The serial_info_pool is needed if array sets serialize_policy to
true, so don't destroy it.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Before dispatch write bio, raid1 array which enables
serialize_policy need to check if overlap exists between
this bio and previous on-flying bios. If there is overlap,
then it has to wait until the collision is disappeared.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
So far, IO serialization is used for two scenarios:
1. raid1 which enables write-behind mode, and there is rdev in the array
which is multi-queue device and flaged with writemostly.
2. IO serialization is enabled or disabled by change serialize_policy.
So introduce rdev_need_serial to check the first scenario. And for 1, IO
serialization is enabled automatically while 2 is controlled manually.
And it is possible that both scenarios are true, so for create serial pool,
rdev/rdevs_init_serial should be separate from check if the pool existed or
not. Then for destroy pool, we need to check if the pool is needed by other
rdevs due to the first scenario.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
With the new sysfs node, we can use it to control if raid1 array
wants io serialization or not. So mddev_create_serial_pool and
mddev_destroy_serial_pool are called in serialize_policy_store
to enable or disable the serialization.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
1. The related resources (spin_lock, list and waitqueue) are needed for
address raid1 reorder overlap issue too, in this case, rdev is set to
NULL for mddev_create/destroy_serial_pool which implies all rdevs need
to handle these resources.
And also add "is_suspend" to mddev_destroy_serial_pool since it will
be called under suspended situation, which also makes both create and
destroy pool have same arguments.
2. Introduce rdevs_init_serial which is called if raid1 io serialization
is enabled since all rdevs need to init related stuffs.
3. rdev_init_serial and clear_bit(CollisionCheck, &rdev->flags) should
be called between suspend and resume.
No need to export mddev_create_serial_pool since it is only called in
md-mod module.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
It actually means create here, so fix the typo.
Reported-by: Song Liu <liu.song.a23@gmail.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Previously, wb_info_pool and wb_list stuffs are introduced
to address potential data inconsistence issue for write
behind device.
Now rename them to serial related name, since the same
mechanism will be used to address reorder overlap write
issue for raid1.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
We can use "cnt" directly to update conf->worker_cnt_per_group
if alloc_thread_groups returns 0.
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
There are several algorithms available for raid6 to generate xor and syndrome
parity, including basic int1, int2 ... int32 and SIMD optimized implementation
like sse and neon. To test and choose the best algorithms at the initial
stage, we need provide enough disk data to feed the algorithms. However, the
disk number we provided depends on page size and gfmul table, seeing bellow:
const int disks = (65536/PAGE_SIZE) + 2;
So when come to 64K PAGE_SIZE, there is only one data disk plus 2 parity disk,
as a result the chosed algorithm is not reliable. For example, on my arm64
machine with 64K page enabled, it will choose intx32 as the best one, although
the NEON implementation is better.
This patch tries to fix the problem by defining a constant raid6 disk number to
supporting arbitrary page size.
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Song Liu <songliubraving@fb.com>
The compilation warning is redefination showed as following:
In file included from tables.c:2:
../../../include/linux/export.h:180: warning: "EXPORT_SYMBOL" redefined
#define EXPORT_SYMBOL(sym) __EXPORT_SYMBOL(sym, "")
In file included from tables.c:1:
../../../include/linux/raid/pq.h:61: note: this is the location of the previous definition
#define EXPORT_SYMBOL(sym)
Fixes: 69a94abb82 ("export.h, genksyms: do not make genksyms calculate CRC of trimmed symbols")
Signed-off-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Song Liu <songliubraving@fb.com>
The compilation error is redeclaration showed as following:
In file included from ../../../include/linux/limits.h:6,
from /usr/include/x86_64-linux-gnu/bits/local_lim.h:38,
from /usr/include/x86_64-linux-gnu/bits/posix1_lim.h:161,
from /usr/include/limits.h:183,
from /usr/lib/gcc/x86_64-linux-gnu/8/include-fixed/limits.h:194,
from /usr/lib/gcc/x86_64-linux-gnu/8/include-fixed/syslimits.h:7,
from /usr/lib/gcc/x86_64-linux-gnu/8/include-fixed/limits.h:34,
from ../../../include/linux/raid/pq.h:30,
from algos.c:14:
../../../include/linux/types.h:114:15: error: conflicting types for ‘int64_t’
typedef s64 int64_t;
^~~~~~~
In file included from /usr/include/stdint.h:34,
from /usr/lib/gcc/x86_64-linux-gnu/8/include/stdint.h:9,
from /usr/include/inttypes.h:27,
from ../../../include/linux/raid/pq.h:29,
from algos.c:14:
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h:27:19: note: previous \
declaration of ‘int64_t’ was here
typedef __int64_t int64_t;
Fixes: 54d50897d5 ("linux/kernel.h: split *_MAX and *_MIN macros into <linux/limits.h>")
Signed-off-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Song Liu <songliubraving@fb.com>
In md_bitmap_unplug, bitmap->storage.filemap is double checked.
In md_bitmap_daemon_work, bitmap->storage.filemap should be checked
before reference.
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Some PCI bridges implement BARs in addition to bridge windows. For
example, here's a PLX switch:
04:00.0 PCI bridge: PLX Technology, Inc. PEX 8724 24-Lane, 6-Port PCI
Express Gen 3 (8 GT/s) Switch, 19 x 19mm FCBGA (rev ca)
(prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 30, NUMA node 0
Memory at 90a00000 (32-bit, non-prefetchable) [size=256K]
Bus: primary=04, secondary=05, subordinate=0a, sec-latency=0
I/O behind bridge: 00002000-00003fff
Memory behind bridge: 90000000-909fffff
Prefetchable memory behind bridge: 0000380000800000-0000380000bfffff
Previously, when the kernel assigned resource addresses (with the
pci=realloc command line parameter, for example) it could clear the struct
resource corresponding to the BAR. When this happened, lspci would report
this BAR as "ignored":
Region 0: Memory at <ignored> (32-bit, non-prefetchable) [size=256K]
This is because the kernel reports a zero start address and zero flags
in the corresponding sysfs resource file and in /proc/bus/pci/devices.
Investigation with 'lspci -x', however, shows the BIOS-assigned address
will still be programmed in the device's BAR registers.
It's clearly a bug that the kernel lost track of the BAR value, but in most
cases, this still won't result in a visible issue because nothing uses the
memory, so nothing is affected. However, when an IOMMU is in use, it will
not reserve this space in the IOVA because the kernel no longer thinks the
range is valid. (See dmar_init_reserved_ranges() for the Intel
implementation of this.)
Without the proper reserved range, a DMA mapping may allocate an IOVA that
matches a bridge BAR, which results in DMA accesses going to the BAR
instead of the intended RAM.
The problem was in pci_assign_unassigned_root_bus_resources(). When any
resource from a bridge device fails to get assigned, the code set the
resource's flags to zero. This makes sense for bridge windows, as they
will be re-enabled later, but for regular BARs, it makes the kernel
permanently lose track of the fact that they decode address space.
Change pci_assign_unassigned_root_bus_resources() and
pci_assign_unassigned_bridge_resources() so they only clear "res->flags"
for bridge *windows*, not bridge BARs.
Fixes: da7822e5ad ("PCI: update bridge resources to get more big ranges when allocating space (again)")
Link: https://lore.kernel.org/r/20200108213208.4612-1-logang@deltatee.com
[bhelgaas: commit log, check for pci_is_bridge()]
Reported-by: Kit Chow <kchow@gigaio.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
I missed the fact that these constants was not yet available, so hard
code their values in the dts to make the branch compile on its own.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fix attribute name from "jtag_enable", which described twice to
"cpld3_version", which is expected to be instead of second appearance
of "jtag_enable".
Fixes: 2752e34442 ("Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add support for new Mellanox system types of basic class VMOD0010,
containing new Mellanox systems equipped with new switch device
Spectrum 3 (32x400GbE/64x200G/128x100G Ethernet switch).
These are the Top of the Rack 1U/2U/4U systems, equipped with
Mellanox Comex card and with the switch board with Mellanox Spectrum-3
device.
This class of devices can be equipped with two PS units for 1U/2U or
with four PS units for 4U systems.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add support for capability register, which is used for detection of the
actual number of interrupt capable components within the particular
group, supported by the specific system.
Such components could be for example the number of power units and
interrupts related to these units.
The motivation is to avoid adding a new code in the future in order to
distinct between the systems type supported different number of the
components like power supplies, FANs, ASICs, line cards.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add support for capability register, which contains information about
the number of PS units equipped on the system and about minimum I2C
frequency supported by the all system's I2C devices.
Utilization of this register allows to avoid necessity of providing new
system description, in case it differs in number of PS units or in
minimal I2C frequency.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add support for new Mellanox system types of basic class VMOD0009,
containing Mellanox systems equipped with the switch devices
Spectrum 1 (32x100GbE Ethernet switch) and Switch-IB/Switch-IB2
(36x100Gbe InfiniBand switch).
These are the Top of the Rack system, equipped with Mellanox Comex
card.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Separate assignment for systems mux configuration based on system type,
instead of setting the same configuration for the all.
The motivation is to allow introduction of new systems types with the
different mux topology.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add documentation for the new attributes for:
- Exposing reset causes types asserted by: platform reset, SoC reset,
AC power failure, software power off request.
- Setting and removing system VPD (EEPROM) hardware write protection.
- Voltage regulator devices configuration update status and firmware
version.
- Setting PCIe ASIC reset to disable or enable state during PCIe root
complex reset.
- System static topology identification, like system's static I2C
topology, number and type of FPGA devices within the system and so on.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add new attributes for "next-generation" type systems:
- Reset cause indication, when system reset has been caused by the
platform reset request through CPLD, by AC power failure,
by software power off request through CPLD. by signal asserted by SOC
through ACPI register. It introduces more reset causes, which can
be monitored after the reboots.
- Setting and removing system VPD (EEPROM) hardware write protection.
It allows to access VPD during production cycle and prevents VPD
corruption on system in field.
- Voltage regulator devices configuration update status and version. It
allows to monitor configuration update status and current active
version for such sort of devices.
- PCIe ASIC reset disable - when set ASIC will go down upon PCIe
root complex reset, otherwise ASIC will stay up during PCIe root
complex reset.
- System configuration Ids to provide system static topology
identification, like system's static I2C topology, number and type of
FPGA devices within the system and so on.
Add the existing attribute for "iio" bank selection for system type
"msn21xx".
All the above attributes are exposed through "sysfs" by "mlxreg-io"
driver.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Remove blank lines between "What" and "Date" keywords.
Start each section with "What" keyword.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fix attribute name from "jtag_enable", which described twice to
"cpld3_version", which is expected to be instead of second appearance
of "jtag_enable".
Fixes: 2752e34442 ("Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Remove redundant semicolons at the end of few functions.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Add an entry for drivers/platform/x86/intel-uncore-frequency.c.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Some server users set limits on the uncore frequency using MSR 620H, while
running latency sensitive workloads. Here uncore frequency controls
RING/LLC(last-level cache) clocks.
But MSR control is not always possible from the user space, so this driver
provides a sysfs interface to set max and min frequency limits. This MSR
620H is a die scoped in multi-die system or package scoped in non multi-die
systems.
When this driver is loaded, a new directory is created under
/sys/devices/system/cpu.
For example on a two package Skylake server:
$cd /sys/devices/system/cpu/intel_uncore_frequency
$ls
package_00_die_00 package_01_die_00
$ls package_00_die_00
max_freq_khz min_freq_khz initial_max_freq_khz
initial_min_freq_khz
$grep . *
max_freq_khz:2400000
min_freq_khz:1200000
initial_max_freq_khz:2400000
initial_min_freq_khz:1200000
Here, initial_max_freq_khz and initial_min_freq_khz are read only
attributes to show power up or initial values of max and min frequencies
respectively. Other attributes are read-write, so that users can modify.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Unlike its PCI counterpart, tc_match_device() was never used outside
the TURBOchannel bus code.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Maciej W . Rozycki <macro@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Unlike its PCI counterpart, gio_match_device() was never used outside
the GIO bus code.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Change the dependency for KVM_INTEL, i.e. KVM w/ VMX, from Intel CPUs to
any CPU that supports the IA32_FEAT_CTL MSR and thus VMX functionality.
This effectively allows building KVM_INTEL for Centaur and Zhaoxin CPUs.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-20-sean.j.christopherson@intel.com
Provide stubs for perf_guest_get_msrs() and intel_pt_handle_vmx() when
building without support for Intel CPUs, i.e. CPU_SUP_INTEL=n. Lack of
stubs is not currently a problem as the only user, KVM_INTEL, takes a
dependency on CPU_SUP_INTEL=y. Provide the stubs for all CPUs so that
KVM_INTEL can be built for any CPU with compatible hardware support,
e.g. Centuar and Zhaoxin CPUs.
Note, the existing stub for perf_guest_get_msrs() is essentially dead
code as KVM selects CONFIG_PERF_EVENTS, i.e. the only user guarantees
the full implementation is built.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-19-sean.j.christopherson@intel.com
Define the VMCS execution control flags (consumed by KVM) using their
associated VMX_FEATURE_* to provide a strong hint that new VMX features
are expected to be added to VMX_FEATURE and considered for reporting via
/proc/cpuinfo.
No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-18-sean.j.christopherson@intel.com
Explicitly check the current CPU's IA32_FEAT_CTL and VMX feature flags
when verifying compatibility across physical CPUs. This effectively
adds a check on IA32_FEAT_CTL to ensure that VMX is fully enabled on
all CPUs.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-17-sean.j.christopherson@intel.com
An earlier commit (1b789577f6,
"netfilter: arp_tables: init netns pointer in xt_tgchk_param struct")
fixed missing net initialization for arptables, but turns out it was
incomplete. We can get a very similar struct net NULL deref during
error unwinding:
general protection fault: 0000 [#1] PREEMPT SMP KASAN
RIP: 0010:xt_rateest_put+0xa1/0x440 net/netfilter/xt_RATEEST.c:77
xt_rateest_tg_destroy+0x72/0xa0 net/netfilter/xt_RATEEST.c:175
cleanup_entry net/ipv4/netfilter/arp_tables.c:509 [inline]
translate_table+0x11f4/0x1d80 net/ipv4/netfilter/arp_tables.c:587
do_replace net/ipv4/netfilter/arp_tables.c:981 [inline]
do_arpt_set_ctl+0x317/0x650 net/ipv4/netfilter/arp_tables.c:1461
Also init the netns pointer in xt_tgdtor_param struct.
Fixes: add6746124 ("netfilter: add struct net * to target parameters")
Reported-by: syzbot+91bdd8eece0f6629ec8b@syzkaller.appspotmail.com
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Add below function-tracer filter options to boot-time tracing.
- ftrace.[instance.INSTANCE.]ftrace.filters
This will take an array of tracing function filter rules
- ftrace.[instance.INSTANCE.]ftrace.notraces
This will take an array of NON-tracing function filter rules
Link: http://lkml.kernel.org/r/157867244841.17873.10933616628243103561.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add ftrace.cpumask option support to boot-time tracing.
This sets cpumask for each instance.
- ftrace.[instance.INSTANCE.]cpumask = CPUMASK;
Set the trace cpumask. Note that the CPUMASK should be a string
which <tracefs>/tracing_cpumask can accepts.
Link: http://lkml.kernel.org/r/157867243625.17873.13613922641273149372.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add instance node support to boot-time tracing. User can set
some options and event nodes under instance node.
- ftrace.instance.INSTANCE[...]
Add new INSTANCE instance. Some options and event nodes
are acceptable for instance node.
Link: http://lkml.kernel.org/r/157867242413.17873.9814204526141500278.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add synthetic event node support to boot time tracing.
The synthetic event is a kind of event node, but the group
name is "synthetic".
- ftrace.event.synthetic.EVENT.fields = FIELD[, FIELD2...]
Defines new synthetic event with FIELDs. Each field should be
"type varname".
The synthetic node requires "fields" string arraies, which defines
the fields as same as tracing/synth_events interface.
Link: http://lkml.kernel.org/r/157867241236.17873.12411615143321557709.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add kprobe event support on event node to boot-time tracing.
If the group name of event is "kprobes", the boot-time tracing
defines new probe event according to "probes" values.
- ftrace.event.kprobes.EVENT.probes = PROBE[, PROBE2...]
Defines new kprobe event based on PROBEs. It is able to define
multiple probes on one event, but those must have same type of
arguments.
For example,
ftrace.events.kprobes.myevent {
probes = "vfs_read $arg1 $arg2";
enable;
}
This will add kprobes:myevent on vfs_read with the 1st and the 2nd
arguments.
Link: http://lkml.kernel.org/r/157867240104.17873.9712052065426433111.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add per-event settings for boottime tracing. User can set filter,
actions and enable on each event on boot. The event entries are
under ftrace.event.GROUP.EVENT node (note that the option key
includes event's group name and event name.) This supports below
configs.
- ftrace.event.GROUP.EVENT.enable
Enables GROUP:EVENT tracing.
- ftrace.event.GROUP.EVENT.filter = FILTER
Set FILTER rule to the GROUP:EVENT.
- ftrace.event.GROUP.EVENT.actions = ACTION[, ACTION2...]
Set ACTIONs to the GROUP:EVENT.
For example,
ftrace.event.sched.sched_process_exec {
filter = "pid < 128"
enable
}
this will enable tracing "sched:sched_process_exec" event
with "pid < 128" filter.
Link: http://lkml.kernel.org/r/157867238942.17873.11177628789184546198.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Setup tracing options via extra boot config in addition to kernel
command line.
This adds following commands support. These are applied to
the global trace instance.
- ftrace.options = OPT1[,OPT2...]
Enable given ftrace options.
- ftrace.trace_clock = CLOCK
Set given CLOCK to ftrace's trace_clock.
- ftrace.buffer_size = SIZE
Configure ftrace buffer size to SIZE. You can use "KB" or "MB"
for that SIZE.
- ftrace.events = EVENT[, EVENT2...]
Enable given events on boot. You can use a wild card in EVENT.
- ftrace.tracer = TRACER
Set TRACER to current tracer on boot. (e.g. function)
Note that this is NOT replacing the kernel parameters, because
this boot config based setting is later than that. If you want to
trace earlier boot events, you still need kernel parameters.
Link: http://lkml.kernel.org/r/157867237723.17873.17494943526320587488.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Make the synthetic event accepts a different type field to record.
However, the size and signed flag must be same.
Link: http://lkml.kernel.org/r/157867235358.17873.61732996461602171.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Register kprobe event to dynevent in subsys_initcall level.
This will allow kernel to register new kprobe events in
fs_initcall level via trace_run_command.
Link: http://lkml.kernel.org/r/157867234213.17873.18039000024374948737.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Since kprobe-events use event_trigger_unlock_commit_regs() directly,
that events doesn't show up in printk buffer if "tp_printk" is set.
Use trace_event_buffer_commit() in kprobe events so that it can
invoke output_printk() as same as other trace events.
Link: http://lkml.kernel.org/r/157867233085.17873.5210928676787339604.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
[ Adjusted data var declaration placement in __kretprobe_trace_func() ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Apply soft-disabled and the filter rule of the trace events to
the printk output of tracepoints (a.k.a. tp_printk kernel parameter)
as same as trace buffer output.
Link: http://lkml.kernel.org/r/157867231876.17873.15825819592284704068.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Add a documentation for extended boot config under
admin-guide, since it is including the syntax of boot config.
Link: http://lkml.kernel.org/r/157867230658.17873.9309879174829924324.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
