From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: [patch 8/12] s390: enable write barriers in the dasd driver.
Date: Fri, 22 Apr 2005 17:01:09 +0200 [thread overview]
Message-ID: <20050422150109.GH17508@mschwid3.boeblingen.de.ibm.com> (raw)
[patch 8/12] s390: enable write barriers in the dasd driver.
From: Stefan Weinhuber <wein@de.ibm.com>
The DASD device driver never reorders the I/O requests and relies on
the hardware to write all data to nonvolatile storage before signaling
a successful write. Hence, the only thing we have to do to support
write barriers is to set the queue ordered flag.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diffstat:
drivers/s390/block/dasd.c | 1 +
1 files changed, 1 insertion(+)
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 2005-04-22 15:45:04.000000000 +0200
+++ linux-2.6-patched/drivers/s390/block/dasd.c 2005-04-22 15:45:04.000000000 +0200
@@ -1635,6 +1635,7 @@ dasd_setup_queue(struct dasd_device * de
blk_queue_max_hw_segments(device->request_queue, -1L);
blk_queue_max_segment_size(device->request_queue, -1L);
blk_queue_segment_boundary(device->request_queue, -1L);
+ blk_queue_ordered(device->request_queue, 1);
}
/*
reply other threads:[~2005-04-22 15:04 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050422150109.GH17508@mschwid3.boeblingen.de.ibm.com \
--to=schwidefsky@de.ibm.com \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®