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| author | K. Y. Srinivasan <kys@microsoft.com> | 2012-12-01 06:46:36 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-17 10:46:39 -0800 |
| commit | 98fa8cf4bcc79cb14de8fd815bbcd00dcbd7b20e (patch) | |
| tree | 0d48abd179e49709cdac7e28eb853a653df7fbe2 /drivers/hv/channel.c | |
| parent | f878f3d59ed26f489add852ed6d5c8e5f3bbb1aa (diff) | |
| download | blackbird-op-linux-98fa8cf4bcc79cb14de8fd815bbcd00dcbd7b20e.tar.gz blackbird-op-linux-98fa8cf4bcc79cb14de8fd815bbcd00dcbd7b20e.zip | |
Drivers: hv: Optimize the signaling on the write path
The host has already implemented the "read" side optimizations.
Leverage that to optimize "write" side signaling.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/channel.c')
| -rw-r--r-- | drivers/hv/channel.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 773a2f25a8f0..727c5f1d6acf 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -564,6 +564,7 @@ int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, struct scatterlist bufferlist[3]; u64 aligned_data = 0; int ret; + bool signal = false; /* Setup the descriptor */ @@ -580,9 +581,9 @@ int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, sg_set_buf(&bufferlist[2], &aligned_data, packetlen_aligned - packetlen); - ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); + ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); - if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound)) + if (ret == 0 && signal) vmbus_setevent(channel); return ret; @@ -606,6 +607,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, u32 packetlen_aligned; struct scatterlist bufferlist[3]; u64 aligned_data = 0; + bool signal = false; if (pagecount > MAX_PAGE_BUFFER_COUNT) return -EINVAL; @@ -641,9 +643,9 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, sg_set_buf(&bufferlist[2], &aligned_data, packetlen_aligned - packetlen); - ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); + ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); - if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound)) + if (ret == 0 && signal) vmbus_setevent(channel); return ret; @@ -665,6 +667,7 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, u32 packetlen_aligned; struct scatterlist bufferlist[3]; u64 aligned_data = 0; + bool signal = false; u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, multi_pagebuffer->len); @@ -703,9 +706,9 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, sg_set_buf(&bufferlist[2], &aligned_data, packetlen_aligned - packetlen); - ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); + ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); - if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound)) + if (ret == 0 && signal) vmbus_setevent(channel); return ret; |
