linux/Documentation
Linus Torvalds 9819f682e4 A set of scheduler updates:
- Prevent PSI state corruption when schedule() races with cgroup move.  A
    recent commit combined two PSI callbacks to reduce the number of cgroup
    tree updates, but missed that schedule() can drop rq::lock for load
    balancing, which opens the race window for cgroup_move_task() which then
    observes half updated state. The fix is to solely use task::ps_flags
    instead of looking at the potentially mismatching scheduler state
 
  - Prevent an out-of-bounds access in uclamp caused bu a rounding division
    which can lead to an off-by-one error exceeding the buckets array size.
 
  - Prevent unfairness caused by missing load decay when a task is attached
    to a cfs runqueue. The old load of the task is attached to the runqueue
    and never removed. Fix it by enforcing the load update through the
    hierarchy for unthrottled run queue instances.
 
  - A documentation fix fot the 'sched_verbose' command line option
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Merge tag 'sched-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Thomas Gleixner:
 "A set of scheduler updates:

   - Prevent PSI state corruption when schedule() races with cgroup
     move.

     A recent commit combined two PSI callbacks to reduce the number of
     cgroup tree updates, but missed that schedule() can drop rq::lock
     for load balancing, which opens the race window for
     cgroup_move_task() which then observes half updated state.

     The fix is to solely use task::ps_flags instead of looking at the
     potentially mismatching scheduler state

   - Prevent an out-of-bounds access in uclamp caused bu a rounding
     division which can lead to an off-by-one error exceeding the
     buckets array size.

   - Prevent unfairness caused by missing load decay when a task is
     attached to a cfs runqueue.

     The old load of the task was attached to the runqueue and never
     removed. Fix it by enforcing the load update through the hierarchy
     for unthrottled run queue instances.

   - A documentation fix fot the 'sched_verbose' command line option"

* tag 'sched-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix unfairness caused by missing load decay
  sched: Fix out-of-bound access in uclamp
  psi: Fix psi state corruption when schedule() races with cgroup move
  sched,doc: sched_debug_verbose cmdline should be sched_verbose
2021-05-09 13:14:34 -07:00
..
ABI Networking fixes for 5.13-rc1, including fixes from bpf, can 2021-05-08 08:31:46 -07:00
accounting
admin-guide Merge branch 'master' into next 2021-05-08 21:12:55 +10:00
arm It's been a relatively busy cycle in docsland, though more than usually 2021-04-26 13:22:43 -07:00
arm64 Assorted arm64 fixes and clean-ups, the most important: 2021-05-07 12:11:05 -07:00
block
bpf bpf: Document the pahole release info related to libbpf in bpf_devel_QA.rst 2021-04-23 17:11:58 -07:00
cdrom
core-api A few late-arriving documentation fixes, including some oprofile cleanup, a 2021-05-06 08:33:54 -07:00
cpu-freq
crypto
dev-tools scripts/gdb: add lx_current support for arm64 2021-05-07 00:26:33 -07:00
devicetree Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
doc-guide
driver-api VFIO updates for v5.13-rc1 pt2 2021-05-06 14:22:58 -07:00
fault-injection
fb Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
features powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
filesystems f2fs-for-5.13-rc1 2021-05-04 18:03:38 -07:00
firmware_class
firmware-guide Documentation: firmware-guide: gpio-properties: Add note to SPI CS case 2021-04-28 19:11:13 +02:00
fpga Documentation: fpga: dfl: Add description for DFL UIO support 2021-03-28 14:58:18 +02:00
gpu drm-misc-next for 5.13: 2021-04-07 17:32:12 +10:00
hid Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
hwmon hwmon: Remove amd_energy driver 2021-04-20 06:52:08 -07:00
i2c
ia64
ide
iio iio: hrtimer: Allow sub Hz granularity 2021-03-25 19:13:49 +00:00
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-05-06 23:37:55 -07:00
isdn
kbuild Kconfig updates for v5.13 2021-04-29 14:32:00 -07:00
kernel-hacking
leds Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
litmus-tests
livepatch
locking
m68k
maintainer
mhi
mips
misc-devices dw-xdata-pcie: Update outdated info and improve text format 2021-04-14 19:47:28 +02:00
netlabel
networking Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-04-28 11:59:31 -07:00
nios2
nvdimm
openrisc
parisc
PCI
pcmcia
power power supply and reset changes for the v5.13 series 2021-04-28 15:43:58 -07:00
powerpc powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
process A few late-arriving documentation fixes, including some oprofile cleanup, a 2021-05-06 08:33:54 -07:00
RCU
riscv Documentation: riscv: Add documentation that describes the VM layout 2021-04-26 08:25:05 -07:00
s390 s390/pci: expose UID uniqueness guarantee 2021-04-05 11:30:57 +02:00
scheduler sched,doc: sched_debug_verbose cmdline should be sched_verbose 2021-05-06 15:33:26 +02:00
scsi for-5.13/block-2021-04-27 2021-04-28 14:27:12 -07:00
security Add Landlock, a new LSM from Mickaël Salaün <mic@linux.microsoft.com> 2021-05-01 18:50:44 -07:00
sh
sound
sparc
sphinx
sphinx-static
spi spi: Updates for v5.13 2021-04-26 16:32:11 -07:00
staging
target
timers
trace Documentation: trace: Add documentation for TRBE 2021-04-06 16:05:38 -06:00
translations A few late-arriving documentation fixes, including some oprofile cleanup, a 2021-05-06 08:33:54 -07:00
usb docs: usbip: Fix major fields and descriptions in protocol 2021-04-09 16:04:45 +02:00
userspace-api Add Landlock, a new LSM from Mickaël Salaün <mic@linux.microsoft.com> 2021-05-01 18:50:44 -07:00
virt ARM: 2021-05-01 10:14:08 -07:00
vm mm: gup: remove FOLL_SPLIT 2021-04-30 11:20:37 -07:00
w1
watchdog
x86 A few late-arriving documentation fixes, including some oprofile cleanup, a 2021-05-06 08:33:54 -07:00
xtensa
.gitignore
arch.rst
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
COPYING-logo
docutils.conf
dontdiff kbuild: generate Module.symvers only when vmlinux exists 2021-04-25 05:17:02 +09:00
index.rst
Kconfig
logo.gif
Makefile
memory-barriers.txt
SubmittingPatches
watch_queue.rst