diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2013-01-26 02:08:14 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2013-02-15 23:59:32 -0800 |
| commit | 990a3158002ff19b2d665334bc7a21a8887a123d (patch) | |
| tree | 46f0b8155e6032cd410b0dda690f0490c4c08279 | |
| parent | 67da097e1295071da700862e7faa8a294b182b42 (diff) | |
| download | linux-990a3158002ff19b2d665334bc7a21a8887a123d.tar.bz2 | |
ixgbe: Update DESC_NEEDED define to adjust for changes to MAX_SKB_FRAGS
Recent changes have made it so that MAX_SKB_FRAGS is now never less than 16.
As a result we were seeing issues on systems with 64K pages as it would
cause DESC_NEEDED to increase to 68, and we would need over 136 descriptors
free before clean_tx_irq would wake the queue.
This patch makes it so that DESC_NEEDED is always MAX_SKB_FRAGS + 4. This
should prevent any possible deadlocks on the systems with 64K pages as we will
now only require 42 descriptors to wake.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index 196002ba031c..a8e10cff7a89 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -156,7 +156,7 @@ struct vf_macvlans { /* Tx Descriptors needed, worst case */ #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD) -#define DESC_NEEDED ((MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE)) + 4) +#define DESC_NEEDED (MAX_SKB_FRAGS + 4) /* wrapper around a pointer to a socket buffer, * so a DMA handle can be stored along with the buffer */ |