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| author |   Nadia Derbey <Nadia.Derbey@bull.net> | 2008-04-29 01:00:42 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:12 -0700 |
| commit | b6b337ad1c1d6fe11b09b35d75464b84b3e11f07 (patch) | |
| tree | df174a23a827cc43db76900d1ddbbef3ac9ddc90 /include/linux/memory.h | |
| parent | ipc: define the slab_memory_callback priority as a constant (diff) | |
| download | linux-dev-b6b337ad1c1d6fe11b09b35d75464b84b3e11f07.tar.xz linux-dev-b6b337ad1c1d6fe11b09b35d75464b84b3e11f07.zip | |
ipc: recompute msgmni on memory add / remove
Introduce the registration of a callback routine that recomputes msg_ctlmni
upon memory add / remove.
A single notifier block is registered in the hotplug memory chain for all the
ipc namespaces.
Since the ipc namespaces are not linked together, they have their own
notification chain: one notifier_block is defined per ipc namespace.
Each time an ipc namespace is created (removed) it registers (unregisters) its
notifier block in (from) the ipcns chain. The callback routine registered in
the memory chain invokes the ipcns notifier chain with the IPCNS_LOWMEM event.
Each callback routine registered in the ipcns namespace, in turn, recomputes
msgmni for the owning namespace.
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>
Diffstat (limited to 'include/linux/memory.h')
| -rw-r--r-- | include/linux/memory.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/memory.h b/include/linux/memory.h index 39628dfe4a4c..2f5f8a5ef2a0 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -58,6 +58,7 @@ struct mem_section; * order in the callback chain) */ #define SLAB_CALLBACK_PRI 1 +#define IPC_CALLBACK_PRI 10 #ifndef CONFIG_MEMORY_HOTPLUG_SPARSE static inline int memory_dev_init(void) |