From: Naohiro Aota <naohiro.aota@wdc.com>
To: Josef Bacik <josef@toxicpanda.com>
Cc: linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>,
Chris Mason <clm@fb.com>, Nikolay Borisov <nborisov@suse.com>,
Damien Le Moal <damien.lemoal@wdc.com>,
Johannes Thumshirn <Johannes.Thumshirn@wdc.com>,
Hannes Reinecke <hare@suse.com>,
Anand Jain <anand.jain@oracle.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v2 19/21] btrfs: factor out chunk_allocation_failed()
Date: Thu, 20 Feb 2020 18:57:54 +0900 [thread overview]
Message-ID: <20200220095754.hqdqlnuueea2nny6@naota.dhcp.fujisawa.hgst.com> (raw)
In-Reply-To: <b9579637-fb57-6b02-48fa-46878136cf8c@toxicpanda.com>
On Thu, Feb 13, 2020 at 02:52:08PM -0500, Josef Bacik wrote:
>On 2/12/20 2:20 AM, Naohiro Aota wrote:
>>Factor out chunk_allocation_failed() from find_free_extent_update_loop().
>>This function is called when it failed to allocate a chunk. The function
>>can modify "ffe_ctl->loop" and return 0 to continue with the next stage.
>>Or, it can return -ENOSPC to give up here.
>>
>>Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
>>---
>> fs/btrfs/extent-tree.c | 24 ++++++++++++++++--------
>> 1 file changed, 16 insertions(+), 8 deletions(-)
>>
>>diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
>>index efc653e6be29..8f0d489f76fa 100644
>>--- a/fs/btrfs/extent-tree.c
>>+++ b/fs/btrfs/extent-tree.c
>>@@ -3748,6 +3748,21 @@ static void found_extent(struct find_free_extent_ctl *ffe_ctl,
>> }
>> }
>>+static int chunk_allocation_failed(struct find_free_extent_ctl *ffe_ctl)
>>+{
>>+ switch (ffe_ctl->policy) {
>>+ case BTRFS_EXTENT_ALLOC_CLUSTERED:
>>+ /*
>>+ * If we can't allocate a new chunk we've already looped through
>>+ * at least once, move on to the NO_EMPTY_SIZE case.
>>+ */
>>+ ffe_ctl->loop = LOOP_NO_EMPTY_SIZE;
>>+ return 0;
>>+ default:
>>+ BUG();
>>+ }
>>+}
>>+
>> /*
>> * Return >0 means caller needs to re-search for free extent
>> * Return 0 means we have the needed free extent.
>>@@ -3819,19 +3834,12 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info,
>> ret = btrfs_chunk_alloc(trans, ffe_ctl->flags,
>> CHUNK_ALLOC_FORCE);
>>- /*
>>- * If we can't allocate a new chunk we've already looped
>>- * through at least once, move on to the NO_EMPTY_SIZE
>>- * case.
>>- */
>> if (ret == -ENOSPC)
>>- ffe_ctl->loop = LOOP_NO_EMPTY_SIZE;
>>+ ret = chunk_allocation_failed(ffe_ctl);
>> /* Do not bail out on ENOSPC since we can do more. */
>> if (ret < 0 && ret != -ENOSPC)
>> btrfs_abort_transaction(trans, ret);
>>- else
>>- ret = 0;
>
>You can't delete this, btrfs_chunk_alloc() will return 1 if it
>succeeded, and we'll leak that out somewhere and bad things will
>happen. Thanks,
>
>Josef
Ah, I missed that case... I'll fix in the next series.
Thanks,
next prev parent reply other threads:[~2020-02-20 9:57 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-12 7:20 [PATCH v2 00/21] btrfs: refactor and generalize chunk/dev_extent/extent allocation Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 01/21] btrfs: change type of full_search to bool Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 02/21] btrfs: do not BUG_ON with invalid profile Naohiro Aota
2020-02-12 7:58 ` Johannes Thumshirn
2020-02-12 14:14 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 03/21] btrfs: introduce chunk allocation policy Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 04/21] btrfs: refactor find_free_dev_extent_start() Naohiro Aota
2020-02-12 14:16 ` Josef Bacik
2020-02-13 11:32 ` Johannes Thumshirn
2020-02-12 7:20 ` [PATCH v2 05/21] btrfs: introduce alloc_chunk_ctl Naohiro Aota
2020-02-12 8:00 ` Johannes Thumshirn
2020-02-13 16:17 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 06/21] btrfs: factor out init_alloc_chunk_ctl Naohiro Aota
2020-02-13 16:20 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 07/21] btrfs: factor out gather_device_info() Naohiro Aota
2020-02-12 8:04 ` Johannes Thumshirn
2020-02-12 7:20 ` [PATCH v2 08/21] btrfs: factor out decide_stripe_size() Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 09/21] btrfs: factor out create_chunk() Naohiro Aota
2020-02-12 8:07 ` Johannes Thumshirn
2020-02-13 16:24 ` Josef Bacik
2020-02-20 10:17 ` Naohiro Aota
2020-02-12 7:20 ` [PATCH v2 10/21] btrfs: parameterize dev_extent_min Naohiro Aota
2020-02-13 16:27 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 11/21] btrfs: introduce extent allocation policy Naohiro Aota
2020-02-13 19:55 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 12/21] btrfs: move hint_byte into find_free_extent_ctl Naohiro Aota
2020-02-12 14:11 ` Johannes Thumshirn
2020-02-13 19:56 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 13/21] btrfs: move vairalbes for clustered allocation " Naohiro Aota
2020-02-12 14:14 ` Johannes Thumshirn
2020-02-13 19:57 ` Josef Bacik
2020-02-20 14:27 ` Christoph Hellwig
2020-02-12 7:20 ` [PATCH v2 14/21] btrfs: factor out do_allocation() Naohiro Aota
2020-02-12 14:45 ` Johannes Thumshirn
2020-02-13 19:57 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 15/21] btrfs: drop unnecessary arguments from clustered allocation functions Naohiro Aota
2020-02-12 14:47 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 16/21] btrfs: factor out release_block_group() Naohiro Aota
2020-02-12 14:48 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 17/21] btrfs: factor out found_extent() Naohiro Aota
2020-02-12 14:50 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 18/21] btrfs: drop unnecessary arguments from find_free_extent_update_loop() Naohiro Aota
2020-02-12 14:51 ` Johannes Thumshirn
2020-02-13 19:58 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 19/21] btrfs: factor out chunk_allocation_failed() Naohiro Aota
2020-02-12 14:56 ` Johannes Thumshirn
2020-02-13 19:52 ` Josef Bacik
2020-02-20 9:57 ` Naohiro Aota [this message]
2020-02-12 7:20 ` [PATCH v2 20/21] btrfs: skip LOOP_NO_EMPTY_SIZE if not clustered allocation Naohiro Aota
2020-02-13 19:55 ` Josef Bacik
2020-02-20 9:56 ` Naohiro Aota
2020-02-20 15:40 ` Josef Bacik
2020-02-12 7:20 ` [PATCH v2 21/21] btrfs: factor out prepare_allocation() Naohiro Aota
2020-02-13 19:59 ` Josef Bacik
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