netdev.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alexander Duyck <alexander.h.duyck@redhat.com>
To: netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
	jeffrey.t.kirsher@intel.com
Subject: [PATCH] fm10k: Don't assume page fragments are page size
Date: Tue, 16 Jun 2015 11:47:12 -0700	[thread overview]
Message-ID: <20150616184712.1966.44790.stgit@ahduyck-vm-fedora22> (raw)

This change pulls out the optimization that assumed that all fragments
would be limited to page size.  That hasn't been the case for some time now
and to assume this is incorrect as the TCP allocator can provide up to a
32K page fragment.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_main.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 982fdcdc795b..620ff5e9dc59 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -1079,9 +1079,7 @@ netdev_tx_t fm10k_xmit_frame_ring(struct sk_buff *skb,
 	struct fm10k_tx_buffer *first;
 	int tso;
 	u32 tx_flags = 0;
-#if PAGE_SIZE > FM10K_MAX_DATA_PER_TXD
 	unsigned short f;
-#endif
 	u16 count = TXD_USE_COUNT(skb_headlen(skb));
 
 	/* need: 1 descriptor per page * PAGE_SIZE/FM10K_MAX_DATA_PER_TXD,
@@ -1089,12 +1087,9 @@ netdev_tx_t fm10k_xmit_frame_ring(struct sk_buff *skb,
 	 *       + 2 desc gap to keep tail from touching head
 	 * otherwise try next time
 	 */
-#if PAGE_SIZE > FM10K_MAX_DATA_PER_TXD
 	for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
 		count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
-#else
-	count += skb_shinfo(skb)->nr_frags;
-#endif
+
 	if (fm10k_maybe_stop_tx(tx_ring, count + 3)) {
 		tx_ring->tx_stats.tx_busy++;
 		return NETDEV_TX_BUSY;

             reply	other threads:[~2015-06-16 18:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-16 18:47 Alexander Duyck [this message]
2015-06-16 21:38 ` [Intel-wired-lan] [PATCH] fm10k: Don't assume page fragments are page size Keller, Jacob E
2015-09-02  2:00 ` Singh, Krishneil K

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150616184712.1966.44790.stgit@ahduyck-vm-fedora22 \
    --to=alexander.h.duyck@redhat.com \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=jeffrey.t.kirsher@intel.com \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).