Zhipeng Xie 56637084e8 perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled ... [ Upstream commit 60490e7966 ] This problem can be reproduced with CONFIG_PERF_USE_VMALLOC enabled on both x86_64 and aarch64 arch when using sysdig -B(using ebpf)[1]. sysdig -B works fine after rebuilding the kernel with CONFIG_PERF_USE_VMALLOC disabled. I tracked it down to the if condition event->rb->nr_pages != nr_pages in perf_mmap is true when CONFIG_PERF_USE_VMALLOC is enabled where event->rb->nr_pages = 1 and nr_pages = 2048 resulting perf_mmap to return -EINVAL. This is because when CONFIG_PERF_USE_VMALLOC is enabled, rb->nr_pages is always equal to 1. Arch with CONFIG_PERF_USE_VMALLOC enabled by default: arc/arm/csky/mips/sh/sparc/xtensa Arch with CONFIG_PERF_USE_VMALLOC disabled by default: x86_64/aarch64/... Fix this problem by using data_page_nr() [1] https://github.com/draios/sysdig Fixes: 906010b213 ("perf_event: Provide vmalloc() based mmap() backing") Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220209145417.6495-1-xiezhipeng1@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-27 14:38:58 +02:00
..
bpf	bpf: Adjust BPF stack helper functions to accommodate skip > 0	2022-04-08 14:24:14 +02:00
cgroup	cgroup-v1: Correct privileges check in release_agent writes	2022-03-02 11:47:47 +01:00
configs
debug	kdb: Fix the putarea helper function	2022-04-08 14:23:51 +02:00
dma	dma-mapping: remove bogus test for pfn_valid from dma_map_resource	2022-04-27 14:38:50 +02:00
entry
events	perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled	2022-04-27 14:38:58 +02:00
gcov
irq	genirq/affinity: Consider that CPUs on nodes can be unbalanced	2022-04-20 09:34:20 +02:00
kcsan
livepatch	livepatch: Fix build failure on 32 bits processors	2022-04-08 14:23:29 +02:00
locking	locking/lockdep: Iterate lock_classes directly when reading lockdep files	2022-04-08 14:23:57 +02:00
power	PM: suspend: fix return value of __setup handler	2022-04-08 14:23:07 +02:00
printk	printk: fix return value of printk.devkmsg __setup handler	2022-04-08 14:23:19 +02:00
rcu	rcu: Mark writes to the rcu_segcblist structure's ->flags field	2022-04-08 14:23:55 +02:00
sched	sched/pelt: Fix attach_entity_load_avg() corner case	2022-04-27 14:38:58 +02:00
time	timers: Fix warning condition in __run_timers()	2022-04-20 09:34:21 +02:00
trace	tracing: Have type enum modifications copy the strings	2022-04-08 14:24:13 +02:00
.gitignore
acct.c
async.c	Revert "module, async: async_synchronize_full() on module init iff async is used"	2022-02-23 12:03:07 +01:00
audit_fsnotify.c
audit_tree.c
audit_watch.c
audit.c
audit.h	audit: log AUDIT_TIME_* records only from rules	2022-04-08 14:23:06 +02:00
auditfilter.c
auditsc.c	audit: log AUDIT_TIME_* records only from rules	2022-04-08 14:23:06 +02:00
backtracetest.c
bounds.c
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	cpu/hotplug: Remove the 'cpu' member of cpuhp_cpu_state	2022-04-20 09:34:21 +02:00
crash_core.c
crash_dump.c
cred.c	ucounts: Base set_cred_ucounts changes on the real user	2022-02-23 12:03:20 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c
extable.c
fail_function.c
fork.c	sched: Fix yet more sched_fork() races	2022-03-08 19:12:49 +01:00
freezer.c
futex.c
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kexec.c
kheaders.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
Makefile	static_call: Don't make __static_call_return0 static	2022-04-13 20:59:28 +02:00
module_signature.c
module_signing.c
module-internal.h
module.c	Revert "module, async: async_synchronize_full() on module init iff async is used"	2022-02-23 12:03:07 +01:00
notifier.c
nsproxy.c
padata.c
panic.c
params.c
pid_namespace.c
pid.c
profile.c
ptrace.c	ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE	2022-04-08 14:22:50 +02:00
range.c
reboot.c
regset.c
relay.c
resource_kunit.c
resource.c	kernel/resource: fix kfree() of bootmem memory again	2022-04-08 14:23:43 +02:00
rseq.c	rseq: Remove broken uapi field layout on 32-bit little endian	2022-04-08 14:23:10 +02:00
scftorture.c
scs.c
seccomp.c	seccomp: Invalidate seccomp mode to catch death failures	2022-02-16 12:56:38 +01:00
signal.c	signal: In get_signal test for signal_group_exit every time through the loop	2022-03-08 19:12:34 +01:00
smp.c	smp: Fix offline cpu check in flush_smp_call_function_queue()	2022-04-20 09:34:21 +02:00
smpboot.c
smpboot.h
softirq.c
stackleak.c	gcc-plugins/stackleak: Use noinstr in favor of notrace	2022-02-23 12:03:07 +01:00
stacktrace.c	stacktrace: move filter_irq_stacks() to kernel/stacktrace.c	2022-04-13 20:59:28 +02:00
static_call_inline.c	static_call: Don't make __static_call_return0 static	2022-04-13 20:59:28 +02:00
static_call.c	static_call: Don't make __static_call_return0 static	2022-04-13 20:59:28 +02:00
stop_machine.c
sys_ni.c
sys.c	ucounts: Move RLIMIT_NPROC handling after set_user	2022-02-23 12:03:20 +01:00
sysctl-test.c
sysctl.c	x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting	2022-03-11 12:22:31 +01:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c	ucounts: Handle wrapping in is_ucounts_overlimit	2022-02-23 12:03:20 +01:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c	ucounts: Fix systemd LimitNPROC with private users regression	2022-03-08 19:12:42 +01:00
user-return-notifier.c
user.c
usermode_driver.c
utsname_sysctl.c
utsname.c
watch_queue.c	watch_queue: Free the page array when watch_queue is dismantled	2022-04-08 14:24:11 +02:00
watchdog_hld.c
watchdog.c
workqueue_internal.h
workqueue.c