diff options
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index d5db408ae064..6cc035321562 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -910,6 +910,29 @@ struct journal_s struct buffer_head *j_chkpt_bhs[JBD2_NR_BATCH]; /** + * @j_shrinker: + * + * Journal head shrinker, reclaim buffer's journal head which + * has been written back. + */ + struct shrinker j_shrinker; + + /** + * @j_jh_shrink_count: + * + * Number of journal buffers on the checkpoint list. [j_list_lock] + */ + struct percpu_counter j_jh_shrink_count; + + /** + * @j_shrink_transaction: + * + * Record next transaction will shrink on the checkpoint list. + * [j_list_lock] + */ + transaction_t *j_shrink_transaction; + + /** * @j_head: * * Journal head: identifies the first unused block in the journal. @@ -1422,6 +1445,7 @@ extern void jbd2_journal_commit_transaction(journal_t *); /* Checkpoint list management */ void __jbd2_journal_clean_checkpoint_list(journal_t *journal, bool destroy); +unsigned long jbd2_journal_shrink_checkpoint_list(journal_t *journal, unsigned long *nr_to_scan); int __jbd2_journal_remove_checkpoint(struct journal_head *); void jbd2_journal_destroy_checkpoint(journal_t *journal); void __jbd2_journal_insert_checkpoint(struct journal_head *, transaction_t *); @@ -1532,6 +1556,8 @@ extern int jbd2_journal_set_features (journal_t *, unsigned long, unsigned long, unsigned long); extern void jbd2_journal_clear_features (journal_t *, unsigned long, unsigned long, unsigned long); +extern int jbd2_journal_register_shrinker(journal_t *journal); +extern void jbd2_journal_unregister_shrinker(journal_t *journal); extern int jbd2_journal_load (journal_t *journal); extern int jbd2_journal_destroy (journal_t *); extern int jbd2_journal_recover (journal_t *journal); |