>============================================= >[ 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 <[EMAIL PROTECTED]> --- block/ioctl.c | 2 +- fs/block_dev.c | 7 +++++++ 2 files changed, 8 insertions(+), 1 deletion(-) Index: linux-2.6.20.noarch/block/ioctl.c =================================================================== --- linux-2.6.20.noarch.orig/block/ioctl.c +++ linux-2.6.20.noarch/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); Index: linux-2.6.20.noarch/fs/block_dev.c =================================================================== --- linux-2.6.20.noarch.orig/fs/block_dev.c +++ linux-2.6.20.noarch/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; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/