Oleg Nesterov 3547ff3aef signals: do_tkill: don't use tasklist_lock ...

Convert do_tkill() to use rcu_read_lock() + lock_task_sighand() to avoid
taking tasklist lock.

Note that we don't return an error if lock_task_sighand() fails, we pretend
the task dies after receiving the signal.  Otherwise, we should fight with the
nasty races with mt-exec without having any advantage.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2008-04-30 08:29:35 -07:00

..

irq

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

power

PM/gxfb: add hook to PM console layer that allows disabling of suspend VT switch

2008-04-28 08:58:36 -07:00

time

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

.gitignore

…

acct.c

bsd_acct: using task_struct->tgid is not right in pid-namespaces

2008-03-24 19:22:20 -07:00

audit_tree.c

…

audit.c

[patch 2/2] Use find_task_by_vpid in audit code

2008-04-28 06:28:30 -04:00

audit.h

[PATCH 1/2] audit: move extern declarations to audit.h

2008-04-28 06:28:04 -04:00

auditfilter.c

Merge branch 'audit.b50' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

2008-04-29 11:41:22 -07:00

auditsc.c

[PATCH] new predicate - AUDIT_FILETYPE

2008-04-28 06:28:37 -04:00

backtracetest.c

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bounds.c

Add kbuild.h that contains common definitions for kbuild users

2008-04-29 08:06:29 -07:00

capability.c

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cgroup_debug.c

CGroup API files: move "releasable" to cgroup_debug subsystem

2008-04-29 08:06:09 -07:00

cgroup.c

cgroups: add an owner to the mm_struct

2008-04-29 08:06:10 -07:00

compat.c

generic: reduce stack pressure in sched_affinity

2008-04-19 19:44:59 +02:00

configs.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

cpu.c

simplify cpu_hotplug_begin()/put_online_cpus()

2008-04-29 08:06:11 -07:00

cpuset.c

Cpuset hardwall flag: add a mem_hardwall flag to cpusets

2008-04-29 08:06:11 -07:00

delayacct.c

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dma.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

exec_domain.c

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exit.c

signals: do_group_exit(): use signal_group_exit() more consistently

2008-04-30 08:29:33 -07:00

extable.c

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fork.c

procfs task exe symlink

2008-04-29 08:06:17 -07:00

futex_compat.c

futex_compat __user annotation

2008-03-30 14:18:41 -07:00

futex.c

NULL noise: fs/*, mm/*, kernel/*

2008-03-30 14:18:41 -07:00

hrtimer.c

hrtimer: raise softirq unlocked to avoid circular lock dependency

2008-04-28 22:22:21 +02:00

itimer.c

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kallsyms.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

Kconfig.hz

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Kconfig.preempt

rcu: move PREEMPT_RCU config option back under PREEMPT

2008-03-10 18:01:20 -07:00

kexec.c

vmcoreinfo: add page flags values

2008-04-28 08:58:23 -07:00

kfifo.c

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kgdb.c

kgdb: always use icache flush for sw breakpoints

2008-04-17 20:05:43 +02:00

kmod.c

generic: use new set_cpus_allowed_ptr function

2008-04-19 19:44:58 +02:00

kprobes.c

kprobes: add (un)register_jprobes for batch registration

2008-04-28 08:58:32 -07:00

ksysfs.c

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kthread.c

kthread: call wake_up_process() without the lock being held

2008-04-29 08:06:04 -07:00

latencytop.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

lockdep_internals.h

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lockdep_proc.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

lockdep.c

…

Makefile

sysctl: allow embedded targets to disable sysctl_check.c

2008-04-29 08:06:22 -07:00

marker.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

module.c

kernel: Remove unnecessary inclusions of asm/semaphore.h

2008-04-18 22:17:04 -04:00

mutex-debug.c

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mutex-debug.h

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mutex.c

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mutex.h

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notifier.c

ipc: re-enable msgmni automatic recomputing msgmni if set to negative

2008-04-29 08:06:13 -07:00

ns_cgroup.c

cgroups: kernel/ns_cgroup.c should #include <linux/nsproxy.h>

2008-04-29 08:06:07 -07:00

nsproxy.c

ipc: sysvsem: refuse clone(CLONE_SYSVSEM|CLONE_NEWIPC)

2008-04-29 08:06:14 -07:00

panic.c

Taint kernel after WARN_ON(condition)

2008-04-29 08:05:59 -07:00

params.c

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pid_namespace.c

kernel: fix integer as NULL pointer warnings

2008-04-28 17:29:18 -07:00

pid.c

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pm_qos_params.c

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posix-cpu-timers.c

posix-timers: fix shadowed variables

2008-04-17 12:22:30 +02:00

posix-timers.c

kernel: Remove unnecessary inclusions of asm/semaphore.h

2008-04-18 22:17:04 -04:00

printk.c

isolate ratelimit from printk.c for other use

2008-04-29 08:06:06 -07:00

profile.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

ptrace.c

ptrace: conditionalize compat_ptrace_request

2008-04-28 14:14:36 -07:00

rcuclassic.c

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rcupdate.c

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rcupreempt_trace.c

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rcupreempt.c

generic: reduce stack pressure in sched_affinity

2008-04-19 19:44:59 +02:00

rcutorture.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

relay.c

Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

2008-04-29 08:18:03 -07:00

res_counter.c

memcgroup: add the max_usage member on the res_counter

2008-04-29 08:06:10 -07:00

resource.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

rtmutex_common.h

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rtmutex-debug.c

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rtmutex-debug.h

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rtmutex-tester.c

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rtmutex.c

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rtmutex.h

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rwsem.c

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sched_debug.c

kernel: use non-racy method for proc entries creation

2008-04-29 08:06:22 -07:00

sched_fair.c

sched: debug: show a weight tree

2008-04-19 19:45:00 +02:00

sched_features.h

sched: /debug/sched_features

2008-04-19 19:45:00 +02:00

sched_idletask.c

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sched_rt.c

sched: rt-group: optimize dequeue_rt_stack

2008-04-19 19:45:00 +02:00

sched_stats.h

cpumask: use new cpus_scnprintf function

2008-04-19 19:44:59 +02:00

sched.c

CGroups _s64 files: use read_s64/write_s64 in CFS cgroup for rt_runtime file

2008-04-29 08:06:09 -07:00

seccomp.c

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semaphore.c

Improve semaphore documentation

2008-04-17 10:43:01 -04:00

signal.c

signals: do_tkill: don't use tasklist_lock

2008-04-30 08:29:35 -07:00

softirq.c

tasklets: execute tasklets in the same order they were queued

2008-04-19 19:44:58 +02:00

softlockup.c

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spinlock.c

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srcu.c

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stacktrace.c

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stop_machine.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial

2008-04-21 16:36:46 -07:00

sys_ni.c

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sys.c

k_getrusage: don't take rcu_read_lock()

2008-04-30 08:29:34 -07:00

sysctl_check.c

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sysctl.c

sysctl: add the ->permissions callback on the ctl_table_root

2008-04-29 08:06:23 -07:00

taskstats.c

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test_kprobes.c

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time.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

timeconst.pl

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timer.c

timers: simplify lockdep handling

2008-04-17 12:22:31 +02:00

tsacct.c

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uid16.c

asmlinkage_protect replaces prevent_tail_call

2008-04-10 17:28:26 -07:00

user_namespace.c

eCryptfs: make key module subsystem respect namespaces

2008-04-29 08:06:07 -07:00

user.c

keys: don't generate user and user session keyrings unless they're accessed

2008-04-29 08:06:17 -07:00

utsname_sysctl.c

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utsname.c

kernel: explicitly include required header files under kernel/

2008-04-29 08:06:04 -07:00

wait.c

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workqueue.c

cleanup_workqueue_thread: remove the unneeded "cpu" parameter

2008-04-29 08:06:11 -07:00