A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 11:11:45 -04:00
Code Issues Projects Releases Packages Wiki Activity

jbd2: track more dependencies on transaction commit

Browse source 
So far we were tracking only dependency on transaction commit due to
starting a new handle (which may require commit to start a new
transaction). Now add tracking also for other cases where we wait for
transaction commit. This way lockdep can catch deadlocks e. g. because we
call jbd2_journal_stop() for a synchronous handle with some locks held
which rank below transaction start.

Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>
This commit is contained in:
Jan Kara 2016-06-30 11:40:54 -04:00 • committed by Theodore Ts'o
commit 1eaa566d36
3 changed files with 11 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
fs/jbd2/journal.c
View file

@ -691,6 +691,7 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
{
int err = 0;
jbd2_might_wait_for_commit(journal);
read_lock(&journal->j_state_lock);
#ifdef CONFIG_JBD2_DEBUG
if (!tid_geq(journal->j_commit_request, tid)) {

4
fs/jbd2/transaction.c
View file

@ -182,6 +182,8 @@ static int add_transaction_credits(journal_t *journal, int blocks,
int needed;
int total = blocks + rsv_blocks;
jbd2_might_wait_for_commit(journal);
/*
* If the current transaction is locked down for commit, wait
* for the lock to be released.
@ -695,6 +697,8 @@ void jbd2_journal_lock_updates(journal_t *journal)
{
DEFINE_WAIT(wait);
jbd2_might_wait_for_commit(journal);
write_lock(&journal->j_state_lock);
++journal->j_barrier_count;