redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/Documentation/filesystems
History
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
00-INDEX Staging/IIO patches for 4.18-rc1 2018-06-09 10:32:39 -07:00
9p.txt 9p: update documentation 2014-01-24 10:55:21 -06:00
Locking Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
adfs.txt
…
affs.txt affs: add mount option to avoid filename truncates 2014-04-07 16:36:08 -07:00
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 Documentation: update URL to hfsplus Technote 1150 2014-02-20 14:48:51 +01:00
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
…
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 NTFS: Remove changelog from Documentation/filesystems/ntfs.txt. 2014-10-16 12:43:57 +01:00
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 initmpfs: use initramfs if rootfstype= or root= specified 2013-09-11 15:59:38 -07:00
relay.txt doc: Fix typo in doucmentations 2013-07-25 12:34:15 +02:00
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 Squashfs: Add LZ4 compression configuration option 2014-11-27 18:48:44 +00:00
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