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Jan Kara d7961c7fa4 jbd2: fix assertion failure in jbd2_journal_flush() ... The following race is possible between start_this_handle() and someone calling jbd2_journal_flush(). Process A Process B start_this_handle(). if (journal->j_barrier_count) # false if (!journal->j_running_transaction) { #true read_unlock(&journal->j_state_lock); jbd2_journal_lock_updates() jbd2_journal_flush() write_lock(&journal->j_state_lock); if (journal->j_running_transaction) { # false ... wait for committing trans ... write_unlock(&journal->j_state_lock); ... write_lock(&journal->j_state_lock); if (!journal->j_running_transaction) { # true jbd2_get_transaction(journal, new_transaction); write_unlock(&journal->j_state_lock); goto repeat; # eventually blocks on j_barrier_count > 0 ... J_ASSERT(!journal->j_running_transaction); # fails We fix the race by rechecking j_barrier_count after reacquiring j_state_lock in exclusive mode. Reported-by: yjwsignal@empal.com Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org		12 years ago
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Kconfig	jbd2: Grab a reference to the crc32c driver if necessary	13 years ago
Makefile	…
checkpoint.c	…
commit.c	jbd2: fix assertion failure in commit code due to lacking transaction credits	13 years ago
journal.c	ext4: remove ext4_handle_release_buffer()	12 years ago
recovery.c	jbd2: check return value of blkdev_issue_flush()	13 years ago
revoke.c	jbd2: checksum revocation blocks	13 years ago
transaction.c	jbd2: fix assertion failure in jbd2_journal_flush()	12 years ago