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quota: remove dqptr_sem

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Remove dqptr_sem to make quota code scalable: Remove the dqptr_sem,
accessing inode->i_dquot now protected by dquot_srcu, and changing
inode->i_dquot is now serialized by dq_data_lock.

Signed-off-by: Lai Siyao <[email protected]>
Signed-off-by: Niu Yawei <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
This commit is contained in:
Niu Yawei 2014-06-04 12:23:19 +08:00 • committed by Jan Kara
commit b9ba6f94b2
3 changed files with 49 additions and 67 deletions
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1
fs/super.c
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@ -218,7 +218,6 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
lockdep_set_class(&s->s_vfs_rename_mutex, &type->s_vfs_rename_key);
mutex_init(&s->s_dquot.dqio_mutex);
mutex_init(&s->s_dquot.dqonoff_mutex);
init_rwsem(&s->s_dquot.dqptr_sem);
s->s_maxbytes = MAX_NON_LFS;
s->s_op = &default_op;
s->s_time_gran = 1000000000;