- 13 9月, 2009 8 次提交
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由 Steven Rostedt 提交于
This patch increases the max string used by predicates to handle KSYM_SYMBOL_LEN. Also moves an include to look nicer. Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Tom Zanussi 提交于
Documentation for event filters and formats. v2 changes: fix a few problems noticed by Randy Dunlap. Reviewed-by: NLi Zefan <lizf@cn.fujitsu.com> Acked-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NTom Zanussi <tzanussi@gmail.com> LKML-Reference: <1252642431.8016.9.camel@tropicana> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
If the correspoding module is unloaded before ftrace_profile_disable() is called, event->profile_disable() won't be called, which can cause oops: # insmod trace-events-sample.ko # perf record -f -a -e sample:foo_bar sleep 3 & # sleep 1 # rmmod trace_events_sample # insmod trace-events-sample.ko OOPS! Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4A9214E3.2070807@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Jiri Olsa 提交于
Only 24 bytes needs to be reserved on the stack for the function graph tracer on x86_64. Signed-off-by: NJiri Olsa <jolsa@redhat.com> LKML-Reference: <20090729085837.GB4998@jolsa.lab.eng.brq.redhat.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 John Reiser 提交于
__start_mcount_loc[] is unused after init, yet occupies RAM forever as part of .rodata. 152kiB is typical on a 64-bit architecture. Instead, __start_mcount_loc should be in the interval [__init_begin, __init_end) so that the space is reclaimed after init. __start_mcount_loc[] is generated during the load portion of kernel build, and is used only by ftrace_init(). ftrace_init is declared '__init' and is in .init.text, which is freed after init. __start_mcount_loc is placed into .rodata by a call to MCOUNT_REC inside the RO_DATA macro of include/asm-generic/vmlinux.lds.h. The array *is* read-only, but more importantly it is not used after init. So the call to MCOUNT_REC should be moved from RO_DATA to INIT_DATA. This patch has been tested on x86_64 with CONFIG_DEBUG_PAGEALLOC=y which verifies that the address range never is accessed after init. Signed-off-by: NJohn Reiser <jreiser@BitWagon.com> LKML-Reference: <4A6DF0B6.7080402@bitwagon.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Carsten Emde 提交于
The state of the function pair tracing_stop()/tracing_start() is correctly considered when tracer data are updated. However, the global and externally accessible variable tracing_max_latency is always updated - even when tracing is stopped. The update should only occur, if tracing was not stopped. Signed-off-by: NCarsten Emde <C.Emde@osadl.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Carsten Emde 提交于
When the nsecs_to_usecs() conversion in probe_wakeup_sched_switch() and check_critical_timing() was moved to a later stage in order to avoid unnecessary computing, it was overlooked to remove the original variables, assignments and comments.. Signed-off-by: NCarsten Emde <C.Emde@osadl.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Carsten Emde 提交于
Booting 2.6.31 and executing echo 1 >/sys/kernel/debug/tracing/events/enable leads to BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c032a583>] ftrace_raw_event_block_bio_bounce+0x4b/0xb9 Apparently, bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask); is called in block/blk-map.c:58 where bio->bi_bdev in set to NULL and still is NULL when an attempt is made to evaluate bio->bi_bdev->bd_dev in include/trace/events/block.h:189. The tracepoint should ensure bio->bi_bdev is not dereferenced, if NULL. Signed-off-by: NCarsten Emde <C.Emde@osadl.org> LKML-Reference: <4AAAC9B1.9060505@osadl.org> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 12 9月, 2009 5 次提交
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由 jolsa@redhat.com 提交于
Convert the writing to 'set_graph_function', 'set_ftrace_filter' and 'set_ftrace_notrace' to use the generic trace_parser 'trace_get_user' function. Removed FTRACE_ITER_CONT flag, since it's not needed after this change. Minor fix in set_graph_function display - g_show function. Signed-off-by: NJiri Olsa <jolsa@redhat.com> LKML-Reference: <1252682969-3366-4-git-send-email-jolsa@redhat.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 jolsa@redhat.com 提交于
Convert the parsing of the file 'set_event' to use the generic trace_praser 'trace_get_user' function. Signed-off-by: NJiri Olsa <jolsa@redhat.com> LKML-Reference: <1252682969-3366-3-git-send-email-jolsa@redhat.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 jolsa@redhat.com 提交于
Create a "trace_parser" that can parse the user space input for separate words. struct trace_parser is the descriptor. Generic "trace_get_user" function that can be a helper to read multiple words passed in by user space. Signed-off-by: NJiri Olsa <jolsa@redhat.com> LKML-Reference: <1252682969-3366-2-git-send-email-jolsa@redhat.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
Both trace_output.c and trace_function_graph.c do basically the same thing to handle the printing of the latency-format. This patch moves the code into one function that both can use. Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
This patch adds the lock depth of the big kernel lock to the generic entry header. This way we can see the depth of the lock and help in removing the BKL. Example: # _------=> CPU# # / _-----=> irqs-off # | / _----=> need-resched # || / _---=> hardirq/softirq # ||| / _--=> preempt-depth # |||| /_--=> lock-depth # |||||/ delay # cmd pid |||||| time | caller # \ / |||||| \ | / <idle>-0 2.N..3 5902255250us+: lock_acquire: read rcu_read_lock <idle>-0 2.N..3 5902255253us+: lock_release: rcu_read_lock <idle>-0 2dN..3 5902255257us+: lock_acquire: xtime_lock <idle>-0 2dN..4 5902255259us : lock_acquire: clocksource_lock <idle>-0 2dN..4 5902255261us+: lock_release: clocksource_lock Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 11 9月, 2009 3 次提交
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由 Steven Rostedt 提交于
The userstack trace required the recording of the tgid entry. Unfortunately, it was added to the generic entry where it wasted 4 bytes of every entry and was only used by one entry. This patch moves it out of the generic field and moves it into the only user (userstack_entry). Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
While debugging something with the function_graph tracer, I found the need to see the preempt count of the traces. Unfortunately, since the function graph tracer has its own output formatting, it does not honor the latency-format option. This patch makes the function_graph tracer honor the latency-format option, but still keeps control of the output. But now we have the same details that the latency-format supplies. # tracer: function_graph # # _-----=> irqs-off # / _----=> need-resched # | / _---=> hardirq/softirq # || / _--=> preempt-depth # ||| / # |||| # CPU|||| DURATION FUNCTION CALLS # | |||| | | | | | | 3) d..1 1.333 us | idle_cpu(); 3) d.h1 | tick_check_idle() { 3) d.h1 0.550 us | tick_check_oneshot_broadcast(); 3) d.h1 | tick_nohz_stop_idle() { 3) d.h1 | ktime_get() { 3) d.h1 | ktime_get_ts() { Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
The dynamic function tracer relys on the macro P6_NOP5 always being an atomic NOP. If for some reason it is changed to be two operations (like a nop2 nop3) it can faults within the kernel when the function tracer modifies the code. This patch adds a comment to note that the P6_NOPs are expected to be atomic. This will hopefully prevent anyone from changing that. Reported-by: NMathieu Desnoyer <mathieu.desnoyers@polymtl.ca> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 10 9月, 2009 6 次提交
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由 Li Zefan 提交于
Move DEFINE_COMPARISON_PRED() and DEFINE_EQUALITY_PRED() to kernel/trace/trace_events_filter.c Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4AA8579B.4020706@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
Remove unused field @stats from struct tracer. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4AA8579B.4020706@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
Fix white-space formatting. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4AA8579B.4020706@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Li Zefan 提交于
Removes unreachable code. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4AA8579B.4020706@cn.fujitsu.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Steven Rostedt 提交于
The wakeup tracer, when enabled, has its own function tracer. It only traces the functions on the CPU where the task it is following is on. If a task is woken on one CPU but then migrates to another CPU before it wakes up, the latency tracer will then start tracing functions on the other CPU. To find which CPU the task is on, the wakeup function tracer performs a task_cpu(wakeup_task). But to make sure the task does not disappear it grabs the wakeup_lock, which is also taken when the task wakes up. By taking this lock, the function tracer does not need to worry about the task being freed as it checks its cpu. Jan Blunck found a problem with this approach on his 32 CPU box. When a task is being traced by the wakeup tracer, all functions take this lock. That means that on all 32 CPUs, each function call is taking this one lock to see if the task is on that CPU. This lock has just serialized all functions on all 32 CPUs. Needless to say, this caused major issues on that box. It would even lockup. This patch changes the wakeup latency to insert a probe on the migrate task tracepoint. When a task changes its CPU that it will run on, the probe will take note. Now the wakeup function tracer no longer needs to take the lock. It only compares the current CPU with a variable that holds the current CPU the task is on. We don't worry about races since it is OK to add or miss a function trace. Reported-by: NJan Blunck <jblunck@suse.de> Tested-by: NJan Blunck <jblunck@suse.de> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 Robert Richter 提交于
rb_buffer_peek() operates with struct ring_buffer_per_cpu *cpu_buffer only. Thus, instead of passing variables buffer and cpu it is better to use cpu_buffer directly. This also reduces the risk of races since cpu_buffer is not calculated twice. Signed-off-by: NRobert Richter <robert.richter@amd.com> LKML-Reference: <1249045084-3028-1-git-send-email-robert.richter@amd.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 06 9月, 2009 18 次提交
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由 Ingo Molnar 提交于
Merge branch 'tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/core
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由 Ingo Molnar 提交于
Merge reason: move from -rc5 to -rc9. Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: sbp2: fix freeing of unallocated memory firewire: ohci: fix Ricoh R5C832, video reception firewire: ohci: fix Agere FW643 and multiple cameras firewire: core: fix crash in iso resource management
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由 Roderick Colenbrander 提交于
This patch fixes a null pointer exception caused by removal of 'ack()' for level interrupts in the Xilinx interrupt driver. A recent change to the xilinx interrupt controller removed the ack hook for level irqs. Signed-off-by: NRoderick Colenbrander <thunderbird2k@gmail.com> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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git://git.infradead.org/~dwmw2/mtd-2.6.31由 Linus Torvalds 提交于
* git://git.infradead.org/~dwmw2/mtd-2.6.31: JFFS2: add missing verify buffer allocation/deallocation mtd: nftl: fix offset alignments mtd: nftl: write support is broken mtd: m25p80: fix null pointer dereference bug
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git://git.kernel.dk/linux-2.6-block由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: Allow changing max_sectors_kb above the default 512
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6由 Linus Torvalds 提交于
* 'fix/oxygen' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: sound: oxygen: handle cards with missing EEPROM sound: oxygen: fix MCLK rate for 192 kHz playback
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: tc: Fix unitialized kernel memory leak pkt_sched: Revert tasklet_hrtimer changes. net: sk_free() should be allowed right after sk_alloc() gianfar: gfar_remove needs to call unregister_netdev() ipw2200: firmware DMA loading rework
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: skcipher - Fix skcipher_dequeue_givcrypt NULL test
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git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq由 Linus Torvalds 提交于
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Re-enable cpufreq suspend and resume code
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6由 Linus Torvalds 提交于
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] fix csum_ipv6_magic() [IA64] Fix warning in dma-mapping.c
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git://oss.sgi.com/xfs/xfs由 Linus Torvalds 提交于
* 'for-linus' of git://oss.sgi.com/xfs/xfs: xfs: actually enable the swapext compat handler
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git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: nilfs2: fix preempt count underflow in nilfs_btnode_prepare_change_key
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: don't assume existence of cpu0
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6由 Linus Torvalds 提交于
* 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: slub: Fix kmem_cache_destroy() with SLAB_DESTROY_BY_RCU
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git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: dm snapshot: fix on disk chunk size validation dm exception store: split set_chunk_size dm snapshot: fix header corruption race on invalidation dm snapshot: refactor zero_disk_area to use chunk_io dm log: userspace add luid to distinguish between concurrent log instances dm raid1: do not allow log_failure variable to unset after being set dm log: remove incorrect field from userspace table output dm log: fix userspace status output dm stripe: expose correct io hints dm table: add more context to terse warning messages dm table: fix queue_limit checking device iterator dm snapshot: implement iterate devices dm multipath: fix oops when request based io fails when no paths
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git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI SR-IOV: correct broken resource alignment calculations
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