mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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278d1ed65e
Impact: cleanup Currently we have NR_CPUS, which is 1 on UP, and CONFIG_NR_CPUS on SMP. If we make CONFIG_NR_CPUS always valid (and always 1 on !SMP), we can skip the middleman. This also allows us to find and check all the unaudited NR_CPUS usage as we prepare for v. large NR_CPUS. To avoid breaking every arch, we cheat and do this for the moment in the header if the arch doesn't. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
37 lines
938 B
C
37 lines
938 B
C
#ifndef _LINUX_THREADS_H
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#define _LINUX_THREADS_H
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/*
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* The default limit for the nr of threads is now in
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* /proc/sys/kernel/threads-max.
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*/
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/*
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* Maximum supported processors. Setting this smaller saves quite a
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* bit of memory. Use nr_cpu_ids instead of this except for static bitmaps.
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*/
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#ifndef CONFIG_NR_CPUS
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/* FIXME: This should be fixed in the arch's Kconfig */
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#define CONFIG_NR_CPUS 1
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#endif
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/* Places which use this should consider cpumask_var_t. */
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#define NR_CPUS CONFIG_NR_CPUS
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#define MIN_THREADS_LEFT_FOR_ROOT 4
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/*
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* This controls the default maximum pid allocated to a process
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*/
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#define PID_MAX_DEFAULT (CONFIG_BASE_SMALL ? 0x1000 : 0x8000)
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/*
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* A maximum of 4 million PIDs should be enough for a while.
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* [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.]
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*/
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#define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \
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(sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT))
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#endif
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