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
tipc: handle collisions of 32-bit node address hash values
2018-03-23 13:12:18 -04:00
tipc: add 128-bit node identifier
2018-03-23 13:12:18 -04:00
tipc: bcast: use true and false for boolean values
2018-03-07 12:18:00 -05:00
tipc: make replicast a user selectable option
2017-01-20 12:10:17 -05:00
tipc: confgiure and apply UDP bearer MTU on running links
2018-04-20 11:04:05 -04:00
tipc: implement configuration of UDP media MTU
2018-04-20 11:04:05 -04:00
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
tipc: replace name table service range array with rb tree
2018-03-31 22:19:52 -04:00
tipc: use the right skb in tipc_sk_fill_sock_diag()
2018-04-08 12:34:29 -04:00
tipc: tipc_disc_addr_trial_msg() can be static
2018-03-25 21:21:43 -04:00
tipc: some cleanups in the file discover.c
2018-03-23 13:12:17 -04:00
tipc: make media address offset a common define
2015-02-27 18:18:48 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-03-06 01:20:46 -05:00
tipc: fix race between poll() and setsockopt()
2018-01-19 15:12:21 -05:00
tipc: rename media/msg related definitions
2015-02-27 18:18:48 -05:00
tipc: implement socket diagnostics for AF_TIPC
2018-03-22 14:43:35 -04:00
tipc: avoid possible string overflow
2018-03-31 22:19:52 -04:00
tipc: handle collisions of 32-bit node address hash values
2018-03-23 13:12:18 -04:00
tipc: implement socket diagnostics for AF_TIPC
2018-03-22 14:43:35 -04:00
tipc: fix infinite loop when dumping link monitor summary
2018-04-18 13:48:43 -04:00
tipc: dump monitor attributes
2016-07-26 14:26:42 -07:00
tipc: obsolete TIPC_ZONE_SCOPE
2018-03-17 17:11:46 -04:00
tipc: handle collisions of 32-bit node address hash values
2018-03-23 13:12:18 -04:00
tipc: permit overlapping service ranges in name table
2018-03-31 22:19:52 -04:00
tipc: permit overlapping service ranges in name table
2018-03-31 22:19:52 -04:00
tipc: clean up removal of binding table items
2018-05-10 15:25:45 -04:00
tipc: fix unbalanced reference counter
2018-04-12 21:46:10 -04:00
tipc: fix possible crash in __tipc_nl_net_set()
2018-04-16 18:08:18 -04:00
tipc: obtain node identity from interface by default
2018-03-23 13:12:18 -04:00
tipc: fix possible crash in __tipc_nl_net_set()
2018-04-16 18:08:18 -04:00
tipc: make cluster size threshold for monitoring configurable
2016-07-26 14:26:42 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-05-11 20:53:22 -04:00
tipc: introduce ioctl for fetching node identity
2018-04-27 11:05:41 -04:00
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
tipc: use the right skb in tipc_sk_fill_sock_diag()
2018-04-08 12:34:29 -04:00
tipc: fix unbalanced reference counter
2018-04-12 21:46:10 -04:00
tipc: replace name table service range array with rb tree
2018-03-31 22:19:52 -04:00
tipc: add name distributor resiliency queue
2014-09-01 17:51:48 -07:00
tipc: don't call sock_release() in atomic context
2018-02-19 14:38:50 -05:00
tipc: rename tipc_server to tipc_topsrv
2018-02-16 15:26:34 -05:00
tipc: set default MTU for UDP media
2018-04-20 11:04:05 -04:00
tipc: implement configuration of UDP media MTU
2018-04-20 11:04:05 -04:00
a11e1d432b