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ext3: Replace lock/unlock_super() with an explicit lock for resizing

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Use a separate lock to protect s_groups_count and the other block
group descriptors which get changed via an on-line resize operation,
so we can stop overloading the use of lock_super().

Port of ext4 commit 32ed5058ce by
Theodore Ts'o <tytso@mit.edu>.

CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Eric Sandeen 2009-12-14 13:01:05 -06:00 • committed by Jan Kara
commit 96d2a495c2
3 changed files with 20 additions and 17 deletions
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1
include/linux/ext3_fs_sb.h
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@ -73,6 +73,7 @@ struct ext3_sb_info {
struct journal_s * s_journal;
struct list_head s_orphan;
struct mutex s_orphan_lock;
struct mutex s_resize_lock;
unsigned long s_commit_interval;
struct block_device *journal_bdev;
#ifdef CONFIG_JBD_DEBUG