Steven Rostedt
f42ac38c59
ftrace: disable tracing for suspend to ram ...
I've been painstakingly debugging the issue with suspend to ram and
ftraced. The 2.6.28 code does not have this issue, but since the mcount
recording is not going to be in 27, this must be solved for the ftrace
daemon version.
The resume from suspend to ram would reboot because it was triple
faulting. Debugging further, I found that calling the mcount function
itself was not an issue, but it would fault when it incremented
preempt_count. preempt_count is on the tasks info structure that is on the
low memory address of the task's stack. For some reason, it could not
write to it. Resuming out of suspend to ram does quite a lot of funny
tricks to get to work, so it is not surprising at all that simply doing a
preempt_disable() would cause a fault.
Thanks to Rafael for suggesting to add a "while (1);" to find the place in
resuming that is causing the fault. I would place the loop somewhere in
the code, compile and reboot and see if it would either reboot (hit the
fault) or simply hang (hit the loop). Doing this over and over again, I
narrowed it down that it was happening in enable_nonboot_cpus.
At this point, I found that it is easier to simply disable tracing around
the suspend code, instead of searching for the particular function that
can not handle doing a preempt_disable.
This patch disables the tracer as it suspends and reenables it on resume.
I tested this patch on my Laptop, and it can resume fine with the patch.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-27 13:54:20 -07:00
genirq: switch /proc/irq/*/smp_affinity et al to seqfiles
2008-08-12 16:07:30 -07:00
ftrace: disable tracing for suspend to ram
2008-08-27 13:54:20 -07:00
nohz: fix wrong event handler after online an offlined cpu
2008-08-21 09:54:06 +02:00
Merge branch 'linus' into cpus4096
2008-07-28 23:32:00 +02:00
Update kernel/.gitignore with new auto-generated files
2008-02-09 23:27:01 -08:00
bsdacct: fix and add comments around acct_process()
2008-07-25 10:53:47 -07:00
[PATCH] Fix the bug of using AUDIT_STATUS_RATE_LIMIT when set fail, no error output.
2008-08-01 12:15:16 -04:00
[PATCH 1/2] audit: move extern declarations to audit.h
2008-04-28 06:28:04 -04:00
[PATCH] list_for_each_rcu must die: audit
2008-05-17 03:30:23 -04:00
Re: [PATCH] the loginuid field should be output in all AUDIT_CONFIG_CHANGE audit messages
2008-08-01 12:15:03 -04:00
Re: [PATCH] Fix the kernel panic of audit_filter_task when key field is set
2008-08-04 06:13:50 -04:00
backtrace: replace timer with tasklet + completions
2008-06-27 18:09:16 +02:00
Add kbuild.h that contains common definitions for kbuild users
2008-04-29 08:06:29 -07:00
security: Fix setting of PF_SUPERPRIV by __capable()
2008-08-14 22:59:43 +10:00
cgroup: uninline cgroup_has_css_refs()
2008-07-30 09:41:44 -07:00
CGroup API files: move "releasable" to cgroup_debug subsystem
2008-04-29 08:06:09 -07:00
ntp: support for TAI
2008-05-01 08:03:59 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
cpu hotplug: s390 doesn't support additional_cpus anymore.
2008-08-12 16:07:28 -07:00
cpuset: clean up cpuset hierarchy traversal code
2008-07-30 09:41:44 -07:00
per-task-delay-accounting: update taskstats for memory reclaim delay
2008-07-25 10:53:47 -07:00
DMA: make dma-coherent.c documentation kdoc-friendly
2008-08-07 06:52:01 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
[PATCH] kill altroot
2008-07-26 20:53:20 -04:00
tracehook: fix exit_signal=0 case
2008-08-01 12:01:11 -07:00
mmu-notifiers: core
2008-07-28 16:30:21 -07:00
futexes: fix fault handling in futex_lock_pi
2008-06-23 13:31:15 +02:00
futex_compat __user annotation
2008-03-30 14:18:41 -07:00
Merge branch 'generic-ipi' into generic-ipi-for-linus
2008-07-15 21:55:59 +02:00
ITIMER_REAL: convert to use struct pid
2008-02-08 09:22:29 -08:00
kallsyms: fix potential overflow in binary search
2008-07-25 10:53:27 -07:00
sched: fix SCHED_HRTICK dependency
2008-07-28 14:37:38 +02:00
rcu: move PREEMPT_RCU config option back under PREEMPT
2008-03-10 18:01:20 -07:00
kexec: use a mutex for locking rather than xchg()
2008-08-15 08:35:43 -07:00
kgdb: fix gdb serial thread queries
2008-08-01 08:39:35 -05:00
call_usermodehelper(): increase reliability
2008-07-25 10:53:28 -07:00
kprobes: remove redundant config check
2008-07-25 10:53:30 -07:00
tracehook: wait_task_inactive
2008-07-26 12:00:09 -07:00
kernel: use non-racy method for proc entries creation
2008-04-29 08:06:22 -07:00
lockdep: fix spurious 'inconsistent lock state' warning
2008-08-18 09:42:31 +02:00
lockdep: build fix
2008-08-13 12:55:10 +02:00
lockdep: fix build if CONFIG_PROVE_LOCKING not defined
2008-08-15 19:22:04 +02:00
Merge branch 'linus' into core/generic-dma-coherent
2008-07-29 00:07:55 +02:00
markers: fix markers read barrier for multiple probes
2008-07-30 09:41:45 -07:00
[module] Don't let gcc inline load_module()
2008-08-25 11:10:26 -07:00
mutex-debug: check mutex magic before owner
2008-05-16 16:53:35 +02:00
locking: fix mutex @key parameter kernel-doc notation
2008-07-28 18:12:36 +02:00
ipc: re-enable msgmni automatic recomputing msgmni if set to negative
2008-04-29 08:06:13 -07:00
cgroup_clone: use pid of newly created task for new cgroup
2008-07-25 10:53:37 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
Add a WARN() macro; this is WARN_ON() + printk arguments
2008-07-25 10:53:29 -07:00
Add new string functions strict_strto* and convert kernel params to use them
2008-02-08 09:22:41 -08:00
pidns: remove now unused find_pid function.
2008-07-25 10:53:45 -07:00
bsdacct: switch from global bsd_acct_struct instance to per-pidns one
2008-07-25 10:53:47 -07:00
pm_qos: spelling fixes
2008-08-05 14:33:50 -07:00
posix-timers: print RT watchdog message
2008-05-24 18:49:22 +02:00
Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-08-11 16:46:11 -07:00
printk: fix comment for printk ratelimiting
2008-07-30 09:41:45 -07:00
build kernel/profile.o only when requested
2008-07-25 10:53:27 -07:00
security: Fix setting of PF_SUPERPRIV by __capable()
2008-08-14 22:59:43 +10:00
stop_machine: Wean existing callers off stop_machine_run()
2008-07-28 12:16:31 +10:00
rcu: fix synchronize_rcu() so that kernel-doc works
2008-08-21 09:31:44 +02:00
Merge branch 'linus' into cpus4096
2008-07-16 00:29:07 +02:00
rcu: remove duplicated include in kernel/rcupreempt_trace.c
2008-05-19 10:03:39 +02:00
rcu: make rcutorture even more vicious: invoke RCU readers from irq handlers (timers)
2008-06-26 09:24:33 +02:00
relay: fix "full buffer with exactly full last subbuffer" accounting problem
2008-08-05 14:33:46 -07:00
cgroup files: convert res_counter_write() to be a cgroups write_string() handler
2008-07-25 10:53:36 -07:00
resource: add resource_size()
2008-07-30 09:41:43 -07:00
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
sysdev: Pass the attribute to the low level sysdev show/store function
2008-07-21 21:55:02 -07:00
hrtimer: more hrtimer_init_sleeper() fallout.
2008-02-13 15:45:36 +01:00
Don't operate with pid_t in rtmutex tester
2008-02-08 09:22:41 -08:00
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-08-16 17:15:32 -07:00
sched_clock: fix cpu_clock()
2008-08-25 17:39:57 +02:00
sched: use a 2-d bitmap for searching lowest-pri CPU
2008-06-06 15:19:28 +02:00
sched: fix the cpuprio count really
2008-06-06 15:19:44 +02:00
sched: add full schedstats to /proc/sched_debug
2008-06-27 14:31:31 +02:00
sched: fix mysql+oltp regression
2008-08-11 14:49:29 +02:00
sched: enable LB_BIAS by default
2008-08-21 08:18:02 +02:00
sched: make rt_sched_class, idle_sched_class static
2008-05-05 23:56:17 +02:00
sched: fix rt-bandwidth hotplug race
2008-08-14 15:50:58 +02:00
sched: fix accounting in task delay accounting & migration
2008-07-04 12:50:23 +02:00
semaphore: __down_common: use signal_pending_state()
2008-08-05 14:33:47 -07:00
tracehook: fix SA_NOCLDWAIT
2008-08-19 20:37:07 -07:00
generic-ipi: fix stack and rcu interaction bug in smp_call_function_mask(), fix
2008-08-12 11:21:27 +02:00
Full conversion to early_initcall() interface, remove old interface
2008-07-26 12:00:04 -07:00
Full conversion to early_initcall() interface, remove old interface
2008-07-26 12:00:04 -07:00
lockdep: spin_lock_nest_lock(), checkpatch fixes
2008-08-13 13:56:51 +02:00
make srcu_readers_active() static
2008-02-06 10:41:02 -08:00
stacktrace: fix modular build, export print_stack_trace and save_stack_trace
2008-06-30 09:20:55 +02:00
stop_machine: remove unused variable
2008-08-12 17:52:55 +10:00
fix setpriority(PRIO_PGRP) thread iterator breakage
2008-08-20 15:40:32 -07:00
signalfd: fix undefined reference to `compat_sys_signalfd4' when !CONFIG_SIGNALFD
2008-07-25 11:35:41 -07:00
lost sysctl fix
2008-07-27 09:45:34 -07:00
sysctl: check for bogus modes
2008-07-25 10:53:45 -07:00
taskstats: remove initialization of static per-cpu variable
2008-07-25 10:53:47 -07:00
kprobes: kretprobe user entry-handler
2008-02-06 10:41:11 -08:00
Make constants in kernel/timeconst.h fixed 64 bits
2008-05-02 16:18:42 -07:00
Make constants in kernel/timeconst.h fixed 64 bits
2008-05-02 16:18:42 -07:00
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
2008-07-14 16:06:58 -07:00
task IO accounting: move all IO statistics in struct task_io_accounting
2008-07-27 16:12:28 -07:00
asmlinkage_protect replaces prevent_tail_call
2008-04-10 17:28:26 -07:00
alloc_uid: cleanup
2008-04-30 08:29:53 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
removed unused #include <linux/version.h>'s
2008-08-23 12:14:12 -07:00
kernel: remove fastcall in kernel/*
2008-02-08 09:22:31 -08:00
Merge branch 'core/locking' into core/urgent
2008-08-12 00:11:49 +02:00
f42ac38c59