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Oleg Nesterov 73b9ebfe12 [PATCH] pidhash: don't count idle threads ... fork_idle() does unhash_process() just after copy_process(). Contrary, boot_cpu's idle thread explicitely registers itself for each pid_type with nr = 0. copy_process() already checks p->pid != 0 before process_counts++, I think we can just skip attach_pid() calls and job control inits for idle threads and kill unhash_process(). We don't need to cleanup ->proc_dentry in fork_idle() because with this patch idle threads are never hashed in kernel/pid.c:pid_hash[]. We don't need to hash pid == 0 in pidmap_init(). free_pidmap() is never called with pid == 0 arg, so it will never be reused. So it is still possible to use pid == 0 in any PIDTYPE_xxx namespace from kernel/pid.c's POV. However with this patch we don't hash pid == 0 for PIDTYPE_PID case. We still have have PIDTYPE_PGID/PIDTYPE_SID entries with pid == 0: /sbin/init and kernel threads which don't call daemonize(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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drivers	…
include	…
kernel	[PATCH] pidhash: don't count idle threads	19 years ago
os-Linux	…
scripts	[PATCH] uml: arch/um/scripts/Makefile.rules - remove duplicated code	19 years ago
sys-i386	…
sys-ia64	Linux-2.6.12-rc2	20 years ago
sys-ppc	…
sys-x86_64	[PATCH] uml: fix segfault on signal delivery	19 years ago
Kconfig	…
Kconfig.char	…
Kconfig.debug	…
Kconfig.i386	…
Kconfig.net	…
Kconfig.scsi	…
Kconfig.x86_64	[PATCH] um: fix undefined reference to hweight32	19 years ago
Makefile	…
Makefile-i386	…
Makefile-ia64	…
Makefile-os-Linux	Linux-2.6.12-rc2	20 years ago
Makefile-ppc	…
Makefile-skas	…
Makefile-tt	…
Makefile-x86_64	…
config.release	…
defconfig	…