Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 294409d2 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

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: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 50566ac8

drivers/hv/channel.c

+12 −2
Original line number Diff line number Diff line
@@ -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 */

	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));

					       get_order(send_ringbuffer_size +

					       recv_ringbuffer_size));

	else

		out = (void *)page_address(page);



	if (!out) {

		err = -ENOMEM;