diff options
| author | Ingo Molnar <mingo@kernel.org> | 2016-08-10 14:11:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-08-10 14:11:54 +0200 |
| commit | a2071cd765637002523798358d2ca441306d708b (patch) | |
| tree | bafac1682bfa91457439cad09d2eeea71f2ad3bf /include/linux/jbd2.h | |
| parent | 784bdf3bb694b256fcd6120b93e8947a84249a3a (diff) | |
| parent | a0cba2179ea4c1820fce2ee046b6ed90ecc56196 (diff) | |
Merge branch 'linus' into locking/urgent, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/jbd2.h')
| -rw-r--r-- | include/linux/jbd2.h | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index efb232c5f668..dfaa1f4dcb0c 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -491,10 +491,6 @@ struct jbd2_journal_handle unsigned long h_start_jiffies; unsigned int h_requested_credits; - -#ifdef CONFIG_DEBUG_LOCK_ALLOC - struct lockdep_map h_lockdep_map; -#endif }; @@ -793,6 +789,7 @@ jbd2_time_diff(unsigned long start, unsigned long end) * @j_proc_entry: procfs entry for the jbd statistics directory * @j_stats: Overall statistics * @j_private: An opaque pointer to fs-private information. + * @j_trans_commit_map: Lockdep entity to track transaction commit dependencies */ struct journal_s @@ -1035,8 +1032,26 @@ struct journal_s /* Precomputed journal UUID checksum for seeding other checksums */ __u32 j_csum_seed; + +#ifdef CONFIG_DEBUG_LOCK_ALLOC + /* + * Lockdep entity to track transaction commit dependencies. Handles + * hold this "lock" for read, when we wait for commit, we acquire the + * "lock" for writing. This matches the properties of jbd2 journalling + * where the running transaction has to wait for all handles to be + * dropped to commit that transaction and also acquiring a handle may + * require transaction commit to finish. + */ + struct lockdep_map j_trans_commit_map; +#endif }; +#define jbd2_might_wait_for_commit(j) \ + do { \ + rwsem_acquire(&j->j_trans_commit_map, 0, 0, _THIS_IP_); \ + rwsem_release(&j->j_trans_commit_map, 1, _THIS_IP_); \ + } while (0) + /* journal feature predicate functions */ #define JBD2_FEATURE_COMPAT_FUNCS(name, flagname) \ static inline bool jbd2_has_feature_##name(journal_t *j) \ |