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authorMike Marciniszyn <mike.marciniszyn@intel.com>2012-05-02 11:21:53 -0400
committerRoland Dreier <roland@purestorage.com>2012-05-14 12:36:18 -0700
commitcca195a168ac062967fd1fa75c75546167b1e213 (patch)
treef0d5c473d9306e9c6d1c1761d16bb1f72dfbf0ce /drivers/infiniband
parent8473c60314f5a225019a25bcd13763d42d988827 (diff)
downloadtalos-op-linux-cca195a168ac062967fd1fa75c75546167b1e213.tar.gz
talos-op-linux-cca195a168ac062967fd1fa75c75546167b1e213.zip
IB/qib: Add prefetch for eager buffers
Add a prefetch call when a packet has been stored. The nature of the prefetch is correctly determined by the alternatives mechanism. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/qib/qib_driver.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/qib/qib_driver.c b/drivers/infiniband/hw/qib/qib_driver.c
index 6fc9365ba8a6..8895cfec5019 100644
--- a/drivers/infiniband/hw/qib/qib_driver.c
+++ b/drivers/infiniband/hw/qib/qib_driver.c
@@ -38,6 +38,7 @@
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
+#include <linux/prefetch.h>
#include "qib.h"
@@ -481,8 +482,10 @@ u32 qib_kreceive(struct qib_ctxtdata *rcd, u32 *llic, u32 *npkts)
etail = qib_hdrget_index(rhf_addr);
updegr = 1;
if (tlen > sizeof(*hdr) ||
- etype >= RCVHQ_RCV_TYPE_NON_KD)
+ etype >= RCVHQ_RCV_TYPE_NON_KD) {
ebuf = qib_get_egrbuf(rcd, etail);
+ prefetch_range(ebuf, tlen - sizeof(*hdr));
+ }
}
if (!eflags) {
u16 lrh_len = be16_to_cpu(hdr->lrh[2]) << 2;
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