AcoSail/kernel_optimize_test
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kernel_optimize_test/kernel
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Masoud Asgharifard Sharbiani abd4f7505b x86: i386-show-unhandled-signals-v3 
This patch makes the i386 behave the same way that x86_64 does when a
segfault happens.  A line gets printed to the kernel log so that tools
that need to check for failures can behave more uniformly between
debug.show_unhandled_signals sysctl variable to 0 (or by doing echo 0 >
/proc/sys/debug/exception-trace)

Also, all of the lines being printed are now using printk_ratelimit() to
deny the ability of DoS from a local user with a program like the
following:

main()
{
       while (1)
               if (!fork()) *(int *)0 = 0;
}

This new revision also includes the fix that Andrew did which got rid of
new sysctl that was added to the system in earlier versions of this.
Also, 'show-unhandled-signals' sysctl has been renamed back to the old
'exception-trace' to avoid breakage of people's scripts.

AK: Enabling by default for i386 will be likely controversal, but let's see what happens
AK: Really folks, before complaining just fix your segfaults
AK: I bet this will find a lot of silent issues

Signed-off-by: Masoud Sharbiani <masouds@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
[ Personally, I've found the complaints useful on x86-64, so I'm all for
  this. That said, I wonder if we could do it more prettily..   -Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-22 11:03:37 -07:00
..
irq x86_64: Report the pending irq if available in smp_affinity 2007-07-21 18:37:07 -07:00
power x86: PM_TRACE support 2007-07-21 18:37:10 -07:00
time NTP: move the cmos update code into ntp.c 2007-07-21 17:49:15 -07:00
.gitignore
acct.c
audit.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
audit.h Audit: add TTY input auditing 2007-07-16 09:05:47 -07:00
auditfilter.c kernel/auditfilter: kill bogus uninit'd-var compiler warning 2007-07-17 16:17:59 -04:00
auditsc.c mm: variable length argument support 2007-07-19 10:04:45 -07:00
capability.c
compat.c signal/timer/event: timerfd compat code 2007-05-11 08:29:36 -07:00
configs.c use simple_read_from_buffer in kernel/ 2007-05-09 12:30:49 -07:00
cpu.c HOTPLUG: Add CPU_DYING notifier 2007-07-16 12:05:49 +03:00
cpuset.c usermodehelper: Tidy up waiting 2007-07-18 08:47:40 -07:00
delayacct.c sched: update delay-accounting to use CFS's precise stats 2007-07-09 18:52:00 +02:00
die_notifier.c move die notifier handling to common code 2007-05-08 11:15:04 -07:00
dma.c
exec_domain.c
exit.c Freezer: avoid freezing kernel threads prematurely 2007-07-19 10:04:42 -07:00
extable.c
fork.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
futex_compat.c Revert "futex_requeue_pi optimization" 2007-06-18 09:48:41 -07:00
futex.c mm: fault feedback #2 2007-07-19 10:04:41 -07:00
hrtimer.c hrtimer: speedup hrtimer_enqueue 2007-07-21 17:49:15 -07:00
itimer.c The scheduled -EINVAL for invalid timevals in setitimer 2007-05-08 11:15:13 -07:00
kallsyms.c kallsyms: make KSYM_NAME_LEN include space for trailing '\0' 2007-07-17 10:23:03 -07:00
Kconfig.hz
Kconfig.preempt Fix trivial typos in Kconfig* files 2007-05-09 07:12:20 +02:00
kexec.c kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
kfifo.c is_power_of_2: kernel/kfifo.c 2007-07-16 09:05:50 -07:00
kmod.c PM: prevent frozen user mode helpers from failing the freezing of tasks 2007-07-19 10:04:42 -07:00
kprobes.c jprobes: make jprobes a little safer for users 2007-07-19 10:04:44 -07:00
ksysfs.c FRV: Fix linkage problems 2007-07-20 12:01:34 -07:00
kthread.c mm: fix improper .init-type section references 2007-07-16 09:05:36 -07:00
latency.c
lockdep_internals.h
lockdep_proc.c lockstat: better class name representation 2007-07-19 10:04:49 -07:00
lockdep.c lockdep debugging: give stacktrace for init_error 2007-07-19 10:04:49 -07:00
Makefile user namespace: add the framework 2007-07-16 09:05:47 -07:00
module.c kallsyms: make KSYM_NAME_LEN include space for trailing '\0' 2007-07-17 10:23:03 -07:00
mutex-debug.c
mutex-debug.h
mutex.c lockstat: measure lock bouncing 2007-07-19 10:04:49 -07:00
mutex.h
nsproxy.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
panic.c Report that kernel is tainted if there was an OOPS 2007-07-17 10:23:02 -07:00
params.c sysfs: kill unnecessary attribute->owner 2007-07-11 16:09:06 -07:00
pid.c namespace: ensure clone_flags are always stored in an unsigned long 2007-07-16 09:05:48 -07:00
posix-cpu-timers.c sched: make posix-cpu-timers use CFS's accounting information 2007-07-09 18:51:58 +02:00
posix-timers.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
printk.c kernel/printk.c: document possible deadlock against scheduler 2007-07-16 09:05:52 -07:00
profile.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
ptrace.c coredump masking: reimplementation of dumpable using two flags 2007-07-19 10:04:46 -07:00
rcupdate.c Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
rcutorture.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
relay.c kernel/relay.c: make functions static 2007-07-19 10:04:47 -07:00
resource.c
rtmutex_common.h FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rtmutex-debug.c FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rtmutex-debug.h
rtmutex-tester.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
rtmutex.c FUTEX: Tidy up the code 2007-07-16 09:05:49 -07:00
rtmutex.h
rwsem.c lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex 2007-07-19 10:04:49 -07:00
sched_debug.c [PATCH] sched: remove stale version info from kernel/sched_debug.c 2007-07-13 10:10:41 -07:00
sched_fair.c sched: cfs core, kernel/sched_fair.c 2007-07-09 18:51:58 +02:00
sched_idletask.c sched: cfs core, kernel/sched_idletask.c 2007-07-09 18:51:58 +02:00
sched_rt.c sched: cfs core, kernel/sched_rt.c 2007-07-09 18:51:58 +02:00
sched_stats.h sched: update delay-accounting to use CFS's precise stats 2007-07-09 18:52:00 +02:00
sched.c [PATCH] sched: implement cpu_clock(cpu) high-speed time source 2007-07-19 21:28:35 +02:00
seccomp.c make seccomp zerocost in schedule 2007-07-16 09:05:50 -07:00
signal.c x86: i386-show-unhandled-signals-v3 2007-07-22 11:03:37 -07:00
softirq.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
softlockup.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
spinlock.c lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex 2007-07-19 10:04:49 -07:00
srcu.c
stacktrace.c
stop_machine.c Fix stop_machine_run problem with naughty real time process 2007-07-16 09:05:41 -07:00
sys_ni.c diskquota: 32bit quota tools on 64bit architectures 2007-07-16 09:05:48 -07:00
sys.c coredump masking: reimplementation of dumpable using two flags 2007-07-19 10:04:46 -07:00
sysctl.c x86: i386-show-unhandled-signals-v3 2007-07-22 11:03:37 -07:00
taskstats.c taskstats: add context-switch counters 2007-07-16 09:05:46 -07:00
time.c Revert "sys_time() speedup" 2007-07-20 13:32:46 -07:00
timer.c Pull ia64-clocksource into release branch 2007-07-20 11:26:47 -07:00
tsacct.c
uid16.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
user_namespace.c fix create_new_namespaces() return value 2007-07-16 09:05:47 -07:00
user.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
utsname_sysctl.c remove CONFIG_UTS_NS and CONFIG_IPC_NS 2007-07-16 09:05:47 -07:00
utsname.c namespace: ensure clone_flags are always stored in an unsigned long 2007-07-16 09:05:48 -07:00
wait.c Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
workqueue.c destroy_workqueue() can livelock 2007-07-17 10:23:03 -07:00