John Stultz
5de23d435e
proc: add /proc/<pid>/timerslack_ns interface ...
This patch provides a proc/PID/timerslack_ns interface which exposes a
task's timerslack value in nanoseconds and allows it to be changed.
This allows power/performance management software to set timer slack for
other threads according to its policy for the thread (such as when the
thread is designated foreground vs. background activity)
If the value written is non-zero, slack is set to that value. Otherwise
sets it to the default for the thread.
This interface checks that the calling task has permissions to to use
PTRACE_MODE_ATTACH_FSCREDS on the target task, so that we can ensure
arbitrary apps do not change the timer slack for other apps.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Oren Laadan <orenl@cellrox.com>
Cc: Ruchi Kandoi <kandoiruchi@google.com>
Cc: Rom Lemarchand <romlem@android.com>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-17 15:09:34 -07:00
FS-Cache: Count the number of initialised operations
2015-04-02 14:28:53 +01:00
update CIFS TODO list
2014-08-02 01:26:07 -05:00
configfs: implement binary attributes
2016-01-04 12:31:46 +01:00
ipconfig: send Client-identifier in DHCP requests
2015-10-18 19:23:52 -07:00
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
Documentation: update .gitignore files
2014-09-26 11:02:59 +02:00
dax: replace XIP documentation with DAX documentation
2015-02-16 17:56:03 -08:00
9p: update documentation
2014-01-24 10:55:21 -06:00
affs: add mount option to avoid filename truncates
2014-04-07 16:36:08 -07:00
doc: fix double words
2014-03-21 13:16:58 +01:00
autofs: the documentation I wanted to read
2014-10-14 02:18:17 +02:00
Documentation: remove outdated information from automount-support.txt
2015-05-15 01:10:38 -04:00
Documentation: befs.txt: no maintainer, orphaned
2011-08-13 18:34:03 -07:00
Documentation: filesystems: btrfs: Fixed typos and whitespace
2015-07-09 14:31:06 -06:00
ceph: enable/disable dentry complete flags via mount option
2012-01-12 11:00:40 -08:00
dax: add huge page fault support
2015-09-08 15:35:28 -07:00
debugfs: Pass bool pointer to debugfs_create_bool()
2015-10-04 11:36:07 +01:00
vfs: take i_mutex on renamed file
2013-11-09 00:16:40 -05:00
ocfs2: update web page + git tree in documentation
2015-02-28 09:57:50 -08:00
efi: Make efivarfs entries immutable by default
2016-02-10 16:25:52 +00:00
exofs: Add option to mount by osdname
2011-03-15 15:02:51 +02:00
fs: Remove ext3 filesystem driver
2015-07-23 20:59:40 +02:00
fs: Remove ext3 filesystem driver
2015-07-23 20:59:40 +02:00
ext4: add DAX functionality
2015-02-16 17:56:04 -08:00
f2fs: introduce new option for controlling data flush
2015-12-16 09:25:48 -08:00
fsioctl.c: make generic_block_fiemap() signal-tolerant
2015-02-10 14:30:30 -08:00
Wrap accesses to the fd_sets in struct fdtable
2012-02-19 10:30:52 -08:00
gfs2: Remove gl_spin define
2015-10-29 12:57:48 -05:00
Documentation: Fix multiple typo in Documentation
2012-03-07 16:08:24 +01:00
GFS2: Update main gfs2 doc
2012-05-10 11:45:31 +01:00
Documentation: HFS is orphaned
2011-11-04 12:01:48 -07:00
Documentation: update URL to hfsplus Technote 1150
2014-02-20 14:48:51 +01:00
inotify: update documentation to reflect code changes
2015-02-10 14:30:28 -08:00
doc: fix misspellings with 'codespell' tool
2013-05-28 12:02:12 +02:00
switch ->get_link() to delayed_call, kill ->put_link()
2015-12-30 13:01:03 -05:00
doc: fix broken references
2011-09-27 18:08:04 +02:00
fix "seperate" typos in comments
2010-05-10 11:56:30 +02:00
configfs: remove old API
2015-10-13 22:17:57 -07:00
nilfs2: update project's web site in nilfs2.txt
2014-04-03 16:21:26 -07:00
NTFS: Remove changelog from Documentation/filesystems/ntfs.txt.
2014-10-16 12:43:57 +01:00
ocfs2: update web page + git tree in documentation
2015-02-28 09:57:50 -08:00
omfs: add filesystem documentation
2008-07-26 12:00:05 -07:00
Remove email address from Documentation/filesystems/overlayfs.txt
2015-11-11 10:04:53 -07:00
Documentation: add new description of path-name lookup.
2015-11-02 18:18:25 -07:00
Documentation: add new description of path-name lookup.
2015-11-02 18:18:25 -07:00
Make sure that highmem pages are not added to symlink page cache
2016-01-14 17:56:54 -05:00
proc: add /proc/<pid>/timerslack_ns interface
2016-03-17 15:09:34 -07:00
doc: filesystems : Fix typo in Documentations/filesystems
2013-08-20 13:45:56 +02:00
quota: Update documentation
2015-05-18 11:23:07 +02:00
initmpfs: use initramfs if rootfstype= or root= specified
2013-09-11 15:59:38 -07:00
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
Documentation: update seq_file
2014-12-29 15:40:18 -07:00
Doc: treewide: Fix grammar "a" to "an"
2015-12-10 11:36:40 -07:00
Squashfs: Add LZ4 compression configuration option
2014-11-27 18:48:44 +00:00
sysfs-tagging.txt: fix pre-kernfs references
2015-09-13 14:38:51 -06:00
sysfs.txt: mention that store method buffers are null-terminated
2015-09-13 14:38:51 -06:00
[PATCH] fs/sysv/: doc cleanup
2006-12-07 08:39:44 -08:00
Documentation/filesystems: describe the shared memory usage/accounting
2016-01-14 16:00:49 -08:00
UBIFS: switch self-check knobs to debugfs
2011-07-04 10:54:28 +03:00
udf: implement mode and dmode mounting options
2009-04-02 12:29:50 +02:00
Documentation/filesystems/vfat.txt: update the limitation for fat fallocate
2016-01-20 17:09:18 -08:00
switch ->get_link() to delayed_call, kill ->put_link()
2015-12-30 13:01:03 -05:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
xfs: add metadata CRC documentation
2013-04-27 13:27:43 -05:00
xfs: fix kernel version in docs
2015-06-01 07:15:38 +10:00
5de23d435e