From: Nikolay Borisov <nborisov@suse.com>
To: dsterba@suse.cz, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 09/11] btrfs: Mark pinned log extents as excluded
Date: Thu, 30 Jan 2020 16:03:40 +0200 [thread overview]
Message-ID: <1b88a583-d90c-58e3-02b2-93c60a097110@suse.com> (raw)
In-Reply-To: <20200130135330.GR3929@twin.jikos.cz>
On 30.01.20 г. 15:53 ч., David Sterba wrote:
> On Mon, Jan 20, 2020 at 04:09:16PM +0200, Nikolay Borisov wrote:
>> In preparation to making pinned extents per-transaction ensure that
>> log such extents are always excluded from caching. To achieve this in
>> addition to marking them via btrfs_pin_extent_for_log_replay they also
>> need to be marked with btrfs_add_excluded_extent to prevent log tree
>> extent buffer being loaded by the free space caching thread. That's
>> required since log treeblocks are not recorded in the extent tree, hence
>> they always look free.
>>
>> Signed-off-by: Nikolay Borisov <nborisov@suse.com>
>> ---
>> fs/btrfs/extent-tree.c | 8 ++++++++
>> fs/btrfs/tree-log.c | 2 +-
>> 2 files changed, 9 insertions(+), 1 deletion(-)
>>
>> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
>> index 7dcf9217a622..d680f2ac336b 100644
>> --- a/fs/btrfs/extent-tree.c
>> +++ b/fs/btrfs/extent-tree.c
>> @@ -2634,6 +2634,8 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
>> struct btrfs_block_group *cache;
>> int ret;
>>
>> + btrfs_add_excluded_extent(trans->fs_info, bytenr, num_bytes);
>
> Again lack of error handling, I thought that untangling and cleaning up
> the extent pinning was motivated to actually handle the errors.
It is but it will be done in a follow up series. For now I want to have
the pinned extents be per-transaction and not be more broken (e.g. no
error handling) than we currently are.
>
>> +
>> cache = btrfs_lookup_block_group(trans->fs_info, bytenr);
>> if (!cache)
>> return -EINVAL;
>> @@ -2920,6 +2922,12 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans)
>> mutex_unlock(&fs_info->unused_bg_unpin_mutex);
>> break;
>> }
>> + if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags)) {
>> + clear_extent_bits(&fs_info->freed_extents[0], start,
>> + end, EXTENT_UPTODATE);
>> + clear_extent_bits(&fs_info->freed_extents[1], start,
>> + end, EXTENT_UPTODATE);
>> + }
>>
>> if (btrfs_test_opt(fs_info, DISCARD_SYNC))
>> ret = btrfs_discard_extent(fs_info, start,
>> diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
>> index b535d409a728..f89de24838d5 100644
>> --- a/fs/btrfs/tree-log.c
>> +++ b/fs/btrfs/tree-log.c
>> @@ -2994,7 +2994,7 @@ static inline void btrfs_remove_log_ctx(struct btrfs_root *root,
>> mutex_unlock(&root->log_mutex);
>> }
>>
>> -/*
>> +/*
>> * Invoked in log mutex context, or be sure there is no other task which
>> * can access the list.
>> */
>> --
>> 2.17.1
next prev parent reply other threads:[~2020-01-30 14:03 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 14:09 [PATCH 00/11] Make pinned extents tracking per-transaction Nikolay Borisov
2020-01-20 14:09 ` [PATCH 01/11] btrfs: Perform pinned cleanup directly in btrfs_destroy_delayed_refs Nikolay Borisov
2020-01-21 14:22 ` Josef Bacik
2020-01-30 13:51 ` David Sterba
2020-02-05 8:32 ` Nikolay Borisov
2020-01-20 14:09 ` [PATCH 02/11] btrfs: Make btrfs_pin_extent take trans handle Nikolay Borisov
2020-01-21 14:23 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 03/11] btrfs: Introduce unaccount_log_buffer Nikolay Borisov
2020-01-22 20:04 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 04/11] btrfs: Call btrfs_pin_reserved_extent only during active transaction Nikolay Borisov
2020-01-22 20:05 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 05/11] btrfs: Make btrfs_pin_reserved_extent take transaction Nikolay Borisov
2020-01-22 20:06 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 06/11] btrfs: Make btrfs_pin_extent_for_log_replay take transaction handle Nikolay Borisov
2020-01-22 20:06 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 07/11] btrfs: Make pin_down_extent take btrfs_trans_handle Nikolay Borisov
2020-01-22 20:07 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 08/11] btrfs: Pass trans handle to write_pinned_extent_entries Nikolay Borisov
2020-01-22 20:07 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 09/11] btrfs: Mark pinned log extents as excluded Nikolay Borisov
2020-01-22 20:12 ` Josef Bacik
2020-01-30 13:53 ` David Sterba
2020-01-30 14:03 ` Nikolay Borisov [this message]
2020-02-05 8:51 ` Nikolay Borisov
2020-01-20 14:09 ` [PATCH 10/11] btrfs: Factor out pinned extent clean up in btrfs_delete_unused_bgs Nikolay Borisov
2020-01-22 20:14 ` Josef Bacik
2020-01-20 14:09 ` [PATCH 11/11] btrfs: Use btrfs_transaction::pinned_extents Nikolay Borisov
2020-01-22 20:21 ` Josef Bacik
2020-01-23 8:54 ` Nikolay Borisov
2020-01-23 13:40 ` Josef Bacik
2020-01-24 10:35 ` [PATCH v2] " Nikolay Borisov
2020-01-24 13:51 ` Josef Bacik
2020-01-24 15:18 ` [PATCH v3] " Nikolay Borisov
2020-01-24 15:27 ` Josef Bacik
2020-01-30 14:02 ` David Sterba
2020-02-06 18:10 ` [PATCH 11/11 " David Sterba
2020-02-06 19:40 ` Nikolay Borisov
2020-02-14 15:33 ` David Sterba
2020-02-06 19:59 ` [PATCH 00/11] Make pinned extents tracking per-transaction David Sterba
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1b88a583-d90c-58e3-02b2-93c60a097110@suse.com \
--to=nborisov@suse.com \
--cc=dsterba@suse.cz \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox