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btrfs: don't run delayed_iputs in commit

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This could result in a really bad case where we do something like

evict
  evict_refill_and_join
    btrfs_commit_transaction
      btrfs_run_delayed_iputs
        evict
          evict_refill_and_join
            btrfs_commit_transaction
... forever

We have plenty of other places where we run delayed iputs that are much
safer, let those do the work.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2018-10-11 15:54:31 -04:00 committed by David Sterba
parent 80ee54bfe8
commit 30928e9baa
1 changed files with 0 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
fs/btrfs/transaction.c
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@ -2283,15 +2283,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
kmem_cache_free(btrfs_trans_handle_cachep, trans);
/*
* If fs has been frozen, we can not handle delayed iputs, otherwise
* it'll result in deadlock about SB_FREEZE_FS.
*/
if (current != fs_info->transaction_kthread &&
current != fs_info->cleaner_kthread &&
!test_bit(BTRFS_FS_FROZEN, &fs_info->flags))
btrfs_run_delayed_iputs(fs_info);
return ret;
scrub_continue: