Adhemerval Zanella cda99af14e linux: Simplify get_nprocs ... This patch simplifies the memory allocation code and uses the sched routines instead of reimplement it. This still uses a stack allocation buffer, so it can be used on malloc initialization code. Linux currently supports at maximum of 4096 cpus for most architectures: $ find -iname Kconfig | xargs git grep -A10 -w NR_CPUS | grep -w range arch/alpha/Kconfig- range 2 32 arch/arc/Kconfig- range 2 4096 arch/arm/Kconfig- range 2 16 if DEBUG_KMAP_LOCAL arch/arm/Kconfig- range 2 32 if !DEBUG_KMAP_LOCAL arch/arm64/Kconfig- range 2 4096 arch/csky/Kconfig- range 2 32 arch/hexagon/Kconfig- range 2 6 if SMP arch/ia64/Kconfig- range 2 4096 arch/mips/Kconfig- range 2 256 arch/openrisc/Kconfig- range 2 32 arch/parisc/Kconfig- range 2 32 arch/riscv/Kconfig- range 2 32 arch/s390/Kconfig- range 2 512 arch/sh/Kconfig- range 2 32 arch/sparc/Kconfig- range 2 32 if SPARC32 arch/sparc/Kconfig- range 2 4096 if SPARC64 arch/um/Kconfig- range 1 1 arch/x86/Kconfig-# [NR_CPUS_RANGE_BEGIN ... NR_CPUS_RANGE_END] range. arch/x86/Kconfig- range NR_CPUS_RANGE_BEGIN NR_CPUS_RANGE_END arch/xtensa/Kconfig- range 2 32 With x86 supporting 8192: arch/x86/Kconfig 976 config NR_CPUS_RANGE_END 977 int 978 depends on X86_64 979 default 8192 if SMP && CPUMASK_OFFSTACK 980 default 512 if SMP && !CPUMASK_OFFSTACK 981 default 1 if !SMP So using a maximum of 32k cpu should cover all cases (and I would expect once we start to have many more CPUs that Linux would provide a more straightforward way to query for such information). A test is added to check if sched_getaffinity can successfully return with large buffers. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit 33099d72e4)		2021-10-01 18:19:10 +02:00
..
aarch64	glibc.malloc.check: Wean away from malloc hooks	2021-07-22 18:38:08 +05:30
alpha
arc	ARC: elf: make type safe	2021-07-21 13:13:45 -07:00
arm	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
csky
generic	mtrace: Wean away from malloc hooks	2021-07-22 18:38:06 +05:30
gnu	hurd: Fix glob lstat compatibility	2021-07-22 20:31:52 +02:00
hppa
htl	htl: Do not expose pthread hidden proto outside libpthread	2021-07-18 20:25:33 +00:00
hurd
i386	i386: Regenerate ulps	2021-07-25 22:29:27 +02:00
ia64	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
ieee754	Update math: redirect roundeven function	2021-06-27 07:56:57 -07:00
m68k
mach	misc: Add __get_nprocs_sched	2021-10-01 18:19:09 +02:00
microblaze
mips	Update MIPS libm-test-ulps	2021-07-07 15:50:18 +00:00
nios2
nptl	nptl: Fix type of pthread_mutexattr_getrobust_np, pthread_mutexattr_setrobust_np (bug 28036)	2021-09-21 07:15:25 +02:00
posix	gaiconf_init: Avoid double-free in label and precedence lists	2021-08-04 15:53:46 +05:30
powerpc	Force building with -fno-common	2021-07-09 20:09:14 +02:00
pthread	nptl: pthread_kill must send signals to a specific thread [BZ #28407]	2021-10-01 18:18:15 +02:00
riscv	RISC-V: Update rv64 ULPs	2021-07-21 08:44:09 +02:00
s390	s390: Fix MEMCHR_Z900_G5 ifunc-variant if n>=0x80000000 [BZ #28024]	2021-07-01 16:46:59 +02:00
sh
sparc	nptl: Remove remaining code from libpthread	2021-05-21 22:35:01 +02:00
unix	linux: Simplify get_nprocs	2021-10-01 18:19:10 +02:00
wordsize-32
wordsize-64
x86	x86-64: Add Avoid_Short_Distance_REP_MOVSB	2021-07-28 13:23:57 -07:00
x86_64	x86-64: Use testl to check __x86_string_control	2021-08-31 08:09:25 -07:00