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| author | Robert Jennings | 2008-07-23 20:34:52 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2008-07-25 07:44:44 +0200 |
| commit | 1096d63d8e7d226630706e15648705d0187787e4 (patch) | |
| tree | 0233951b529ee7b537d527e6d57c8e5d80d48ae7 /mm/pdflush.c | |
| parent | ibmveth: Automatically enable larger rx buffer pools for larger mtu (diff) | |
| download | kernel-qcow2-linux-1096d63d8e7d226630706e15648705d0187787e4.tar.gz kernel-qcow2-linux-1096d63d8e7d226630706e15648705d0187787e4.tar.xz kernel-qcow2-linux-1096d63d8e7d226630706e15648705d0187787e4.zip | |
ibmveth: enable driver for CMO
Enable ibmveth for Cooperative Memory Overcommitment (CMO). For this driver
it means calculating a desired amount of IO memory based on the current MTU
and updating this value with the bus when MTU changes occur. Because DMA
mappings can fail, we have added a bounce buffer for temporary cases where
the driver can not map IO memory for the buffer pool.
The following changes are made to enable the driver for CMO:
* DMA mapping errors will not result in error messages if entitlement has
been exceeded and resources were not available.
* DMA mapping errors are handled gracefully, ibmveth_replenish_buffer_pool()
is corrected to check the return from dma_map_single and fail gracefully.
* The driver will have a get_desired_dma function defined to function
in a CMO environment.
* When the MTU is changed, the driver will update the device IO entitlement
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Santiago Leon <santil@us.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'mm/pdflush.c')
0 files changed, 0 insertions, 0 deletions