Jason Wessel
cc0967490c
x86, hw_breakpoints, kgdb: Fix kgdb to use hw_breakpoint API ...
In the 2.6.33 kernel, the hw_breakpoint API is now used for the
performance event counters. The hw_breakpoint_handler() now
consumes the hw breakpoints that were previously set by kgdb
arch specific code. In order for kgdb to work in conjunction
with this core API change, kgdb must use some of the low level
functions of the hw_breakpoint API to install, uninstall, and
deal with hw breakpoint reservations.
The kgdb core required a change to call kgdb_disable_hw_debug
anytime a slave cpu enters kgdb_wait() in order to keep all the
hw breakpoints in sync as well as to prevent hitting a hw
breakpoint while kgdb is active.
During the architecture specific initialization of kgdb, it will
pre-allocate 4 disabled (struct perf event **) structures. Kgdb
will use these to manage the capabilities for the 4 hw
breakpoint registers, per cpu. Right now the hw_breakpoint API
does not have a way to ask how many breakpoints are available,
on each CPU so it is possible that the install of a breakpoint
might fail when kgdb restores the system to the run state. The
intent of this patch is to first get the basic functionality of
hw breakpoints working and leave it to the person debugging the
kernel to understand what hw breakpoints are in use and what
restrictions have been imposed as a result. Breakpoint
constraints will be dealt with in a future patch.
While atomic, the x86 specific kgdb code will call
arch_uninstall_hw_breakpoint() and arch_install_hw_breakpoint()
to manage the cpu specific hw breakpoints.
The net result of these changes allow kgdb to use the same pool
of hw_breakpoints that are used by the perf event API, but
neither knows about future reservations for the available hw
breakpoint slots.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: kgdb-bugreport@lists.sourceforge.net
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: torvalds@linux-foundation.org
LKML-Reference: <1264719883-7285-2-git-send-email-jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-30 08:42:20 +01:00
microblaze: Enable GCOV_PROFILE_ALL
2009-09-21 14:29:21 +02:00
genirq: Convert irq_desc.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
vt: introduce and use vt_kmsg_redirect() function
2009-12-15 08:53:28 -08:00
clockevent: Don't remove broadcast device when cpu is dead
2010-01-18 14:44:50 +01:00
tracing/filters: Add comment for match callbacks
2010-01-14 22:38:14 -05:00
bsdacct: fix uid/gid misreporting
2009-12-15 08:53:10 -08:00
Audit: send signal info if selinux is disabled
2009-09-24 03:50:26 -04:00
fix more leaks in audit_tree.c tag_chunk()
2009-12-19 09:27:43 -08:00
Audit: reorganize struct audit_watch to save 8 bytes
2009-09-24 03:50:25 -04:00
Sanitize f_flags helpers
2009-12-22 12:27:34 -05:00
kbuild: move bounds.h to include/generated
2009-12-12 13:08:14 +01:00
remove CONFIG_SECURITY_FILE_CAPABILITIES compile option
2009-11-24 15:06:47 +11:00
cgroups: fix 2.6.32 regression causing BUG_ON() in cgroup_diput()
2010-01-11 09:34:05 -08:00
cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time
2009-09-24 07:20:58 -07:00
sched: Fix set_cpu_active() in cpu_down()
2009-12-16 19:01:53 +01:00
sched: Fix balance vs hotplug race
2009-12-06 21:10:56 +01:00
creds_are_invalid() needs to be exported for use by modules:
2009-09-23 11:02:26 -07:00
headers: taskstats_kern.h trim
2009-09-18 09:48:52 -07:00
do_wait() optimization: do not place sub-threads on task_struct->children list
2009-12-17 15:45:31 -08:00
do_wait() optimization: do not place sub-threads on task_struct->children list
2009-12-17 15:45:31 -08:00
futexes: Remove rw parameter from get_futex_key()
2010-01-13 09:17:36 +01:00
hrtimers: Convert to raw_spinlocks
2009-12-14 23:55:34 +01:00
softlockup: Fix hung_task_check_count sysctl
2009-11-27 06:21:57 +01:00
hw_breakpoints: Release the bp slot if arch_validate_hwbkpt_settings() fails.
2010-01-28 14:15:51 +01:00
itimers: Fix racy writes to cpu_itimer fields
2009-11-18 16:32:12 +01:00
hw-breakpoints: Fix broken hw-breakpoint sample module
2009-11-10 11:23:29 +01:00
mutex: Better control mutex adaptive spinning config
2009-12-03 11:50:11 +01:00
Merge git://git.infradead.org/~dwmw2/mtd-2.6.33
2010-01-24 10:31:34 -08:00
kfifo: document everywhere that size has to be power of two
2010-01-16 12:15:38 -08:00
x86, hw_breakpoints, kgdb: Fix kgdb to use hw_breakpoint API
2010-01-30 08:42:20 +01:00
kmod: fix resource leak in call_usermodehelper_pipe()
2010-01-11 09:34:04 -08:00
kprobes: Fix distinct type warning
2009-12-28 10:25:31 +01:00
kexec: premit reduction of the reserved memory size
2009-12-16 07:20:13 -08:00
sched: Move kthread_bind() back to kthread.c
2009-12-16 19:01:57 +01:00
locking: Convert __raw_spin* functions to arch_spin*
2009-12-14 23:55:32 +01:00
seq_file: constify seq_operations
2009-09-23 07:39:29 -07:00
Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2009-12-08 08:02:38 -08:00
modules: Skip empty sections when exporting section notes
2010-01-06 01:11:29 -08:00
headers: remove sched.h from interrupt.h
2009-10-11 11:20:58 -07:00
locking: Implement new raw_spinlock
2009-12-14 23:55:32 +01:00
mutex: Better control mutex adaptive spinning config
2009-12-03 11:50:11 +01:00
kprobes: Fix to add __kprobes to notify_die
2009-08-30 03:08:26 +02:00
cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time
2009-09-24 07:20:58 -07:00
kmsg_dump: Dump on crash_kexec as well
2009-12-31 19:45:04 +00:00
tree-wide: convert open calls to remove spaces to skip_spaces() lib function
2009-12-15 08:53:32 -08:00
perf: Honour event state for aux stream data
2010-01-21 13:40:40 +01:00
pid: reduce code size by using a pointer to iterate over array
2009-12-16 07:20:12 -08:00
pidns: deny CLONE_PARENT|CLONE_NEWPID combination
2009-09-24 07:21:04 -07:00
pm_qos: clean up racy global "name" variable
2009-10-14 15:31:10 +02:00
posix-cpu-timers: optimize and document timer_create callback
2009-11-18 12:36:05 +01:00
time: Introduce CLOCK_REALTIME_COARSE
2009-08-21 21:43:46 +02:00
Merge git://git.infradead.org/~dwmw2/mtd-2.6.33
2010-01-24 10:31:34 -08:00
kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file
2009-09-20 20:15:40 +02:00
ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee
2009-09-24 07:20:59 -07:00
rcu: Re-arrange code to reduce #ifdef pain
2009-11-22 18:58:16 +01:00
rcu: Eliminate unneeded function wrapping
2009-11-22 18:58:16 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
rcu: Add expedited grace-period support for preemptible RCU
2009-12-03 11:35:25 +01:00
const: constify remaining pipe_buf_operations
2009-12-16 07:20:05 -08:00
memcg: some modification to softlimit under hierarchical memory reclaim.
2009-10-01 16:11:13 -07:00
resources: fix call to alignf() in allocate_resource()
2009-12-21 10:42:29 -08:00
sched: Convert pi_lock to raw_spinlock
2009-12-14 23:55:33 +01:00
rtmutes: Convert rtmutex.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched: Reassign prev and switch_count when reacquire_kernel_lock() fail
2010-01-21 13:39:04 +01:00
sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
2009-12-15 09:04:36 +01:00
sched: Convert cpupri lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched: Convert cpupri lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched: Convert rq->lock to raw_spinlock
2009-12-14 23:55:33 +01:00
sched: Fix vmark regression on big machines
2010-01-21 13:39:03 +01:00
sched: Discard some old bits
2009-12-09 10:03:07 +01:00
sched: Restore printk sanity
2009-12-20 19:05:02 +01:00
sched: Add pre and post wakeup hooks
2009-12-16 19:01:58 +01:00
kernel/signal.c: fix kernel information leak with print-fatal-signals=1
2010-01-11 09:34:05 -08:00
SLOW_WORK: Move slow_work's proc file to debugfs
2009-12-01 08:20:31 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6
2009-12-08 07:38:50 -08:00
SLOW_WORK: Move slow_work's proc file to debugfs
2009-12-01 08:20:31 -08:00
smp_call_function_any(): pass the node value to cpumask_of_node()
2010-01-16 12:15:39 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2009-12-14 09:58:24 -08:00
percpu: make percpu symbols under kernel/ and mm/ unique
2009-10-29 22:34:13 +09:00
locking: Cleanup the name space completely
2009-12-14 23:55:33 +01:00
rcu: Add synchronize_srcu_expedited()
2009-10-26 09:40:30 +01:00
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-19 09:47:34 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2009-12-08 07:55:01 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
2009-12-17 16:58:26 -08:00
SYSCTL: Print binary sysctl warnings (nearly) only once
2009-12-23 21:00:20 +01:00
ipv4 05/05: add sysctl to accept packets with local source addresses
2009-12-03 12:14:38 -08:00
Revert "time: Remove xtime_cache"
2009-12-22 14:10:37 -08:00
perf: Fix perf_event_do_pending() fallback callsite
2010-01-21 13:40:39 +01:00
trivial: fix typo "to to" in multiple files
2009-09-21 15:14:55 +02:00
headers: utsname.h redux
2009-09-23 18:13:10 -07:00
core: Clean up user return notifers use of per_cpu
2009-12-02 10:22:59 +01:00
uids: Prevent tear down race
2009-11-02 16:02:39 +01:00
sysctl kernel: Remove binary sysctl logic
2009-11-12 02:04:55 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2009-12-10 09:35:44 -08:00
cc0967490c