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Commit cca195a1 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Roland Dreier
Browse files

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: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 8473c603

drivers/infiniband/hw/qib/qib_driver.c

+4 −1
Original line number Diff line number Diff line
@@ -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;