![]() Of kernel subsystems that work with pids the tty layer is probably the largest consumer. But it has the nice virtue that the assiation with a session only lasts until the session leader exits. Which means that no reference counting is required. So using struct pid winds up being a simple optimization to avoid hash table lookups. In the long term the use of pid_nr also ensures that when we have multiple pid spaces mixed everything will work correctly. Signed-off-by: Eric W. Biederman <eric@maxwell.lnxi.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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drivers | ||
include | ||
kernel | ||
os-Linux | ||
scripts | ||
sys-i386 | ||
sys-ia64 | ||
sys-ppc | ||
sys-x86_64 | ||
Kconfig | ||
Kconfig.char | ||
Kconfig.debug | ||
Kconfig.i386 | ||
Kconfig.net | ||
Kconfig.scsi | ||
Kconfig.x86_64 | ||
Makefile | ||
Makefile-i386 | ||
Makefile-ia64 | ||
Makefile-os-Linux | ||
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config.release | ||
defconfig |