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From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Cc: Ursula Braun <braunu@de.ibm.com>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [patch 13/13] qdio: FCP/SCSI write I/O stagnates on LPAR
Date: Tue, 19 Feb 2008 15:41:00 +0100	[thread overview]
Message-ID: <20080219144506.067881522@de.ibm.com> (raw)
In-Reply-To: <20080219144047.587547541@de.ibm.com>

[-- Attachment #1: 013-qdio-stalls.diff --]
[-- Type: text/plain, Size: 940 bytes --]

From: Ursula Braun <braunu@de.ibm.com>

If running on LPAR, qdio might overlook an incoming buffer in certain
scenarios. The patch makes sure that incoming buffers are detected
immediately in all situations.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

 drivers/s390/cio/qdio.c |    3 ---
 1 file changed, 3 deletions(-)

Index: quilt-2.6/drivers/s390/cio/qdio.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/qdio.c
+++ quilt-2.6/drivers/s390/cio/qdio.c
@@ -1215,9 +1215,6 @@ tiqdio_is_inbound_q_done(struct qdio_q *
 
 	if (!no_used)
 		return 1;
-	if (!q->siga_sync && !irq->is_qebsm)
-		/* we'll check for more primed buffers in qeth_stop_polling */
-		return 0;
 	if (irq->is_qebsm) {
 		count = 1;
 		start_buf = q->first_to_check;

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.


      parent reply	other threads:[~2008-02-19 14:49 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-19 14:40 [patch 00/13] s390 bux fixes for 2.6.25-rc2 Martin Schwidefsky
2008-02-19 14:40 ` [patch 01/13] cio: Remember to initialize recovery_lock Martin Schwidefsky
2008-02-19 14:40 ` [patch 02/13] cio: Do timed recovery on workqueue Martin Schwidefsky
2008-02-19 14:40 ` [patch 03/13] Let NR_CPUS default to 32/64 on s390/s390x Martin Schwidefsky
2008-02-19 14:40 ` [patch 04/13] Make sure enabled wait psw is loaded in default_idle Martin Schwidefsky
2008-02-19 14:40 ` [patch 05/13] dasd: fix locking in __dasd_device_process_final_queue Martin Schwidefsky
2008-02-19 14:40 ` [patch 06/13] find bit corner case Martin Schwidefsky
2008-02-19 14:40 ` [patch 07/13] Initialize per cpu lowcores on cpu hotplug Martin Schwidefsky
2008-02-19 15:13   ` Bastian Blank
2008-02-19 15:38     ` Heiko Carstens
2008-02-19 15:41       ` Heiko Carstens
2008-02-19 18:44         ` Segher Boessenkool
2008-02-20  9:45           ` Heiko Carstens
2008-02-20 10:09             ` Bastian Blank
2008-02-20 10:24               ` Heiko Carstens
2008-02-19 14:40 ` [patch 08/13] qdio: fix qdio_activate timeout handling Martin Schwidefsky
2008-02-19 14:40 ` [patch 09/13] etr: fix compile error on !SMP Martin Schwidefsky
2008-02-19 14:40 ` [patch 10/13] sclp: clean up send/receive naming scheme Martin Schwidefsky
2008-02-19 14:40 ` [patch 11/13] dcss: Fix Unlikely(x) != y Martin Schwidefsky
2008-02-19 14:40 ` [patch 12/13] Fix futex_atomic_cmpxchg_std inline assembly Martin Schwidefsky
2008-02-19 14:41 ` Martin Schwidefsky [this message]

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