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bcachefs: Optimize bch2_journal_flush_seq_async()

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Avoid taking the journal lock if we don't have to.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-11-20 19:27:57 -05:00 committed by Kent Overstreet
parent 7b48920770
commit 33b3b1dc0f
1 changed files with 9 additions and 1 deletions
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10
fs/bcachefs/journal.c
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@ -547,12 +547,20 @@ out:
* necessary * necessary
*/ */
int bch2_journal_flush_seq_async(struct journal *j, u64 seq, int bch2_journal_flush_seq_async(struct journal *j, u64 seq,
struct closure *parent) struct closure *parent)
{ {
struct journal_buf *buf; struct journal_buf *buf;
int ret = 0; int ret = 0;
if (seq <= j->err_seq)
return -EIO;
if (seq <= j->seq_ondisk)
return 1;
spin_lock(&j->lock); spin_lock(&j->lock);
/* Recheck under lock: */
if (seq <= j->err_seq) { if (seq <= j->err_seq) {
ret = -EIO; ret = -EIO;
goto out; goto out;