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Dongli Zhang bcd5148043 genirq/cpuhotplug: Retry with cpu_online_mask when migration fails 
commit 88d724e230 upstream.

When a CPU goes offline, the interrupts affine to that CPU are
re-configured.

Managed interrupts undergo either migration to other CPUs or shutdown if
all CPUs listed in the affinity are offline. The migration of managed
interrupts is guaranteed on x86 because there are interrupt vectors
reserved.

Regular interrupts are migrated to a still online CPU in the affinity mask
or if there is no online CPU to any online CPU.

This works as long as the still online CPUs in the affinity mask have
interrupt vectors available, but in case that none of those CPUs has a
vector available the migration fails and the device interrupt becomes
stale.

This is not any different from the case where the affinity mask does not
contain any online CPU, but there is no fallback operation for this.

Instead of giving up, retry the migration attempt with the online CPU mask
if the interrupt is not managed, as managed interrupts cannot be affected
by this problem.

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240423073413.79625-1-dongli.zhang@oracle.com
Cc: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-08-19 06:04:24 +02:00
arch LoongArch: Define __ARCH_WANT_NEW_STAT in unistd.h 2024-08-19 06:04:22 +02:00
block block: fix deadlock between sd_remove & sd_release 2024-08-03 08:54:24 +02:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:49:04 +02:00
Documentation smb3: fix setting SecurityFlags when encryption is required 2024-08-14 13:58:59 +02:00
drivers nvme/pci: Add APST quirk for Lenovo N60z laptop 2024-08-19 06:04:24 +02:00
fs nfsd: make svc_stat per-network namespace instead of global 2024-08-19 06:04:24 +02:00
include sunrpc: remove ->pg_stats from svc_program 2024-08-19 06:04:23 +02:00
init rust: SHADOW_CALL_STACK is incompatible with Rust 2024-08-11 12:47:24 +02:00
io_uring io_uring: fix io_match_task must_hold 2024-08-03 08:54:41 +02:00
ipc sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:47:13 +02:00
kernel genirq/cpuhotplug: Retry with cpu_online_mask when migration fails 2024-08-19 06:04:24 +02:00
lib lib/build_OID_registry: don't mention the full path of the script in output 2024-08-03 08:54:32 +02:00
LICENSES
mm mm: gup: stop abusing try_grab_folio 2024-08-19 06:04:24 +02:00
net sunrpc: use the struct net as the svc proc private 2024-08-19 06:04:23 +02:00
rust rust: kernel: require Send for Module implementations 2024-05-17 12:01:56 +02:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-23 09:24:47 +01:00
scripts kbuild: avoid build error when single DTB is turned into composite DTB 2024-08-03 08:54:36 +02:00
security apparmor: Fix null pointer deref when receiving skb during sock creation 2024-08-03 08:54:38 +02:00
sound ASoC: topology: Fix route memory corruption 2024-08-19 06:04:22 +02:00
tools Revert "selftests: mptcp: simult flows: mark 'unbalanced' tests as flaky" 2024-08-14 13:59:04 +02:00
usr
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:49:11 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: rpm-pkg: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap 20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues 2023-10-24 09:52:16 -10:00
.rustfmt.toml
COPYING
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild
Kconfig
MAINTAINERS pwm: Rename pwm_apply_state() to pwm_apply_might_sleep() 2024-06-12 11:12:24 +02:00
Makefile Linux 6.6.46 2024-08-14 13:59:04 +02:00
README

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 Restructured Text 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.