From: K. Y. Srinivasan Date: Mon, 1 Jun 2015 04:27:03 +0000 (-0700) Subject: Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=294409d20572e9bcf857328286433f851168d54a;p=linux-beck.git Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion Allocate ring buffer memory from the NUMA node assigned to the channel. Since this is a performance and not a correctness issue, if the node specific allocation were to fail, fall back and allocate without specifying the node. Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 7a1c2db1826b..603ce97e9027 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -73,6 +73,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, unsigned long flags; int ret, err = 0; unsigned long t; + struct page *page; spin_lock_irqsave(&newchannel->lock, flags); if (newchannel->state == CHANNEL_OPEN_STATE) { @@ -87,8 +88,17 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, newchannel->channel_callback_context = context; /* Allocate the ring buffer */ - out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, - get_order(send_ringbuffer_size + recv_ringbuffer_size)); + page = alloc_pages_node(cpu_to_node(newchannel->target_cpu), + GFP_KERNEL|__GFP_ZERO, + get_order(send_ringbuffer_size + + recv_ringbuffer_size)); + + if (!page) + out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, + get_order(send_ringbuffer_size + + recv_ringbuffer_size)); + else + out = (void *)page_address(page); if (!out) { err = -ENOMEM;