Revision 00c10bc13cdb58447d6bb2a003afad7bd60f5a5f authored by Eric W. Biederman on 31 May 2012, 23:26:40 UTC, committed by Linus Torvalds on 01 June 2012, 00:49:32 UTC
Force SIGCHLD handling to SIG_IGN so that signals are not generated and so that the children autoreap. This increases the parallelize and in general the speed of network namespace shutdown. Note self reaping childrean can exist past zap_pid_ns_processess but they will all be reaped before we allow the pid namespace init task with pid == 1 to be reaped. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Louis Rilling <louis.rilling@kerlabs.com> Cc: Mike Galbraith <efault@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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t4-l2-pi-deboost.tst
#
# rt-mutex test
#
# Op: C(ommand)/T(est)/W(ait)
# | opcode
# | | threadid: 0-7
# | | | opcode argument
# | | | |
# C: lock: 0: 0
#
# Commands
#
# opcode opcode argument
# schedother nice value
# schedfifo priority
# lock lock nr (0-7)
# locknowait lock nr (0-7)
# lockint lock nr (0-7)
# lockintnowait lock nr (0-7)
# lockcont lock nr (0-7)
# unlock lock nr (0-7)
# signal thread to signal (0-7)
# reset 0
# resetevent 0
#
# Tests / Wait
#
# opcode opcode argument
#
# prioeq priority
# priolt priority
# priogt priority
# nprioeq normal priority
# npriolt normal priority
# npriogt normal priority
# locked lock nr (0-7)
# blocked lock nr (0-7)
# blockedwake lock nr (0-7)
# unlocked lock nr (0-7)
# opcodeeq command opcode or number
# opcodelt number
# opcodegt number
# eventeq number
# eventgt number
# eventlt number
#
# 4 threads 2 lock PI
#
C: resetevent: 0: 0
W: opcodeeq: 0: 0
# Set schedulers
C: schedother: 0: 0
C: schedother: 1: 0
C: schedfifo: 2: 82
C: schedfifo: 3: 83
# T0 lock L0
C: locknowait: 0: 0
W: locked: 0: 0
# T1 lock L1
C: locknowait: 1: 1
W: locked: 1: 1
# T3 lock L0
C: lockintnowait: 3: 0
W: blocked: 3: 0
T: prioeq: 0: 83
# T0 lock L1
C: lock: 0: 1
W: blocked: 0: 1
T: prioeq: 1: 83
# T1 unlock L1
C: unlock: 1: 1
# Wait until T0 is in the wakeup code
W: blockedwake: 0: 1
# Verify that T1 is unboosted
W: unlocked: 1: 1
T: priolt: 1: 1
# T2 lock L1 (T0 is boosted and pending owner !)
C: locknowait: 2: 1
W: blocked: 2: 1
T: prioeq: 0: 83
# Interrupt T3 and wait until T3 returned
C: signal: 3: 0
W: unlocked: 3: 0
# Verify prio of T0 (still pending owner,
# but T2 is enqueued due to the previous boost by T3
T: prioeq: 0: 82
# Let T0 continue
C: lockcont: 0: 1
W: locked: 0: 1
# Unlock L1 and let T2 get L1
C: unlock: 0: 1
W: locked: 2: 1
# Verify that T0 is unboosted
W: unlocked: 0: 1
T: priolt: 0: 1
# Unlock everything and exit
C: unlock: 2: 1
W: unlocked: 2: 1
C: unlock: 0: 0
W: unlocked: 0: 0
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