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
..
caching	fscache: Pass object size in rather than calling back for it	2018-04-06 14:05:14 +01:00
cifs	cifs: minor documentation updates	2018-06-15 02:38:07 -05:00
configfs	fs: configfs: don't return anything from drop_link	2016-12-01 10:50:49 +01:00
nfs	ipconfig: Write NTP server IPs to /proc/net/ipconfig/ntp_servers	2018-04-24 13:40:42 -04:00
pohmelfs	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
9p.txt
00-INDEX	Staging/IIO patches for 4.18-rc1	2018-06-09 10:32:39 -07:00
adfs.txt
affs.txt
afs.txt	afs: Implement @sys substitution handling	2018-04-09 21:12:31 +01:00
autofs-mount-control.txt	autofs: use autofs instead of autofs4 in documentation	2018-06-07 17:34:39 -07:00
autofs.txt	autofs: use autofs instead of autofs4 in documentation	2018-06-07 17:34:39 -07:00
automount-support.txt	autofs: use autofs instead of autofs4 in documentation	2018-06-07 17:34:39 -07:00
befs.txt
bfs.txt	Tigran has moved	2017-05-12 15:57:15 -07:00
btrfs.txt	Documentation: btrfs: remove usage specific information	2016-03-11 17:02:09 +01:00
ceph.txt	ceph: update description of some mount options	2018-06-04 20:46:02 +02:00
coda.txt
conf.py	docs-rst: convert filesystems book to ReST	2017-05-16 08:44:08 -03:00
cramfs.txt	cramfs: rehabilitate it	2017-10-15 00:47:23 -04:00
dax.txt	powerpc/cell: Remove axonram driver	2018-01-28 17:00:36 +11:00
debugfs.txt	debugfs: Pass bool pointer to debugfs_create_bool()	2015-10-04 11:36:07 +01:00
devpts.txt	devpts: Make each mount of devpts an independent filesystem.	2016-06-05 10:36:01 -07:00
directory-locking	vfs: remove unused i_op->rename	2016-09-27 11:03:58 +02:00
dlmfs.txt	ocfs2: update web page + git tree in documentation	2015-02-28 09:57:50 -08:00
dnotify.txt	Documentation: fix selftests related file refs	2017-10-19 12:58:21 -06:00
ecryptfs.txt
efivarfs.txt	efi: Make efivarfs entries immutable by default	2016-02-10 16:25:52 +00:00
exofs.txt
ext2.txt	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
ext3.txt	fs: Remove ext3 filesystem driver	2015-07-23 20:59:40 +02:00
ext4.txt	Only miscellaneous cleanups and bug fixes for ext4 this cycle.	2018-02-03 13:49:22 -08:00
f2fs.txt	f2fs: add fsync_mode=nobarrier for non-atomic files	2018-05-29 12:04:08 -07:00
fiemap.txt	fsioctl.c: make generic_block_fiemap() signal-tolerant	2015-02-10 14:30:30 -08:00
files.txt
fscrypt.rst	fscrypt: add Speck128/256 support	2018-05-20 16:35:51 -04:00
fuse-io.txt	fuse: add writeback documentation	2018-03-20 17:11:45 +01:00
fuse.txt
gfs2-glocks.txt	GFS2: Minor improvements to comments and documentation	2018-04-12 10:07:51 -07:00
gfs2-uevents.txt
gfs2.txt
hfs.txt
hfsplus.txt
hpfs.txt
index.rst	fscrypt: add a documentation file for filesystem-level encryption	2017-10-31 13:49:24 -04:00
inotify.txt	inotify: update documentation to reflect code changes	2015-02-10 14:30:28 -08:00
isofs.txt
jfs.txt
Locking	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
locks.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
mandatory-locking.txt
nilfs2.txt	MAINTAINERS, nilfs2: change project home URLs	2018-01-13 10:42:48 -08:00
ntfs.txt
ocfs2-online-filecheck.txt	Doc: ocfs: Fix typo in filesystems/ocfs2-online-filecheck.txt	2016-07-01 16:17:15 -06:00
ocfs2.txt	ocfs2: update web page + git tree in documentation	2015-02-28 09:57:50 -08:00
omfs.txt
orangefs.txt	Orangefs: documentation updates	2018-04-04 14:05:48 -04:00
overlayfs.txt	ovl: update documentation for unionmount-testsuite	2018-05-31 11:06:10 +02:00
path-lookup.md	autofs: use autofs instead of autofs4 in documentation	2018-06-07 17:34:39 -07:00
path-lookup.txt	Documentation: add new description of path-name lookup.	2015-11-02 18:18:25 -07:00
porting	vfs: grab the lock instead of blocking in __fd_install during resizing	2017-11-05 18:58:07 -05:00
proc.txt	docs/vm: move numa_memory_policy.rst to Documentation/admin-guide/mm	2018-05-08 09:31:31 -06:00
qnx6.txt	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
quota.txt	scripts/spelling.txt: add "an user" pattern and fix typo instances	2017-02-27 18:43:46 -08:00
ramfs-rootfs-initramfs.txt
relay.txt
romfs.txt
seq_file.txt	Documentation: update seq_file	2014-12-29 15:40:18 -07:00
sharedsubtree.txt	doc: fix grammar	2016-03-09 15:33:06 -07:00
spufs.txt
squashfs.txt
sysfs-pci.txt	PCI: Add pci_mmap_resource_range() and use it for ARM64	2017-04-20 08:47:47 -05:00
sysfs-tagging.txt	sysfs-tagging.txt: fix pre-kernfs references	2015-09-13 14:38:51 -06:00
sysfs.txt	kallsyms: remove print_symbol() function	2018-01-16 16:59:55 +01:00
sysv-fs.txt
tmpfs.txt	docs/vm: move numa_memory_policy.rst to Documentation/admin-guide/mm	2018-05-08 09:31:31 -06:00
ubifs.txt
udf.txt	udf: Remove never implemented mount options	2018-02-27 10:25:33 +01:00
ufs.txt
vfat.txt	Documentation/filesystems/vfat.txt: fix a remark that implies UCS2	2017-12-21 13:39:28 -07:00
vfs.txt	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
xfs-delayed-logging-design.txt
xfs-self-describing-metadata.txt
xfs.txt	xfs: Change URL for the project in xfs.txt	2018-03-21 09:33:04 -06:00