The patch titled
ixgb: fix cache miss due to miscalculation
has been added to the -mm tree. Its filename is
ixgb-fix-cache-miss-due-to-miscalculation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ixgb: fix cache miss due to miscalculation
From: "Kok, Auke" <auke-jan.h.kok@xxxxxxxxx>
Reduce writeback threshold by 1. We were instructing the hardware to wait
until the 17th descriptor which went over the cache line limit.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
Signed-off-by: Auke Kok <auke.jan.h.kok@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/net/ixgb/ixgb_main.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff -puN drivers/net/ixgb/ixgb_main.c~ixgb-fix-cache-miss-due-to-miscalculation drivers/net/ixgb/ixgb_main.c
--- a/drivers/net/ixgb/ixgb_main.c~ixgb-fix-cache-miss-due-to-miscalculation
+++ a/drivers/net/ixgb/ixgb_main.c
@@ -140,12 +140,12 @@ module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
/* some defines for controlling descriptor fetches in h/w */
-#define RXDCTL_WTHRESH_DEFAULT 16 /* chip writes back at this many or RXT0 */
-#define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
- * this */
-#define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
- * is pushed this many descriptors
- * from head */
+#define RXDCTL_WTHRESH_DEFAULT 15 /* chip writes back at this many or RXT0 */
+#define RXDCTL_PTHRESH_DEFAULT 0 /* chip considers prefech below
+ * this */
+#define RXDCTL_HTHRESH_DEFAULT 0 /* chip will only prefetch if tail
+ * is pushed this many descriptors
+ * from head */
/**
* ixgb_init_module - Driver Registration Routine
_
Patches currently in -mm which might be from auke-jan.h.kok@xxxxxxxxx are
e100-fix-mdio-mdio-x.patch
e100-increment-version-to-3510-k4.patch
e1000-same-cosmetic-fix-as-earlier-sent-out-for-ipv4.patch
e1000-remove-0x1000-as-supported-device.patch
e1000-explicitly-power-up-the-phy-during-loopback-testing.patch
e1000-explicit-locking-for-two-ethtool-path-functions.patch
e1000-allow-nvm-to-setup-lplu-for-igp2-and-igp3.patch
e1000-force-full-dma-clocking-for-10-100-speed.patch
e1000-disable-aggressive-clocking-on-esb2-with-serdes-port.patch
e1000-increment-driver-version-to-719-k6.patch
ixgb-add-cx4-phy-type-detection-and-subdevice-id.patch
ixgb-fix-cache-miss-due-to-miscalculation.patch
ixgb-increment-version-to-10109-k4.patch
ixgb-add-pci-error-recovery-callbacks.patch
e100-disable-device-on-pci-error.patch
e1000-disable-device-on-pci-error.patch
e1000_7033_dump_ring.patch
-
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