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authorStefan Roscher <ossrosch@linux.vnet.ibm.com>2008-10-22 15:54:38 -0700
committerRoland Dreier <rolandd@cisco.com>2008-10-22 15:54:38 -0700
commit263c24a2bbbaca75805ed231e8346d86410af9d0 (patch)
treea4de046c1f94f381d1ab241b4a719a25ea58ec66 /MAINTAINERS
parent19f4282149147b4a3e8c670373dc73ddd5d5facc (diff)
IB/ehca: Reject dynamic memory add/remove when ehca adapter is present
Since the ehca device driver does not support dynamic memory add and remove operations, the driver must explicitly reject such requests in order to prevent unpredictable behaviors related to existing memory regions that cover all of memory being used by InfiniBand protocols in the kernel. The solution (for now at least) is to add a memory notifier to the ehca device driver and if a request for dynamic memory add or remove comes in, ehca will always reject it. The user can add or remove memory by hot-removing the ehca adapter, performing the memory operation, and then hot-adding the ehca adapter back. Signed-off-by: Stefan Roscher <stefan.roscher@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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