4.19-stable review patch. If anyone has any objections, please let me know.
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From: Josef Bacik josef@toxicpanda.com
commit 30928e9baac238a7330085a1c5747f0b5df444b4 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/btrfs/transaction.c | 9 --------- 1 file changed, 9 deletions(-)
--- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -2280,15 +2280,6 @@ int btrfs_commit_transaction(struct btrf
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: