From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: linux-kernel@vger.kernel.org, horst.hummel@de.ibm.com
Subject: [S390] Enhanced handling of failed termination requests.
Date: Mon, 4 Dec 2006 15:52:39 +0100 [thread overview]
Message-ID: <20061204145239.GL32059@skybase> (raw)
From: Horst Hummel <horst.hummel@de.ibm.com>
[S390] Enhanced handling of failed termination requests.
In case a request timed out and termination did not work, the console was
flooded with retry messages (every 1/10s). Now we use a 5s delay per retry and
generate a more precise message.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
drivers/s390/block/dasd.c | 16 +++++++++++-----
1 files changed, 11 insertions(+), 5 deletions(-)
diff -urpN linux-2.6/drivers/s390/block/dasd.c linux-2.6-patched/drivers/s390/block/dasd.c
--- linux-2.6/drivers/s390/block/dasd.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/drivers/s390/block/dasd.c 2006-12-04 14:50:42.000000000 +0100
@@ -1264,15 +1264,21 @@ __dasd_check_expire(struct dasd_device *
if (list_empty(&device->ccw_queue))
return;
cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list);
- if (cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) {
- if (time_after_eq(jiffies, cqr->expires + cqr->starttime)) {
+ if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) &&
+ (time_after_eq(jiffies, cqr->expires + cqr->starttime))) {
+ if (device->discipline->term_IO(cqr) != 0) {
+ /* Hmpf, try again in 5 sec */
+ dasd_set_timer(device, 5*HZ);
+ DEV_MESSAGE(KERN_ERR, device,
+ "internal error - timeout (%is) expired "
+ "for cqr %p, termination failed, "
+ "retrying in 5s",
+ (cqr->expires/HZ), cqr);
+ } else {
DEV_MESSAGE(KERN_ERR, device,
"internal error - timeout (%is) expired "
"for cqr %p (%i retries left)",
(cqr->expires/HZ), cqr, cqr->retries);
- if (device->discipline->term_IO(cqr) != 0)
- /* Hmpf, try again in 1/10 sec */
- dasd_set_timer(device, 10);
}
}
}
reply other threads:[~2006-12-04 14:52 UTC|newest]
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