From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f177.google.com ([209.85.216.177]:45819 "EHLO mail-qt0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727067AbeH3VqG (ORCPT ); Thu, 30 Aug 2018 17:46:06 -0400 Received: by mail-qt0-f177.google.com with SMTP id g44-v6so11257305qtb.12 for ; Thu, 30 Aug 2018 10:42:50 -0700 (PDT) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id w9-v6sm5170148qta.13.2018.08.30.10.42.49 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 30 Aug 2018 10:42:49 -0700 (PDT) From: Josef Bacik To: linux-btrfs@vger.kernel.org Subject: [PATCH 12/35] btrfs: add ALLOC_CHUNK_FORCE to the flushing code Date: Thu, 30 Aug 2018 13:42:02 -0400 Message-Id: <20180830174225.2200-13-josef@toxicpanda.com> In-Reply-To: <20180830174225.2200-1-josef@toxicpanda.com> References: <20180830174225.2200-1-josef@toxicpanda.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: With my change to no longer take into account the global reserve for metadata allocation chunks we have this side-effect for mixed block group fs'es where we are no longer allocating enough chunks for the data/metadata requirements. To deal with this add a ALLOC_CHUNK_FORCE step to the flushing state machine. This will only get used if we've already made a full loop through the flushing machinery and tried committing the transaction. If we have then we can try and force a chunk allocation since we likely need it to make progress. This resolves the issues I was seeing with the mixed bg tests in xfstests with my previous patch. Signed-off-by: Josef Bacik --- fs/btrfs/ctree.h | 3 ++- fs/btrfs/extent-tree.c | 7 ++++++- include/trace/events/btrfs.h | 1 + 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0a4e55703d48..791e287c2292 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2731,7 +2731,8 @@ enum btrfs_flush_state { FLUSH_DELALLOC = 5, FLUSH_DELALLOC_WAIT = 6, ALLOC_CHUNK = 7, - COMMIT_TRANS = 8, + ALLOC_CHUNK_FORCE = 8, + COMMIT_TRANS = 9, }; int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 783341e3653e..22e1f9f55f4f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4907,6 +4907,7 @@ static void flush_space(struct btrfs_fs_info *fs_info, btrfs_end_transaction(trans); break; case ALLOC_CHUNK: + case ALLOC_CHUNK_FORCE: trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans); @@ -4914,7 +4915,9 @@ static void flush_space(struct btrfs_fs_info *fs_info, } ret = do_chunk_alloc(trans, btrfs_metadata_alloc_profile(fs_info), - CHUNK_ALLOC_NO_FORCE); + (state == ALLOC_CHUNK) ? + CHUNK_ALLOC_NO_FORCE : + CHUNK_ALLOC_FORCE); btrfs_end_transaction(trans); if (ret > 0 || ret == -ENOSPC) ret = 0; @@ -5060,6 +5063,8 @@ static void btrfs_async_reclaim_metadata_space(struct work_struct *work) } } spin_unlock(&space_info->lock); + if (flush_state == ALLOC_CHUNK_FORCE && !commit_cycles) + flush_state++; } while (flush_state <= COMMIT_TRANS); } diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h index 7d205e50b09c..fdb23181b5b7 100644 --- a/include/trace/events/btrfs.h +++ b/include/trace/events/btrfs.h @@ -1051,6 +1051,7 @@ TRACE_EVENT(btrfs_trigger_flush, { FLUSH_DELAYED_REFS_NR, "FLUSH_DELAYED_REFS_NR"}, \ { FLUSH_DELAYED_REFS, "FLUSH_ELAYED_REFS"}, \ { ALLOC_CHUNK, "ALLOC_CHUNK"}, \ + { ALLOC_CHUNK_FORCE, "ALLOC_CHUNK_FORCE"}, \ { COMMIT_TRANS, "COMMIT_TRANS"}) TRACE_EVENT(btrfs_flush_space, -- 2.14.3