Merge reason: Pick up kernel/softirq.c update for dependent fix.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Event Tracing
Documentation written by Theodore Ts'o
- Updated by Li Zefan
+ Updated by Li Zefan and Tom Zanussi
1. Introduction
===============
---------------------------------
The events which are available for tracing can be found in the file
- /debug/tracing/available_events.
+ /sys/kernel/debug/tracing/available_events.
To enable a particular event, such as 'sched_wakeup', simply echo it
- to /debug/tracing/set_event. For example:
+ to /sys/kernel/debug/tracing/set_event. For example:
- # echo sched_wakeup >> /debug/tracing/set_event
+ # echo sched_wakeup >> /sys/kernel/debug/tracing/set_event
[ Note: '>>' is necessary, otherwise it will firstly disable
all the events. ]
To disable an event, echo the event name to the set_event file prefixed
with an exclamation point:
- # echo '!sched_wakeup' >> /debug/tracing/set_event
+ # echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event
To disable all events, echo an empty line to the set_event file:
- # echo > /debug/tracing/set_event
+ # echo > /sys/kernel/debug/tracing/set_event
To enable all events, echo '*:*' or '*:' to the set_event file:
- # echo *:* > /debug/tracing/set_event
+ # echo *:* > /sys/kernel/debug/tracing/set_event
The events are organized into subsystems, such as ext4, irq, sched,
etc., and a full event name looks like this: <subsystem>:<event>. The
"<subsystem>:*"; for example, to enable all irq events, you can use the
command:
- # echo 'irq:*' > /debug/tracing/set_event
+ # echo 'irq:*' > /sys/kernel/debug/tracing/set_event
2.2 Via the 'enable' toggle
---------------------------
- The events available are also listed in /debug/tracing/events/ hierarchy
+ The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy
of directories.
To enable event 'sched_wakeup':
- # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To disable it:
- # echo 0 > /debug/tracing/events/sched/sched_wakeup/enable
+ # echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To enable all events in sched subsystem:
- # echo 1 > /debug/tracing/events/sched/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/sched/enable
To eanble all events:
- # echo 1 > /debug/tracing/events/enable
+ # echo 1 > /sys/kernel/debug/tracing/events/enable
When reading one of these enable files, there are four results:
See The example provided in samples/trace_events
+4. Event formats
+================
+
+Each trace event has a 'format' file associated with it that contains
+a description of each field in a logged event. This information can
+be used to parse the binary trace stream, and is also the place to
+find the field names that can be used in event filters (see section 5).
+
+It also displays the format string that will be used to print the
+event in text mode, along with the event name and ID used for
+profiling.
+
+Every event has a set of 'common' fields associated with it; these are
+the fields prefixed with 'common_'. The other fields vary between
+events and correspond to the fields defined in the TRACE_EVENT
+definition for that event.
+
+Each field in the format has the form:
+
+ field:field-type field-name; offset:N; size:N;
+
+where offset is the offset of the field in the trace record and size
+is the size of the data item, in bytes.
+
+For example, here's the information displayed for the 'sched_wakeup'
+event:
+
+# cat /debug/tracing/events/sched/sched_wakeup/format
+
+name: sched_wakeup
+ID: 60
+format:
+ field:unsigned short common_type; offset:0; size:2;
+ field:unsigned char common_flags; offset:2; size:1;
+ field:unsigned char common_preempt_count; offset:3; size:1;
+ field:int common_pid; offset:4; size:4;
+ field:int common_tgid; offset:8; size:4;
+
+ field:char comm[TASK_COMM_LEN]; offset:12; size:16;
+ field:pid_t pid; offset:28; size:4;
+ field:int prio; offset:32; size:4;
+ field:int success; offset:36; size:4;
+ field:int cpu; offset:40; size:4;
+
+print fmt: "task %s:%d [%d] success=%d [%03d]", REC->comm, REC->pid,
+ REC->prio, REC->success, REC->cpu
+
+This event contains 10 fields, the first 5 common and the remaining 5
+event-specific. All the fields for this event are numeric, except for
+'comm' which is a string, a distinction important for event filtering.
+
+5. Event filtering
+==================
+
+Trace events can be filtered in the kernel by associating boolean
+'filter expressions' with them. As soon as an event is logged into
+the trace buffer, its fields are checked against the filter expression
+associated with that event type. An event with field values that
+'match' the filter will appear in the trace output, and an event whose
+values don't match will be discarded. An event with no filter
+associated with it matches everything, and is the default when no
+filter has been set for an event.
+
+5.1 Expression syntax
+---------------------
+
+A filter expression consists of one or more 'predicates' that can be
+combined using the logical operators '&&' and '||'. A predicate is
+simply a clause that compares the value of a field contained within a
+logged event with a constant value and returns either 0 or 1 depending
+on whether the field value matched (1) or didn't match (0):
+
+ field-name relational-operator value
+
+Parentheses can be used to provide arbitrary logical groupings and
+double-quotes can be used to prevent the shell from interpreting
+operators as shell metacharacters.
+
+The field-names available for use in filters can be found in the
+'format' files for trace events (see section 4).
+
+The relational-operators depend on the type of the field being tested:
+
+The operators available for numeric fields are:
+
+==, !=, <, <=, >, >=
+
+And for string fields they are:
+
+==, !=
+
+Currently, only exact string matches are supported.
+
+Currently, the maximum number of predicates in a filter is 16.
+
+5.2 Setting filters
+-------------------
+
+A filter for an individual event is set by writing a filter expression
+to the 'filter' file for the given event.
+
+For example:
+
+# cd /debug/tracing/events/sched/sched_wakeup
+# echo "common_preempt_count > 4" > filter
+
+A slightly more involved example:
+
+# cd /debug/tracing/events/sched/sched_signal_send
+# echo "((sig >= 10 && sig < 15) || sig == 17) && comm != bash" > filter
+
+If there is an error in the expression, you'll get an 'Invalid
+argument' error when setting it, and the erroneous string along with
+an error message can be seen by looking at the filter e.g.:
+
+# cd /debug/tracing/events/sched/sched_signal_send
+# echo "((sig >= 10 && sig < 15) || dsig == 17) && comm != bash" > filter
+-bash: echo: write error: Invalid argument
+# cat filter
+((sig >= 10 && sig < 15) || dsig == 17) && comm != bash
+^
+parse_error: Field not found
+
+Currently the caret ('^') for an error always appears at the beginning of
+the filter string; the error message should still be useful though
+even without more accurate position info.
+
+5.3 Clearing filters
+--------------------
+
+To clear the filter for an event, write a '0' to the event's filter
+file.
+
+To clear the filters for all events in a subsystem, write a '0' to the
+subsystem's filter file.
+
+5.3 Subsystem filters
+---------------------
+
+For convenience, filters for every event in a subsystem can be set or
+cleared as a group by writing a filter expression into the filter file
+at the root of the subsytem. Note however, that if a filter for any
+event within the subsystem lacks a field specified in the subsystem
+filter, or if the filter can't be applied for any other reason, the
+filter for that event will retain its previous setting. This can
+result in an unintended mixture of filters which could lead to
+confusing (to the user who might think different filters are in
+effect) trace output. Only filters that reference just the common
+fields can be guaranteed to propagate successfully to all events.
+
+Here are a few subsystem filter examples that also illustrate the
+above points:
+
+Clear the filters on all events in the sched subsytem:
+
+# cd /sys/kernel/debug/tracing/events/sched
+# echo 0 > filter
+# cat sched_switch/filter
+none
+# cat sched_wakeup/filter
+none
+
+Set a filter using only common fields for all events in the sched
+subsytem (all events end up with the same filter):
+
+# cd /sys/kernel/debug/tracing/events/sched
+# echo common_pid == 0 > filter
+# cat sched_switch/filter
+common_pid == 0
+# cat sched_wakeup/filter
+common_pid == 0
+
+Attempt to set a filter using a non-common field for all events in the
+sched subsytem (all events but those that have a prev_pid field retain
+their old filters):
+
+# cd /sys/kernel/debug/tracing/events/sched
+# echo prev_pid == 0 > filter
+# cat sched_switch/filter
+prev_pid == 0
+# cat sched_wakeup/filter
+common_pid == 0
AMSO1100 RNIC DRIVER
M: Tom Tucker <tom@opengridcomputing.com>
M: Steve Wise <swise@opengridcomputing.com>
- L: general@lists.openfabrics.org
+ L: linux-rdma@vger.kernel.org
S: Maintained
F: drivers/infiniband/hw/amso1100/
W: http://maxim.org.za/at91_26.html
S: Maintained
+ ARM/BCMRING ARM ARCHITECTURE
+ M: Leo Chen <leochen@broadcom.com>
+ M: Scott Branden <sbranden@broadcom.com>
+ L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
+ S: Maintained
+ F: arch/arm/mach-bcmring
+
+ ARM/BCMRING MTD NAND DRIVER
+ M: Leo Chen <leochen@broadcom.com>
+ M: Scott Branden <sbranden@broadcom.com>
+ L: linux-mtd@lists.infradead.org
+ S: Maintained
+ F: drivers/mtd/nand/bcm_umi_nand.c
+ F: drivers/mtd/nand/bcm_umi_bch.c
+ F: drivers/mtd/nand/bcm_umi_hamming.c
+ F: drivers/mtd/nand/nand_bcm_umi.h
+
ARM/CIRRUS LOGIC EP93XX ARM ARCHITECTURE
- M: Lennert Buytenhek <kernel@wantstofly.org>
+ M: Hartley Sweeten <hsweeten@visionengravers.com>
+ M: Ryan Mallon <ryan@bluewatersys.com>
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained
+ F: arch/arm/mach-ep93xx/
+ F: arch/arm/mach-ep93xx/include/mach/
ARM/CIRRUS LOGIC EDB9315A MACHINE SUPPORT
M: Lennert Buytenhek <kernel@wantstofly.org>
M: Philipp Zabel <philipp.zabel@gmail.com>
S: Maintained
+ ARM/Marvell Loki/Kirkwood/MV78xx0/Orion SOC support
+ M: Lennert Buytenhek <buytenh@marvell.com>
+ M: Nicolas Pitre <nico@marvell.com>
+ L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
+ T: git git://git.marvell.com/orion
+ S: Maintained
+ F: arch/arm/mach-loki/
+ F: arch/arm/mach-kirkwood/
+ F: arch/arm/mach-mv78xx0/
+ F: arch/arm/mach-orion5x/
+ F: arch/arm/plat-orion/
+
ARM/MIOA701 MACHINE SUPPORT
M: Robert Jarzmik <robert.jarzmik@free.fr>
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
M: Bob Copeland <me@bobcopeland.com>
L: linux-wireless@vger.kernel.org
L: ath5k-devel@lists.ath5k.org
+ W: http://wireless.kernel.org/en/users/Drivers/ath5k
S: Maintained
F: drivers/net/wireless/ath/ath5k/
M: Senthil Balasubramanian <senthilkumar@atheros.com>
L: linux-wireless@vger.kernel.org
L: ath9k-devel@lists.ath9k.org
+ W: http://wireless.kernel.org/en/users/Drivers/ath9k
S: Supported
F: drivers/net/wireless/ath/ath9k/
CXGB3 IWARP RNIC DRIVER (IW_CXGB3)
M: Steve Wise <swise@chelsio.com>
- L: general@lists.openfabrics.org
+ L: linux-rdma@vger.kernel.org
W: http://www.openfabrics.org
S: Supported
F: drivers/infiniband/hw/cxgb3/
EHCA (IBM GX bus InfiniBand adapter) DRIVER
M: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
M: Christoph Raisch <raisch@de.ibm.com>
- L: general@lists.openfabrics.org
+ L: linux-rdma@vger.kernel.org
S: Supported
F: drivers/infiniband/hw/ehca/
F: fs/fscache/
F: include/linux/fscache*.h
-FTRACE
+TRACING
M: Steven Rostedt <rostedt@goodmis.org>
+M: Frederic Weisbecker <fweisbec@gmail.com>
+M: Ingo Molnar <mingo@redhat.com>
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git tracing/core
S: Maintained
F: Documentation/trace/ftrace.txt
F: arch/*/*/*/ftrace.h
F: arch/*/kernel/ftrace.c
-F: include/*/ftrace.h
+F: include/*/ftrace.h include/trace/ include/linux/trace*.h
F: kernel/trace/
FUJITSU FR-V (FRV) PORT
S: Maintained
F: include/asm-generic
+ GENERIC UIO DRIVER FOR PCI DEVICES
+ M: Michael S. Tsirkin <mst@redhat.com>
+ L: kvm@vger.kernel.org
+ L: linux-kernel@vger.kernel.org
+ S: Supported
+ F: drivers/uio/uio_pci_generic.c
+
GFS2 FILE SYSTEM
M: Steven Whitehouse <swhiteho@redhat.com>
L: cluster-devel@redhat.com
M: Roland Dreier <rolandd@cisco.com>
M: Sean Hefty <sean.hefty@intel.com>
M: Hal Rosenstock <hal.rosenstock@gmail.com>
- L: general@lists.openfabrics.org (moderated for non-subscribers)
+ L: linux-rdma@vger.kernel.org
W: http://www.openib.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband.git
S: Supported
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
M: Zhu Yi <yi.zhu@intel.com>
- M: James Ketrenos <jketreno@linux.intel.com>
M: Reinette Chatre <reinette.chatre@intel.com>
+ M: Intel Linux Wireless <ilw@linux.intel.com>
L: linux-wireless@vger.kernel.org
- L: ipw2100-devel@lists.sourceforge.net
- W: http://lists.sourceforge.net/mailman/listinfo/ipw2100-devel
W: http://ipw2100.sourceforge.net
- S: Supported
+ S: Odd Fixes
F: Documentation/networking/README.ipw2100
F: drivers/net/wireless/ipw2x00/ipw2100.*
INTEL PRO/WIRELESS 2915ABG NETWORK CONNECTION SUPPORT
M: Zhu Yi <yi.zhu@intel.com>
- M: James Ketrenos <jketreno@linux.intel.com>
M: Reinette Chatre <reinette.chatre@intel.com>
+ M: Intel Linux Wireless <ilw@linux.intel.com>
L: linux-wireless@vger.kernel.org
- L: ipw2100-devel@lists.sourceforge.net
- W: http://lists.sourceforge.net/mailman/listinfo/ipw2100-devel
W: http://ipw2200.sourceforge.net
- S: Supported
+ S: Odd Fixes
F: Documentation/networking/README.ipw2200
F: drivers/net/wireless/ipw2x00/ipw2200.*
INTEL WIRELESS WIFI LINK (iwlwifi)
M: Zhu Yi <yi.zhu@intel.com>
M: Reinette Chatre <reinette.chatre@intel.com>
+ M: Intel Linux Wireless <ilw@linux.intel.com>
L: linux-wireless@vger.kernel.org
- L: ipw3945-devel@lists.sourceforge.net
W: http://intellinuxwireless.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-2.6.git
S: Supported
IPATH DRIVER
M: Ralph Campbell <infinipath@qlogic.com>
- L: general@lists.openfabrics.org
+ L: linux-rdma@vger.kernel.org
T: git git://git.qlogic.com/ipath-linux-2.6
S: Supported
F: drivers/infiniband/hw/ipath/
KERNEL VIRTUAL MACHINE (KVM)
M: Avi Kivity <avi@redhat.com>
+ M: Marcelo Tosatti <mtosatti@redhat.com>
L: kvm@vger.kernel.org
W: http://kvm.qumranet.com
S: Supported
F: drivers/net/mv643xx_eth.*
F: include/linux/mv643xx.h
+ MARVELL MWL8K WIRELESS DRIVER
+ M: Lennert Buytenhek <buytenh@marvell.com>
+ L: linux-wireless@vger.kernel.org
+ S: Supported
+ F: drivers/net/wireless/mwl8k.c
+
MARVELL SOC MMC/SD/SDIO CONTROLLER DRIVER
- M: Nicolas Pitre <nico@cam.org>
+ M: Nicolas Pitre <nico@fluxnic.net>
S: Maintained
MARVELL YUKON / SYSKONNECT DRIVER
NETEFFECT IWARP RNIC DRIVER (IW_NES)
M: Faisal Latif <faisal.latif@intel.com>
M: Chien Tung <chien.tin.tung@intel.com>
- L: general@lists.openfabrics.org
+ L: linux-rdma@vger.kernel.org
W: http://www.neteffect.com
S: Supported
F: drivers/infiniband/hw/nes/
L: linux-wireless@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6.git
S: Maintained
+ F: net/mac80211/
+ F: net/rfkill/
F: net/wireless/
F: include/net/ieee80211*
F: include/linux/wireless.h
+ F: drivers/net/wireless/
NETWORKING DRIVERS
L: netdev@vger.kernel.org
F: drivers/block/pktcdvd.c
F: include/linux/pktcdvd.h
+ PMC SIERRA MaxRAID DRIVER
+ P: Anil Ravindranath
+ M: anil_ravindranath@pmc-sierra.com
+ L: linux-scsi@vger.kernel.org
+ W: http://www.pmc-sierra.com/
+ S: Supported
+ F: drivers/scsi/pmcraid.*
+
POSIX CLOCKS and TIMERS
M: Thomas Gleixner <tglx@linutronix.de>
S: Supported
W: http://linuxwireless.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
S: Maintained
- F: drivers/net/wireless/rtl818*
+ F: drivers/net/wireless/rtl818x/rtl8180*
RTL8187 WIRELESS DRIVER
M: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
F: include/scsi/sg.h
SCSI SUBSYSTEM
- M: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
+ M: "James E.J. Bottomley" <James.Bottomley@suse.de>
L: linux-scsi@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6.git
F: drivers/net/benet/
SFC NETWORK DRIVER
- P: Steve Hodgson
- P: Ben Hutchings
- M: Robert Stonehouse <linux-net-drivers@solarflare.com>
+ M: Solarflare linux maintainers <linux-net-drivers@solarflare.com>
+ M: Steve Hodgson <shodgson@solarflare.com>
+ M: Ben Hutchings <bhutchings@solarflare.com>
+ L: netdev@vger.kernel.org
S: Supported
F: drivers/net/sfc/
F: mm/sl?b.c
SMC91x ETHERNET DRIVER
- M: Nicolas Pitre <nico@cam.org>
+ M: Nicolas Pitre <nico@fluxnic.net>
S: Maintained
F: drivers/net/smc91x.*
S: Maintained
F: drivers/input/misc/wistron_btns.c
+ WL1251 WIRELESS DRIVER
+ P: Kalle Valo
+ M: kalle.valo@nokia.com
+ L: linux-wireless@vger.kernel.org
+ W: http://wireless.kernel.org
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
+ S: Maintained
+ F: drivers/net/wireless/wl12xx/*
+ X: drivers/net/wireless/wl12xx/wl1271*
+
+ WL1271 WIRELESS DRIVER
+ M: Luciano Coelho <luciano.coelho@nokia.com>
+ L: linux-wireless@vger.kernel.org
+ W: http://wireless.kernel.org
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
+ S: Maintained
+ F: drivers/net/wireless/wl12xx/wl1271*
+
WL3501 WIRELESS PCMCIA CARD DRIVER
M: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
L: linux-wireless@vger.kernel.org
* BSS_SECTION(0, 0, 0)
* _end = .;
*
- * /DISCARD/ : {
- * EXIT_TEXT
- * EXIT_DATA
- * EXIT_CALL
- * }
* STABS_DEBUG
* DWARF_DEBUG
+ *
+ * DISCARDS // must be the last
* }
*
* [__init_begin, __init_end] is the init section that may be freed after init
#endif
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
-#define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
+#define MCOUNT_REC() . = ALIGN(8); \
+ VMLINUX_SYMBOL(__start_mcount_loc) = .; \
*(__mcount_loc) \
VMLINUX_SYMBOL(__stop_mcount_loc) = .;
#else
/* __*init sections */ \
__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
*(.ref.rodata) \
- MCOUNT_REC() \
DEV_KEEP(init.rodata) \
DEV_KEEP(exit.rodata) \
CPU_KEEP(init.rodata) \
MEM_DISCARD(init.data) \
KERNEL_CTORS() \
*(.init.rodata) \
+ MCOUNT_REC() \
DEV_DISCARD(init.rodata) \
CPU_DISCARD(init.rodata) \
MEM_DISCARD(init.rodata)
#define INIT_RAM_FS
#endif
+ /*
+ * Default discarded sections.
+ *
+ * Some archs want to discard exit text/data at runtime rather than
+ * link time due to cross-section references such as alt instructions,
+ * bug table, eh_frame, etc. DISCARDS must be the last of output
+ * section definitions so that such archs put those in earlier section
+ * definitions.
+ */
+ #define DISCARDS \
+ /DISCARD/ : { \
+ EXIT_TEXT \
+ EXIT_DATA \
+ EXIT_CALL \
+ *(.discard) \
+ }
+
/**
* PERCPU_VADDR - define output section for percpu area
* @vaddr: explicit base address (optional)
#include "trace_output.h"
+#undef TRACE_SYSTEM
#define TRACE_SYSTEM "TRACE_SYSTEM"
DEFINE_MUTEX(event_mutex);
__common_field(unsigned char, flags);
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
- __common_field(int, tgid);
+ __common_field(int, lock_depth);
return ret;
}
ftrace_event_write(struct file *file, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
+ struct trace_parser parser;
size_t read = 0;
- int i, set = 1;
ssize_t ret;
- char *buf;
- char ch;
if (!cnt || cnt < 0)
return 0;
if (ret < 0)
return ret;
- ret = get_user(ch, ubuf++);
- if (ret)
- return ret;
- read++;
- cnt--;
-
- /* skip white space */
- while (cnt && isspace(ch)) {
- ret = get_user(ch, ubuf++);
- if (ret)
- return ret;
- read++;
- cnt--;
- }
-
- /* Only white space found? */
- if (isspace(ch)) {
- file->f_pos += read;
- ret = read;
- return ret;
- }
-
- buf = kmalloc(EVENT_BUF_SIZE+1, GFP_KERNEL);
- if (!buf)
+ if (trace_parser_get_init(&parser, EVENT_BUF_SIZE + 1))
return -ENOMEM;
- if (cnt > EVENT_BUF_SIZE)
- cnt = EVENT_BUF_SIZE;
+ read = trace_get_user(&parser, ubuf, cnt, ppos);
+
+ if (trace_parser_loaded((&parser))) {
+ int set = 1;
- i = 0;
- while (cnt && !isspace(ch)) {
- if (!i && ch == '!')
+ if (*parser.buffer == '!')
set = 0;
- else
- buf[i++] = ch;
- ret = get_user(ch, ubuf++);
+ parser.buffer[parser.idx] = 0;
+
+ ret = ftrace_set_clr_event(parser.buffer + !set, set);
if (ret)
- goto out_free;
- read++;
- cnt--;
+ goto out_put;
}
- buf[i] = 0;
-
- file->f_pos += read;
-
- ret = ftrace_set_clr_event(buf, set);
- if (ret)
- goto out_free;
ret = read;
- out_free:
- kfree(buf);
+ out_put:
+ trace_parser_put(&parser);
return ret;
}
FIELD(unsigned char, flags),
FIELD(unsigned char, preempt_count),
FIELD(int, pid),
- FIELD(int, tgid));
+ FIELD(int, lock_depth));
}
static ssize_t
}
#endif /* CONFIG_MODULES */
-struct notifier_block trace_module_nb = {
+static struct notifier_block trace_module_nb = {
.notifier_call = trace_module_notify,
.priority = 0,
};
if (!call->regfunc)
continue;
+/*
+ * Testing syscall events here is pretty useless, but
+ * we still do it if configured. But this is time consuming.
+ * What we really need is a user thread to perform the
+ * syscalls as we test.
+ */
+#ifndef CONFIG_EVENT_TRACE_TEST_SYSCALLS
+ if (call->system &&
+ strcmp(call->system, "syscalls") == 0)
+ continue;
+#endif
+
pr_info("Testing event %s: ", call->name);
/*
#ifdef CONFIG_FUNCTION_TRACER
- static DEFINE_PER_CPU(atomic_t, test_event_disable);
+ static DEFINE_PER_CPU(atomic_t, ftrace_test_event_disable);
static void
function_test_events_call(unsigned long ip, unsigned long parent_ip)
pc = preempt_count();
resched = ftrace_preempt_disable();
cpu = raw_smp_processor_id();
- disabled = atomic_inc_return(&per_cpu(test_event_disable, cpu));
+ disabled = atomic_inc_return(&per_cpu(ftrace_test_event_disable, cpu));
if (disabled != 1)
goto out;
trace_nowake_buffer_unlock_commit(buffer, event, flags, pc);
out:
- atomic_dec(&per_cpu(test_event_disable, cpu));
+ atomic_dec(&per_cpu(ftrace_test_event_disable, cpu));
ftrace_preempt_enable(resched);
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff