Re: [PATCH net-next] net: hns: optimize XGE capability by reducing cpu usage

On Mon, 2015-12-07 at 16:58 +0800, Yankejian (Hackim Yim) wrote:

On 2015/12/7 11:32, Joe Perches wrote:

quoted

On Sun, 2015-12-06 at 22:29 -0500, David Miller wrote:

quoted

quoted

From: yankejian <redacted>
Date: Sat, 5 Dec 2015 15:32:29 +0800

quoted

quoted

+#if (PAGE_SIZE < 8192)
+     if (hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048) {
+             truesize = hnae_buf_size(ring);
+     } else {
+             truesize = ALIGN(size, L1_CACHE_BYTES);
+             last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
+     }
+
+#else
+             truesize = ALIGN(size, L1_CACHE_BYTES);
+             last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
+#endif

This is not indented properly, and it looks terrible.

And it makes one curious as to why last_offset isn't set
in the first block.

Hi Joe,

Hello.

if hnae_buf_size que equal to HNS_BUFFER_SIZE, last_offset is useless in the routines of this function.
so it is ignored in the first block. thanks for your suggestion.

More to the point, last_offset is initialized to 0.

It'd be clearer not to initialize it at all and
set it to 0 in the first block and not overwrite
the initialization in each subsequent block.