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916b93f4e8
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Jinjie Ruan 916b93f4e8 arm64: smp: Fix missing IPI statistics 
commit 83cfac95c0 ("genirq: Allow interrupts to be excluded from
/proc/interrupts") is to avoid IPIs appear twice in /proc/interrupts.
But the commit 331a1b3a83 ("arm64: smp: Add arch support for backtrace
using pseudo-NMI") and commit 2f5cd0c7ffde("arm64: kgdb: Implement
kgdb_roundup_cpus() to enable pseudo-NMI roundup") set CPU_BACKTRACE and
KGDB_ROUNDUP IPIs "IRQ_HIDDEN" flag but not show them in
arch_show_interrupts(), which cause the interrupt kstat_irqs accounting
is missing in display.

Before this patch, CPU_BACKTRACE and KGDB_ROUNDUP IPIs are missing:
	/ # cat /proc/interrupts
	           CPU0       CPU1       CPU2       CPU3
	 11:        466        600        309        332     GICv3  27 Level     arch_timer
	 13:         24          0          0          0     GICv3  33 Level     uart-pl011
	 15:         64          0          0          0     GICv3  78 Edge      virtio0
	 16:          0          0          0          0     GICv3  79 Edge      virtio1
	 17:          0          0          0          0     GICv3  34 Level     rtc-pl031
	 18:          3          3          3          3     GICv3  23 Level     arm-pmu
	 19:          0          0          0          0 9030000.pl061   3 Edge      GPIO Key Poweroff
	IPI0:         7         14          9         26       Rescheduling interrupts
	IPI1:       354         93        233        255       Function call interrupts
	IPI2:         0          0          0          0       CPU stop interrupts
	IPI3:         0          0          0          0       CPU stop (for crash dump) interrupts
	IPI4:         0          0          0          0       Timer broadcast interrupts
	IPI5:         1          0          0          0       IRQ work interrupts
	Err:          0

After this pacth, CPU_BACKTRACE and KGDB_ROUNDUP IPIs are displayed:
	/ # cat /proc/interrupts
	           CPU0       CPU1       CPU2       CPU3
	 11:        393        281        532        449     GICv3  27 Level     arch_timer
	 13:         15          0          0          0     GICv3  33 Level     uart-pl011
	 15:         64          0          0          0     GICv3  78 Edge      virtio0
	 16:          0          0          0          0     GICv3  79 Edge      virtio1
	 17:          0          0          0          0     GICv3  34 Level     rtc-pl031
	 18:          2          2          2          2     GICv3  23 Level     arm-pmu
	 19:          0          0          0          0 9030000.pl061   3 Edge      GPIO Key Poweroff
	IPI0:        11         19          4         23       Rescheduling interrupts
	IPI1:       279        347        222         72       Function call interrupts
	IPI2:         0          0          0          0       CPU stop interrupts
	IPI3:         0          0          0          0       CPU stop (for crash dump) interrupts
	IPI4:         0          0          0          0       Timer broadcast interrupts
	IPI5:         1          0          0          1       IRQ work interrupts
	IPI6:         0          0          0          0       CPU backtrace interrupts
	IPI7:         0          0          0          0       KGDB roundup interrupts
	Err:          0

Fixes: 331a1b3a83 ("arm64: smp: Add arch support for backtrace using pseudo-NMI")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Doug Anderson <dianders@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20240620063600.573559-1-ruanjinjie@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2024-07-08 18:05:23 +01:00
arch arm64: smp: Fix missing IPI statistics 2024-07-08 18:05:23 +01:00
block blk-throttle: Fix incorrect display of io.max 2024-05-30 19:44:29 -06:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto This push fixes a bug in the new ecc P521 code as well as a buggy 2024-05-20 08:47:54 -07:00
Documentation for-linus-2024060801 2024-06-08 10:48:11 -07:00
drivers - Convert PCI core error codes to proper error numbers since latter get 2024-06-09 08:49:13 -07:00
fs Two small smb3 client fixes 2024-06-08 19:07:18 -07:00
include for-linus-2024060801 2024-06-08 10:48:11 -07:00
init Driver core changes for 6.10-rc1 2024-05-22 12:13:40 -07:00
io_uring io_uring: fix possible deadlock in io_register_iowq_max_workers() 2024-06-04 07:39:17 -06:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel Fix race between perf_event_free_task() and perf_event_release_kernel() 2024-06-08 09:26:59 -07:00
lib Including fixes from BPF and big collection of fixes for WiFi core 2024-06-06 09:55:27 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm: fix xyz_noprof functions calling profiled functions 2024-06-05 19:19:26 -07:00
net nfsd-6.10 fixes: 2024-06-07 15:07:57 -07:00
rust LoongArch changes for v6.10 2024-05-22 09:43:07 -07:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts Kbuild fixes for v6.10 (second) 2024-06-08 10:12:33 -07:00
security tomoyo: update project links 2024-06-03 22:43:11 +09:00
sound ALSA: seq: ump: Fix swapped song position pointer data 2024-05-31 09:51:44 +02:00
tools perf tools fixes for v6.10: 2nd batch 2024-06-09 09:04:51 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap mailmap: update entry for Kees Cook 2024-05-31 08:58:36 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Drop Gustavo Pimentel as PCI DWC Maintainer 2024-03-27 13:41:02 -05:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Including fixes from BPF and big collection of fixes for WiFi core 2024-06-06 09:55:27 -07:00
Makefile Linux 6.10-rc3 2024-06-09 14:19:43 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.