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| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2012-05-02 11:21:53 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-05-14 12:36:18 -0700 |
| commit | cca195a168ac062967fd1fa75c75546167b1e213 (patch) | |
| tree | f0d5c473d9306e9c6d1c1761d16bb1f72dfbf0ce /drivers/infiniband | |
| parent | 8473c60314f5a225019a25bcd13763d42d988827 (diff) | |
| download | talos-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.c | 5 |
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; |
