Dou Liyang
bec04037e4
genirq/core: Introduce struct irq_affinity_desc ...
The interrupt affinity management uses straight cpumask pointers to convey
the automatically assigned affinity masks for managed interrupts. The core
interrupt descriptor allocation also decides based on the pointer being non
NULL whether an interrupt is managed or not.
Devices which use managed interrupts usually have two classes of
interrupts:
- Interrupts for multiple device queues
- Interrupts for general device management
Currently both classes are treated the same way, i.e. as managed
interrupts. The general interrupts get the default affinity mask assigned
while the device queue interrupts are spread out over the possible CPUs.
Treating the general interrupts as managed is both a limitation and under
certain circumstances a bug. Assume the following situation:
default_irq_affinity = 4..7
So if CPUs 4-7 are offlined, then the core code will shut down the device
management interrupts because the last CPU in their affinity mask went
offline.
It's also a limitation because it's desired to allow manual placement of
the general device interrupts for various reasons. If they are marked
managed then the interrupt affinity setting from both user and kernel space
is disabled.
To remedy that situation it's required to convey more information than the
cpumasks through various interfaces related to interrupt descriptor
allocation.
Instead of adding yet another argument, create a new data structure
'irq_affinity_desc' which for now just contains the cpumask. This struct
can be expanded to convey auxilliary information in the next step.
No functional change, just preparatory work.
[ tglx: Simplified logic and clarified changelog ]
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Dou Liyang <douliyangs@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-pci@vger.kernel.org
Cc: kashyap.desai@broadcom.com
Cc: shivasharan.srikanteshwara@broadcom.com
Cc: sumit.saxena@broadcom.com
Cc: ming.lei@redhat.com
Cc: hch@lst.de
Cc: douliyang1@huawei.com
Link: https://lkml.kernel.org/r/20181204155122.6327-2-douliyangs@gmail.com
2018-12-19 11:32:08 +01:00
bpf, ppc64: generalize fetching subprog into bpf_jit_get_func_addr
2018-11-26 17:34:24 -08:00
for-linus-20181102
2018-11-02 11:25:48 -07:00
kvm_config: add CONFIG_VIRTIO_MENU
2018-10-24 20:55:56 -04:00
kdb: kdb_support: mark expected switch fall-throughs
2018-11-13 20:38:50 +00:00
swiotlb: Skip cache maintenance on map error
2018-11-21 18:47:58 +01:00
uprobes: Fix handle_swbp() vs. unregister() + register() race once more
2018-11-23 08:31:19 +01:00
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
genirq/core: Introduce struct irq_affinity_desc
2018-12-19 11:32:08 +01:00
Merge branch 'for-4.19/upstream' into for-linus
2018-08-20 18:33:50 +02:00
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
memblock: stop using implicit alignment to SMP_CACHE_BYTES
2018-10-31 08:54:16 -07:00
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
Merge branches 'doc.2018.08.30a', 'dynticks.2018.08.30b', 'srcu.2018.08.30b' and 'torture.2018.08.29a' into HEAD
2018-08-30 16:12:53 -07:00
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-12-01 12:35:48 -08:00
posix-cpu-timers: Remove useless call to check_dl_overrun()
2018-11-08 07:43:35 +01:00
This includes two more fixes:
2018-11-30 10:40:11 -08:00
audit: use ktime_get_coarse_real_ts64() for timestamps
2018-07-17 14:45:08 -04:00
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
\n
2018-08-17 09:41:28 -07:00
audit: fix use-after-free in audit_add_watch
2018-07-18 11:43:36 -04:00
audit: rename FILTER_TYPE to FILTER_EXCLUDE
2018-06-19 10:39:54 -04:00
audit/stable-4.18 PR 20180814
2018-08-15 10:46:54 -07:00
kbuild: fix kernel/bounds.c 'W=1' warning
2018-10-31 08:54:14 -07:00
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
x86/speculation: Rework SMT state change
2018-11-28 11:57:07 +01:00
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
delayacct: track delays from thrashing cache pages
2018-10-26 16:26:32 -07:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
signal: Pass pid type into group_send_sig_info
2018-07-21 12:57:35 -05:00
kernel/fail_function.c: remove meaningless null pointer check before debugfs_remove_recursive
2018-10-31 08:54:12 -07:00
New gcc plugin: stackleak
2018-11-01 11:46:27 -07:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
kernel: hung_task.c: disable on suspend
2018-10-25 18:45:08 +02:00
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
Merge branch 'x86/build' into locking/core, to pick up dependent patches and unify jump-label work
2018-10-16 17:30:11 +02:00
kallsyms: reduce size a little on 64-bit
2018-09-10 22:54:33 +09:00
kconfig: include kernel/Kconfig.preempt from init/Kconfig
2018-08-02 08:06:54 +09:00
kernel/kcov.c: mark funcs in __sanitizer_cov_trace_pc() as notrace
2018-11-30 14:56:14 -08:00
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kexec: Allocate decrypted control pages for kdump if SME is enabled
2018-10-06 12:01:51 +02:00
kernel/kexec_file.c: remove some duplicated includes
2018-11-03 10:09:37 -07:00
kprobes: Don't call BUG_ON() if there is a kprobe in use on free list
2018-09-12 08:01:16 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
x86/entry: Add STACKLEAK erasing the kernel stack at the end of syscalls
2018-09-04 10:35:47 -07:00
Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax
2018-10-28 11:35:40 -07:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
jump_table: Move entries into ro_after_init region
2018-09-27 17:56:49 +02:00
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
kernel/panic.c: filter out a potential trailing newline
2018-10-31 08:54:14 -07:00
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
signal: Use group_send_sig_info to kill all processes in a pid namespace
2018-09-16 16:08:25 +02:00
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS
2018-11-28 11:57:11 +01:00
kernel/reboot.c: export pm_power_off_prepare
2018-09-11 16:13:24 +01:00
kernel/relay.c: change return type to vm_fault_t
2018-06-15 07:55:24 +09:00
resource/docs: Complete kernel-doc style function documentation
2018-11-07 16:47:47 +01:00
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2018-10-24 11:49:35 +01:00
kernel/signal.c: fix a comment error
2018-10-31 08:54:14 -07:00
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-25 11:43:47 -07:00
stackleak: Disable function tracing and kprobes for stackleak_erase()
2018-11-30 09:05:07 -08:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
kernel/sys.c: remove duplicated include
2018-09-20 22:01:11 +02:00
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
kernel/sysctl.c: remove duplicated include
2018-11-03 10:09:37 -07:00
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
rcutorture: Check GP completion at stutter end
2018-08-29 09:20:48 -07:00
tracepoint: Fix tracepoint array element size mismatch
2018-10-17 15:35:29 -04:00
umh: Add command line to user mode helpers
2018-10-22 19:37:36 -07:00
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
userns: also map extents in the reverse map to kernel IDs
2018-11-07 23:51:16 -06:00
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
bec04037e4