Paul E. McKenney
d28139c4e9
rcu: Apply RCU-bh QSes to RCU-sched and RCU-preempt when safe ...
One necessary step towards consolidating the three flavors of RCU is to
make sure that the resulting consolidated "one flavor to rule them all"
correctly handles networking denial-of-service attacks. One thing that
allows RCU-bh to do so is that __do_softirq() invokes rcu_bh_qs() every
so often, and so something similar has to happen for consolidated RCU.
This must be done carefully. For example, if a preemption-disabled
region of code takes an interrupt which does softirq processing before
returning, consolidated RCU must ignore the resulting rcu_bh_qs()
invocations -- preemption is still disabled, and that means an RCU
reader for the consolidated flavor.
This commit therefore creates a new rcu_softirq_qs() that is called only
from the ksoftirqd task, thus avoiding the interrupted-a-preempted-region
problem. This new rcu_softirq_qs() function invokes rcu_sched_qs(),
rcu_preempt_qs(), and rcu_preempt_deferred_qs(). The latter call handles
any deferred quiescent states.
Note that __do_softirq() still invokes rcu_bh_qs(). It will continue to
do so until a later stage of cleanup when the RCU-bh flavor is removed.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Fix !SMP issue located by kbuild test robot. ]
2018-08-30 16:02:38 -07:00
bpf: fix redirect to map under tail calls
2018-08-17 15:56:23 -07:00
Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2018-08-24 13:19:27 -07:00
kconfig: tinyconfig: remove stale stack protector fixups
2018-06-15 07:15:28 +09:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous()
2018-08-17 16:20:32 -07:00
treewide: convert ISO_8859-1 text comments to utf-8
2018-08-23 18:48:43 -07:00
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 10:47:26 -07:00
Merge branch 'for-4.19/upstream' into for-linus
2018-08-20 18:33:50 +02:00
Updates for v4.19:
2018-08-20 18:32:00 -07:00
PM / sleep: wakeup: Fix build error caused by missing SRCU support
2018-08-15 00:07:08 +02:00
fbdev changes for v4.19:
2018-08-23 15:44:58 -07:00
rcu: Apply RCU-bh QSes to RCU-sched and RCU-preempt when safe
2018-08-30 16:02:38 -07:00
Merge branch 'akpm' (patches from Andrew)
2018-08-22 12:34:08 -07:00
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-08-21 13:47:29 -07:00
Masami found an off by one bug in the code that keeps "notrace" functions
2018-08-23 13:07:00 -07:00
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-06 18:32:44 -08:00
audit: use ktime_get_coarse_real_ts64() for timestamps
2018-07-17 14:45:08 -04:00
audit: track the owner of the command mutex ourselves
2018-02-23 11:22:22 -05:00
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
\n
2018-08-17 09:41:28 -07:00
audit: fix use-after-free in audit_add_watch
2018-07-18 11:43:36 -04:00
audit: rename FILTER_TYPE to FILTER_EXCLUDE
2018-06-19 10:39:54 -04:00
audit/stable-4.18 PR 20180814
2018-08-15 10:46:54 -07:00
time: Enable get/put_compat_itimerspec64 always
2018-06-24 14:39:47 +02:00
cpu/hotplug: Non-SMP machines do not make use of booted_once
2018-08-14 15:00:00 -07:00
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
delayacct: Use raw_spinlocks
2018-04-27 14:34:51 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
signal: Pass pid type into group_send_sig_info
2018-07-21 12:57:35 -05:00
extable: Make init_kernel_text() global
2018-02-21 16:54:06 +01:00
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
Merge branch 'akpm' (patches from Andrew)
2018-08-22 12:34:08 -07:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
futex: Mark expected switch fall-throughs
2018-08-20 18:23:00 +02:00
kernel/hung_task.c: allow to set checking interval separately from timeout
2018-08-22 10:52:47 -07:00
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
jump_label: Disable jump labels in __exit code
2018-03-20 08:57:17 +01:00
kallsyms, x86: Export addresses of PTI entry trampolines
2018-08-14 19:12:29 -03:00
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
sched/core / kcov: avoid kcov_area during task switch
2018-06-15 07:55:24 +09:00
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kexec: yield to scheduler when loading kimage segments
2018-06-15 07:55:24 +09:00
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
kprobes: Replace %p with other pointer types
2018-06-21 17:33:42 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
kbuild: move bin2c back to scripts/ from scripts/basic/
2018-07-18 01:18:05 +09:00
libnvdimm-for-4.19_dax-memory-failure
2018-08-25 18:43:59 -07:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module: use relative references for __ksymtab entries
2018-08-22 10:52:47 -07:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
kernel/params.c: downgrade warning for unsafe parameters
2018-04-11 10:28:37 -07:00
pid: Implement PIDTYPE_TGID
2018-07-21 10:43:12 -05:00
Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-04-03 19:15:32 -07:00
pids: introduce find_get_task_by_vpid() helper
2018-02-06 18:32:46 -08:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
kernel/relay.c: change return type to vm_fault_t
2018-06-15 07:55:24 +09:00
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
audit/stable-4.18 PR 20180605
2018-06-06 16:34:00 -07:00
Merge branch 'akpm' (patches from Andrew)
2018-08-22 12:34:08 -07:00
cpu/hotplug: Fix SMT supported evaluation
2018-08-07 12:25:30 +02:00
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
rcu: Apply RCU-bh QSes to RCU-sched and RCU-preempt when safe
2018-08-30 16:02:38 -07:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-08-24 09:25:39 -07:00
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
namei: allow restricted O_CREAT of FIFOs and regular files
2018-08-23 18:48:43 -07:00
staging: irda: remove remaining remants of irda code removal
2018-04-16 11:26:49 +02:00
pids: introduce find_get_task_by_vpid() helper
2018-02-06 18:32:46 -08:00
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture: Keep old-school dmesg format
2018-06-25 11:30:10 -07:00
kernel: tracepoints: add support for relative references
2018-08-22 10:52:47 -07:00
headers: untangle kmemleak.h from mm.h
2018-04-05 21:36:27 -07:00
fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers
2018-04-02 20:15:59 +02:00
kernel: provide ksys_*() wrappers for syscalls called by kernel/uid16.c
2018-04-02 20:15:30 +02:00
umh: fix race condition
2018-06-07 16:56:28 -04:00
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
userns: move user access out of the mutex
2018-08-11 02:05:53 -05:00
uts: create "struct uts_namespace" from kmem_cache
2018-04-11 10:28:35 -07:00
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
watchdog/softlockup: Fix cpu_stop_queue_work() double-queue bug
2018-07-15 23:51:19 +02:00
watchdog: Reduce message verbosity
2018-08-03 12:19:08 +02:00
Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2018-08-24 13:16:36 -07:00
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
d28139c4e9