Hi,
On Sat 27-03-10 15:15:38, Dmitry Monakhov wrote:
> - Skipp locking if quota is dirty already.
> - Return old quota state to help fs-specciffic implementation to optimize
> case where quota was dirty already.
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
> ---
> fs/quota/dquot.c | 13 +++++++++++--
> 1 files changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> index e0b870f..88a8ef2 100644
> --- a/fs/quota/dquot.c
> +++ b/fs/quota/dquot.c
> @@ -319,14 +319,23 @@ static inline int mark_dquot_dirty(struct dquot *dquot)
> return dquot->dq_sb->dq_op->mark_dirty(dquot);
> }
>
> +/* Mark dquot dirty in atomic meaner, and return it's old dirty flag state */
> int dquot_mark_dquot_dirty(struct dquot *dquot)
> {
> + int ret = 1;
> +
> + /* If quota is dirtly already we don't have to acquire dq_list_lock */
> + if (test_bit(DQ_MOD_B, &dquot->dq_flags))
> + return 1;
> +
> spin_lock(&dq_list_lock);
> - if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags))
> + if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) {
> list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
> info[dquot->dq_type].dqi_dirty_list);
> + ret = 0;
> + }
> spin_unlock(&dq_list_lock);
> - return 0;
> + return ret;
> }
> EXPORT_SYMBOL(dquot_mark_dquot_dirty);
OK, this looks fine. Merged.
Honza
--
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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