linux-kernel - [PATCH 13/13] IB/ehca: Improve latency by unlocking the SQ/RQ after triggering the hardware

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 9 Jul 2007 15:33:52 +0200
From:	Joachim Fenkes <fenkes@...ibm.com>
To:	"LinuxPPC-Dev" <linuxppc-dev@...abs.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"OF-General" <general@...ts.openfabrics.org>,
	Roland Dreier <rolandd@...co.com>
Cc:	"Hoang-Nam Nguyen" <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Stefan Roscher <stefan.roscher@...ibm.com>
Subject: [PATCH 13/13] IB/ehca: Improve latency by unlocking the SQ/RQ after triggering the hardware

From: Hoang-Nam Nguyen <hnguyen@...ibm.com>

Signed-off-by: Joachim Fenkes <fenkes@...ibm.com>
---
 drivers/infiniband/hw/ehca/ehca_reqs.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c
index fd3ba22..61da65e 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -407,10 +407,9 @@ int ehca_post_send(struct ib_qp *qp,
 	} /* eof for cur_send_wr */
 
 post_send_exit0:
-	/* UNLOCK the QUEUE */
-	spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
 	iosync(); /* serialize GAL register access */
 	hipz_update_sqa(my_qp, wqe_cnt);
+	spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
 	return ret;
 }
 
@@ -473,9 +472,9 @@ static int internal_post_recv(struct ehca_qp *my_qp,
 	} /* eof for cur_recv_wr */
 
 post_recv_exit0:
-	spin_unlock_irqrestore(&my_qp->spinlock_r, flags);
 	iosync(); /* serialize GAL register access */
 	hipz_update_rqa(my_qp, wqe_cnt);
+	spin_unlock_irqrestore(&my_qp->spinlock_r, flags);
 	return ret;
 }
 
-- 
1.5.2


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/