The patch titled
lockdep: annotate BLKPG_DEL_PARTITION
has been removed from the -mm tree. Its filename was
lockdep-annotate-blkpg_del_partition.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: lockdep: annotate BLKPG_DEL_PARTITION
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
>=============================================
>[ INFO: possible recursive locking detected ]
>2.6.19-1.2909.fc7 #1
>---------------------------------------------
>anaconda/587 is trying to acquire lock:
> (&bdev->bd_mutex){--..}, at: [<c05fb380>] mutex_lock+0x21/0x24
>
>but task is already holding lock:
> (&bdev->bd_mutex){--..}, at: [<c05fb380>] mutex_lock+0x21/0x24
>
>other info that might help us debug this:
>1 lock held by anaconda/587:
> #0: (&bdev->bd_mutex){--..}, at: [<c05fb380>] mutex_lock+0x21/0x24
>
>stack backtrace:
> [<c0405812>] show_trace_log_lvl+0x1a/0x2f
> [<c0405db2>] show_trace+0x12/0x14
> [<c0405e36>] dump_stack+0x16/0x18
> [<c043bd84>] __lock_acquire+0x116/0xa09
> [<c043c960>] lock_acquire+0x56/0x6f
> [<c05fb1fa>] __mutex_lock_slowpath+0xe5/0x24a
> [<c05fb380>] mutex_lock+0x21/0x24
> [<c04d82fb>] blkdev_ioctl+0x600/0x76d
> [<c04946b1>] block_ioctl+0x1b/0x1f
> [<c047ed5a>] do_ioctl+0x22/0x68
> [<c047eff2>] vfs_ioctl+0x252/0x265
> [<c047f04e>] sys_ioctl+0x49/0x63
> [<c0404070>] syscall_call+0x7/0xb
Annotate BLKPG_DEL_PARTITION's bd_mutex locking and add a little comment
clarifying the bd_mutex locking, because I confused myself and initially
thought the lock order was wrong too.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/ioctl.c | 2 +-
fs/block_dev.c | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff -puN block/ioctl.c~lockdep-annotate-blkpg_del_partition block/ioctl.c
--- a/block/ioctl.c~lockdep-annotate-blkpg_del_partition
+++ a/block/ioctl.c
@@ -82,7 +82,7 @@ static int blkpg_ioctl(struct block_devi
fsync_bdev(bdevp);
invalidate_bdev(bdevp, 0);
- mutex_lock(&bdev->bd_mutex);
+ mutex_lock_nested(&bdev->bd_mutex, 1);
delete_partition(disk, part);
mutex_unlock(&bdev->bd_mutex);
mutex_unlock(&bdevp->bd_mutex);
diff -puN fs/block_dev.c~lockdep-annotate-blkpg_del_partition fs/block_dev.c
--- a/fs/block_dev.c~lockdep-annotate-blkpg_del_partition
+++ a/fs/block_dev.c
@@ -1101,6 +1101,13 @@ static int __blkdev_get(struct block_dev
int for_part);
static int __blkdev_put(struct block_device *bdev, int for_part);
+/*
+ * bd_mutex locking:
+ *
+ * mutex_lock(part->bd_mutex)
+ * mutex_lock_nested(whole->bd_mutex, 1)
+ */
+
static int do_open(struct block_device *bdev, struct file *file, int for_part)
{
struct module *owner = NULL;
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
nfs-fix-congestion-control-v4.patch
lumpy-reclaim-v2.patch
lumpy-reclaim-v2-page_to_pfn-fix.patch
lumpy-reclaim-v2-tidy.patch
-
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