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From: NeilBrown <neilb@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 004 of 9] md: Clean up irregularity with raid autodetect.
Date: Mon, 3 Mar 2008 11:17:24 +1100	[thread overview]
Message-ID: <1080303001724.23623@suse.de> (raw)
In-Reply-To: <20080303111240.23302.patches@notabene>


When a raid1 array is stopped, all components currently get added
to the list for auto-detection.  However we should really only add
components that were found by autodetection in the first place.
So add a flag to record that information, and use it.


Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/md.c           |    4 +++-
 ./include/linux/raid/md_k.h |    1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c	2008-02-22 15:46:10.000000000 +1100
+++ ./drivers/md/md.c	2008-02-22 15:46:25.000000000 +1100
@@ -1503,7 +1503,8 @@ static void export_rdev(mdk_rdev_t * rde
 	free_disk_sb(rdev);
 	list_del_init(&rdev->same_set);
 #ifndef MODULE
-	md_autodetect_dev(rdev->bdev->bd_dev);
+	if (test_bit(AutoDetected, &rdev->flags))
+		md_autodetect_dev(rdev->bdev->bd_dev);
 #endif
 	unlock_rdev(rdev);
 	kobject_put(&rdev->kobj);
@@ -6025,6 +6026,7 @@ static void autostart_arrays(int part)
 			MD_BUG();
 			continue;
 		}
+		set_bit(AutoDetected, &rdev->flags);
 		list_add(&rdev->same_set, &pending_raid_disks);
 		i_passed++;
 	}

diff .prev/include/linux/raid/md_k.h ./include/linux/raid/md_k.h
--- .prev/include/linux/raid/md_k.h	2008-02-22 15:46:25.000000000 +1100
+++ ./include/linux/raid/md_k.h	2008-02-22 15:46:25.000000000 +1100
@@ -83,6 +83,7 @@ struct mdk_rdev_s
 #define	BarriersNotsupp	5		/* BIO_RW_BARRIER is not supported */
 #define	AllReserved	6		/* If whole device is reserved for
 					 * one array */
+#define	AutoDetected	7		/* added by auto-detect */
 
 	int desc_nr;			/* descriptor index in the superblock */
 	int raid_disk;			/* role of device in array */

  parent reply	other threads:[~2008-03-03  0:18 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-03  0:16 [PATCH 000 of 9] md: Introduction EXPLAIN PATCH SET HERE NeilBrown
2008-03-03  0:17 ` [PATCH 001 of 9] md: Fix deadlock in md/raid1 and md/raid10 when handling a read error NeilBrown
2008-03-03 15:54   ` Andre Noll
2008-03-04  6:08     ` Neil Brown
2008-03-04 11:29       ` Andre Noll
2008-03-06  3:29         ` Neil Brown
2008-03-06 10:51           ` Andre Noll
2008-03-03  0:17 ` [PATCH 002 of 9] md: Reduce CPU wastage on idle md array with a write-intent bitmap NeilBrown
2008-03-03  0:17 ` [PATCH 003 of 9] md: Guard against possible bad array geometry in v1 metadata NeilBrown
2008-03-03  0:17 ` NeilBrown [this message]
2008-03-03  0:17 ` [PATCH 005 of 9] md: Make sure a reshape is started when device switches to read-write NeilBrown
2008-03-03  0:17 ` [PATCH 006 of 9] md: Lock access to rdev attributes properly NeilBrown
2008-03-03  0:17 ` [PATCH 007 of 9] md: Don't attempt read-balancing for raid10 'far' layouts NeilBrown
2008-03-03  0:17 ` [PATCH 008 of 9] md: Fix possible raid1/raid10 deadlock on read error during resync NeilBrown
2008-03-03  0:18 ` [PATCH 009 of 9] md: The md RAID10 resync thread could cause a md RAID10 array deadlock NeilBrown

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