ipc: re-enable msgmni automatic recomputing msgmni if set to negative

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The enhancement as asked for by Yasunori: if msgmni is set to a negative
value, register it back into the ipcns notifier chain.

A new interface has been added to the notification mechanism:
notifier_chain_cond_register() registers a notifier block only if not already
registered.  With that new interface we avoid taking care of the states
changes in procfs.

Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Mingming Cao <cmm@us.ibm.com>
Cc: Pierre Peiffer <pierre.peiffer@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Nadia Derbey 2008-04-29 01:00:45 -07:00 • committed by Linus Torvalds

parent 91cfb2b4b5

commit 6546bc4279

5 changed files with 87 additions and 10 deletions

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1

include/linux/ipc_namespace.h

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4

include/linux/notifier.h

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