forked from luck/tmp_suning_uos_patched
860f242eb5
This patch provides a sysfs interface to change some properties of the ibmveth buffer pools (size of the buffers, number of buffers per pool, and whether a pool is active). Ethernet drivers use ethtool to provide this type of functionality. However, the buffers in the ibmveth driver can have an arbitrary size (not only regular, mini, and jumbo which are the only sizes that ethtool can change), and also ibmveth can have an arbitrary number of buffer pools Under heavy load we have seen dropped packets which obviously kills TCP performance. We have created several fixes that mitigate this issue, but we definitely need a way of changing the number of buffers for an adapter dynamically. Also, changing the size of the buffers allows users to change the MTU to something big (bigger than a jumbo frame) greatly improving performance on partition to partition transfers. The patch creates directories pool1...pool4 in the device directory in sysfs, each with files: num, size, and active (which default to the values in the mainline version). Comments and suggestions are welcome... -- Santiago A. Leon Power Linux Development IBM Linux Technology Center Signed-off-by: Jeff Garzik <jeff@garzik.org> |
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| Kconfig | ||
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