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authorDon Fry <pcnet32@verizon.net>2007-03-05 18:13:09 -0800
committerJeff Garzik <jeff@garzik.org>2007-03-06 06:14:54 -0500
commitb2cbbd8e0e8093fbf115ac2669482b016d781c78 (patch)
tree04d96724cf39fb65e7209da608fcda0f22d14666 /arch/powerpc/sysdev
parent4c44fd009ae79fc04e2c049f708792ad83400dde (diff)
pcnet32: Fix PCnet32 performance bug on non-coherent architecutres
The PCnet32 driver always passed the the size of the largest possible packet to the pci_dma_sync_single_for_cpu and pci_dma_sync_single_for_device. This results in a fairly large "colateral damage" in the caches and makes the flush operation itself much slower. On a system with a 40MHz CPU this patch increases network bandwidth by about 12%. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Don Fry <pcnet32@verizon.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'arch/powerpc/sysdev')
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