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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 <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2015-05-31 21:27:03 -07:00 committed by Greg Kroah-Hartman
parent 50566ac870
commit 294409d205
1 changed files with 12 additions and 2 deletions
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14
drivers/hv/channel.c
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@ -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;