From a794c9ad026f0a28044347f31929fcdb0270eadc Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Mon, 1 Jul 2024 15:28:00 +0200 Subject: [PATCH] jbd2: increase maximum transaction size Originally, we were quite conservative in limiting maximum transaction size to a quarter of the journal because we were not accounting transaction descriptor and revoke blocks. These days we do properly account them and reserve space for them from the total transaction credits. Thus there's no need to be so conservative and we can increase the maximum transaction size to one third of the journal (even half should work fine in principle but the performance will likely suffer in that case). This also fixes failures to grow filesystems with tiny journals. Link: CA+hUFcuGs04JHZ_WzA1zGN57+ehL2qmHOt5a7RMpo+rv6Vyxtw@mail.gmail.com Signed-off-by: Jan Kara Reviewed-by: Zhang Yi Link: https://patch.msgid.link/20240701132800.7158-1-jack@suse.cz Signed-off-by: Theodore Ts'o --- fs/jbd2/journal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 25d373fac2f2..1ebf2393bfb7 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1429,7 +1429,7 @@ static int journal_revoke_records_per_block(journal_t *journal) static int jbd2_journal_get_max_txn_bufs(journal_t *journal) { - return (journal->j_total_len - journal->j_fc_wbufsize) / 4; + return (journal->j_total_len - journal->j_fc_wbufsize) / 3; } /*