less than HZ/5 for hb_timer 2018-06-05 10:22:45 -04:00
tsnmap.c sctp: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ulpevent.c sctp: remove sctp_chunk_put from fail_mark err path in sctp_ulpevent_make_rcvmsg 2018-05-10 17:48:36 -04:00
ulpqueue.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-12-22 11:16:31 -05:00