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36ec807b |
| 20-Sep-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.12 merge window.
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Revision tags: v6.11, v6.11-rc7, v6.11-rc6, v6.11-rc5, v6.11-rc4, v6.11-rc3, v6.11-rc2, v6.11-rc1 |
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3daee2e4 |
| 16-Jul-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.10' into next
Sync up with mainline to bring in device_for_each_child_node_scoped() and other newer APIs.
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af9c191a |
| 22-Sep-2024 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'trace-ring-buffer-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ring-buffer updates from Steven Rostedt:
- tracing/ring-buffer: persistent buffer across
Merge tag 'trace-ring-buffer-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull ring-buffer updates from Steven Rostedt:
- tracing/ring-buffer: persistent buffer across reboots
This allows for the tracing instance ring buffer to stay persistent across reboots. The way this is done is by adding to the kernel command line:
trace_instance=boot_map@0x285400000:12M
This will reserve 12 megabytes at the address 0x285400000, and then map the tracing instance "boot_map" ring buffer to that memory. This will appear as a normal instance in the tracefs system:
/sys/kernel/tracing/instances/boot_map
A user could enable tracing in that instance, and on reboot or kernel crash, if the memory is not wiped by the firmware, it will recreate the trace in that instance. For example, if one was debugging a shutdown of a kernel reboot:
# cd /sys/kernel/tracing # echo function > instances/boot_map/current_tracer # reboot [..] # cd /sys/kernel/tracing # tail instances/boot_map/trace swapper/0-1 [000] d..1. 164.549800: restore_boot_irq_mode <-native_machine_shutdown swapper/0-1 [000] d..1. 164.549801: native_restore_boot_irq_mode <-native_machine_shutdown swapper/0-1 [000] d..1. 164.549802: disconnect_bsp_APIC <-native_machine_shutdown swapper/0-1 [000] d..1. 164.549811: hpet_disable <-native_machine_shutdown swapper/0-1 [000] d..1. 164.549812: iommu_shutdown_noop <-native_machine_restart swapper/0-1 [000] d..1. 164.549813: native_machine_emergency_restart <-__do_sys_reboot swapper/0-1 [000] d..1. 164.549813: tboot_shutdown <-native_machine_emergency_restart swapper/0-1 [000] d..1. 164.549820: acpi_reboot <-native_machine_emergency_restart swapper/0-1 [000] d..1. 164.549821: acpi_reset <-acpi_reboot swapper/0-1 [000] d..1. 164.549822: acpi_os_write_port <-acpi_reboot
On reboot, the buffer is examined to make sure it is valid. The validation check even steps through every event to make sure the meta data of the event is correct. If any test fails, it will simply reset the buffer, and the buffer will be empty on boot.
- Allow the tracing persistent boot buffer to use the "reserve_mem" option
Instead of having the admin find a physical address to store the persistent buffer, which can be very tedious if they have to administrate several different machines, allow them to use the "reserve_mem" option that will find a location for them. It is not as reliable because of KASLR, as the loading of the kernel in different locations can cause the memory allocated to be inconsistent. Booting with "nokaslr" can make reserve_mem more reliable.
- Have function graph tracer handle offsets from a previous boot.
The ring buffer output from a previous boot may have different addresses due to kaslr. Have the function graph tracer handle these by using the delta from the previous boot to the new boot address space.
- Only reset the saved meta offset when the buffer is started or reset
In the persistent memory meta data, it holds the previous address space information, so that it can calculate the delta to have function tracing work. But this gets updated after being read to hold the new address space. But if the buffer isn't used for that boot, on reboot, the delta is now calculated from the previous boot and not the boot that holds the data in the ring buffer. This causes the functions not to be shown. Do not save the address space information of the current kernel until it is being recorded.
- Add a magic variable to test the valid meta data
Add a magic variable in the meta data that can also be used for validation. The validator of the previous buffer doesn't need this magic data, but it can be used if the meta data is changed by a new kernel, which may have the same format that passes the validator but is used differently. This magic number can also be used as a "versioning" of the meta data.
- Align user space mapped ring buffer sub buffers to improve TLB entries
Linus mentioned that the mapped ring buffer sub buffers were misaligned between the meta page and the sub-buffers, so that if the sub-buffers were bigger than PAGE_SIZE, it wouldn't allow the TLB to use bigger entries.
- Add new kernel command line "traceoff" to disable tracing on boot for instances
If tracing is enabled for a boot instance, there needs a way to be able to disable it on boot so that new events do not get entered into the ring buffer and be mixed with events from a previous boot, as that can be confusing.
- Allow trace_printk() to go to other instances
Currently, trace_printk() can only go to the top level instance. When debugging with a persistent buffer, it is really useful to be able to add trace_printk() to go to that buffer, so that you have access to them after a crash.
- Do not use "bin_printk()" for traces to a boot instance
The bin_printk() saves only a pointer to the printk format in the ring buffer, as the reader of the buffer can still have access to it. But this is not the case if the buffer is from a previous boot. If the trace_printk() is going to a "persistent" buffer, it will use the slower version that writes the printk format into the buffer.
- Add command line option to allow trace_printk() to go to an instance
Allow the kernel command line to define which instance the trace_printk() goes to, instead of forcing the admin to set it for every boot via the tracefs options.
- Start a document that explains how to use tracefs to debug the kernel
- Add some more kernel selftests to test user mapped ring buffer
* tag 'trace-ring-buffer-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (28 commits) selftests/ring-buffer: Handle meta-page bigger than the system selftests/ring-buffer: Verify the entire meta-page padding tracing/Documentation: Start a document on how to debug with tracing tracing: Add option to set an instance to be the trace_printk destination tracing: Have trace_printk not use binary prints if boot buffer tracing: Allow trace_printk() to go to other instance buffers tracing: Add "traceoff" flag to boot time tracing instances ring-buffer: Align meta-page to sub-buffers for improved TLB usage ring-buffer: Add magic and struct size to boot up meta data ring-buffer: Don't reset persistent ring-buffer meta saved addresses tracing/fgraph: Have fgraph handle previous boot function addresses tracing: Allow boot instances to use reserve_mem boot memory tracing: Fix ifdef of snapshots to not prevent last_boot_info file ring-buffer: Use vma_pages() helper function tracing: Fix NULL vs IS_ERR() check in enable_instances() tracing: Add last boot delta offset for stack traces tracing: Update function tracing output for previous boot buffer tracing: Handle old buffer mappings for event strings and functions tracing/ring-buffer: Add last_boot_info file to boot instance ring-buffer: Save text and data locations in mapped meta data ...
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#
ef2bd81d |
| 23-Aug-2024 |
Steven Rostedt <rostedt@goodmis.org> |
tracing: Add option to set an instance to be the trace_printk destination
Add a option "trace_printk_dest" that will make the tracing instance the location that trace_printk() will go to. This is us
tracing: Add option to set an instance to be the trace_printk destination
Add a option "trace_printk_dest" that will make the tracing instance the location that trace_printk() will go to. This is useful if the trace_printk or one of the top level tracers is too noisy and there's a need to separate the two. Then an instance can be created, the trace_printk can be set to go there instead, where it will not be lost in the noise of the top level tracer.
Note, only one instance can be the destination of trace_printk at a time. If an instance sets this flag, the instance that had it set will have it cleared. There is always one instance that has this set. By default, that is the top instance. This flag cannot be cleared from the top instance. Doing so will result in an -EINVAL. The only way this flag can be cleared from the top instance is by another instance setting it.
Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Vincent Donnefort <vdonnefort@google.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vineeth Pillai <vineeth@bitbyteword.org> Cc: Beau Belgrave <beaub@linux.microsoft.com> Cc: Alexander Graf <graf@amazon.com> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: David Howells <dhowells@redhat.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Ross Zwisler <zwisler@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Alexander Aring <aahringo@redhat.com> Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com> Cc: Tomas Glozar <tglozar@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "Jonathan Corbet" <corbet@lwn.net> Link: https://lore.kernel.org/20240823014019.545459018@goodmis.org Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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#
a23e1966 |
| 15-Jul-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.11 merge window.
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Revision tags: v6.10, v6.10-rc7, v6.10-rc6, v6.10-rc5, v6.10-rc4, v6.10-rc3, v6.10-rc2 |
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6f47c7ae |
| 28-May-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.9' into next
Sync up with the mainline to bring in the new cleanup API.
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#
afeea275 |
| 04-Jul-2024 |
Maxime Ripard <mripard@kernel.org> |
Merge drm-misc-next-2024-07-04 into drm-misc-next-fixes
Let's start the drm-misc-next-fixes cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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d754ed28 |
| 19-Jun-2024 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to v6.10-rc3.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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89aa02ed |
| 12-Jun-2024 |
Rodrigo Vivi <rodrigo.vivi@intel.com> |
Merge drm/drm-next into drm-xe-next
Needed to get tracing cleanup and add mmio tracing series.
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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92815da4 |
| 12-Jun-2024 |
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> |
Merge remote-tracking branch 'drm-misc/drm-misc-next' into HEAD
Merge drm-misc-next tree into the msm-next tree in order to be able to use HDMI connector framework for the MSM HDMI driver.
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375c4d15 |
| 27-May-2024 |
Maxime Ripard <mripard@kernel.org> |
Merge drm/drm-next into drm-misc-next
Let's start the new release cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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Revision tags: v6.10-rc1 |
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60a2f25d |
| 16-May-2024 |
Tvrtko Ursulin <tursulin@ursulin.net> |
Merge drm/drm-next into drm-intel-gt-next
Some display refactoring patches are needed in order to allow conflict- less merging.
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
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0c8ea05e |
| 04-Jul-2024 |
Peter Zijlstra <peterz@infradead.org> |
Merge branch 'tip/x86/cpu'
The Lunarlake patches rely on the new VFM stuff.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
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594ce0b8 |
| 10-Jun-2024 |
Russell King (Oracle) <rmk+kernel@armlinux.org.uk> |
Merge topic branches 'clkdev' and 'fixes' into for-linus
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f73a058b |
| 28-May-2024 |
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> |
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
v6.10-rc1 is released, forward from v6.9
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
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621cde16 |
| 15-May-2024 |
Jakub Kicinski <kuba@kernel.org> |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Cross merge.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Revision tags: v6.9, v6.9-rc7, v6.9-rc6, v6.9-rc5, v6.9-rc4, v6.9-rc3, v6.9-rc2, v6.9-rc1, v6.8, v6.8-rc7 |
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06d07429 |
| 29-Feb-2024 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to get the drm_printer changes to drm-intel-next.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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8815da98 |
| 13-May-2024 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'docs-6.10' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "Another not-too-busy cycle for documentation, including:
- Some build-system changes to detect
Merge tag 'docs-6.10' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "Another not-too-busy cycle for documentation, including:
- Some build-system changes to detect the variable fonts installed by some distributions that can break the PDF build.
- Various updates and additions to the Spanish, Chinese, Italian, and Japanese translations.
- Update the stable-kernel rules to match modern practice
... and the usual array of corrections, updates, and typo fixes"
* tag 'docs-6.10' of git://git.lwn.net/linux: (42 commits) cgroup: Add documentation for missing zswap memory.stat kernel-doc: Added "*" in $type_constants2 to fix 'make htmldocs' warning. docs:core-api: fixed typos and grammar in printk-index page Documentation: tracing: Fix spelling mistakes docs/zh_CN/rust: Update the translation of quick-start to 6.9-rc4 docs/zh_CN/rust: Update the translation of general-information to 6.9-rc4 docs/zh_CN/rust: Update the translation of coding-guidelines to 6.9-rc4 docs/zh_CN/rust: Update the translation of arch-support to 6.9-rc4 docs: stable-kernel-rules: fix typo sent->send docs/zh_CN: remove two inconsistent spaces docs: scripts/check-variable-fonts.sh: Improve commands for detection docs: stable-kernel-rules: create special tag to flag 'no backporting' docs: stable-kernel-rules: explain use of stable@kernel.org (w/o @vger.) docs: stable-kernel-rules: remove code-labels tags and a indention level docs: stable-kernel-rules: call mainline by its name and change example docs: stable-kernel-rules: reduce redundancy docs, kprobes: Add riscv as supported architecture Docs: typos/spelling docs: kernel_include.py: Cope with docutils 0.21 docs: ja_JP/howto: Catch up update in v6.8 ...
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dd29dfe7 |
| 02-May-2024 |
Saurav Shah <sauravshah.31@gmail.com> |
Documentation: tracing: Fix spelling mistakes
Fix spelling mistakes in the documentation.
Signed-off-by: Saurav Shah <sauravshah.31@gmail.com> Link: https://lore.kernel.org/r/20240501233659.25441-1
Documentation: tracing: Fix spelling mistakes
Fix spelling mistakes in the documentation.
Signed-off-by: Saurav Shah <sauravshah.31@gmail.com> Link: https://lore.kernel.org/r/20240501233659.25441-1-sauravshah.31@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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2e21dee6 |
| 13-Mar-2024 |
Jiri Kosina <jkosina@suse.com> |
Merge branch 'for-6.9/amd-sfh' into for-linus
- assorted fixes and optimizations for amd-sfh (Basavaraj Natikar)
Signed-off-by: Jiri Kosina <jkosina@suse.com>
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Revision tags: v6.8-rc6, v6.8-rc5 |
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41c177cf |
| 11-Feb-2024 |
Rob Clark <robdclark@chromium.org> |
Merge tag 'drm-misc-next-2024-02-08' into msm-next
Merge the drm-misc tree to uprev MSM CI.
Signed-off-by: Rob Clark <robdclark@chromium.org>
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Revision tags: v6.8-rc4, v6.8-rc3 |
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4db102dc |
| 29-Jan-2024 |
Maxime Ripard <mripard@kernel.org> |
Merge drm/drm-next into drm-misc-next
Kickstart 6.9 development cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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Revision tags: v6.8-rc2 |
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be3382ec |
| 23-Jan-2024 |
Lucas De Marchi <lucas.demarchi@intel.com> |
Merge drm/drm-next into drm-xe-next
Sync to v6.8-rc1.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
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03c11eb3 |
| 14-Feb-2024 |
Ingo Molnar <mingo@kernel.org> |
Merge tag 'v6.8-rc4' into x86/percpu, to resolve conflicts and refresh the branch
Conflicts: arch/x86/include/asm/percpu.h arch/x86/include/asm/text-patching.h
Signed-off-by: Ingo Molnar <mingo@k
Merge tag 'v6.8-rc4' into x86/percpu, to resolve conflicts and refresh the branch
Conflicts: arch/x86/include/asm/percpu.h arch/x86/include/asm/text-patching.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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42ac0be1 |
| 26-Jan-2024 |
Ingo Molnar <mingo@kernel.org> |
Merge branch 'linus' into x86/mm, to refresh the branch and pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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