From: Qu Wenruo <wqu@suse.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH 11/12] btrfs: extent_io: make lock_extent_buffer_for_io() to support subpage metadata
Date: Mon, 22 Feb 2021 14:33:56 +0800 [thread overview]
Message-ID: <20210222063357.92930-12-wqu@suse.com> (raw)
In-Reply-To: <20210222063357.92930-1-wqu@suse.com>
For subpage metadata, we don't use page locking at all.
So just skip the page locking part for subpage.
All the remaining routine can be reused.
Signed-off-by: Qu Wenruo <wqu@suse.com>
---
fs/btrfs/extent_io.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index ea603c1f2994..edfca14a158e 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3927,7 +3927,13 @@ static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb
btrfs_tree_unlock(eb);
- if (!ret)
+ /*
+ * Either we don't need to submit any tree block, or we're submitting
+ * subpage.
+ * Subpage metadata doesn't use page locking at all, so we can skip
+ * the page locking.
+ */
+ if (!ret || fs_info->sectorsize < PAGE_SIZE)
return ret;
num_pages = num_extent_pages(eb);
--
2.30.0
next prev parent reply other threads:[~2021-02-22 6:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 6:33 [PATCH 00/12] btrfs: support read-write for subpage metadata Qu Wenruo
2021-02-22 6:33 ` [PATCH 01/12] btrfs: subpage: introduce helper for subpage dirty status Qu Wenruo
2021-02-22 6:33 ` [PATCH 02/12] btrfs: subpage: introduce helper for subpage writeback status Qu Wenruo
2021-02-22 6:33 ` [PATCH 03/12] btrfs: disk-io: allow btree_set_page_dirty() to do more sanity check on subpage metadata Qu Wenruo
2021-02-22 7:58 ` Su Yue
2021-03-01 16:29 ` David Sterba
2021-02-22 6:33 ` [PATCH 04/12] btrfs: disk-io: support subpage metadata csum calculation at write time Qu Wenruo
2021-02-22 6:33 ` [PATCH 05/12] btrfs: extent_io: make alloc_extent_buffer() check subpage dirty bitmap Qu Wenruo
2021-02-22 6:33 ` [PATCH 06/12] btrfs: extent_io: make the page uptodate assert check to handle subpage Qu Wenruo
2021-02-22 6:33 ` [PATCH 07/12] btrfs: extent_io: make set/clear_extent_buffer_dirty() to support subpage sized metadata Qu Wenruo
2021-02-22 6:33 ` [PATCH 08/12] btrfs: extent_io: make set_btree_ioerr() accept extent buffer and handle subpage metadata Qu Wenruo
2021-02-22 6:33 ` [PATCH 09/12] btrfs: extent_io: introduce end_bio_subpage_eb_writepage() function Qu Wenruo
2021-03-01 16:33 ` David Sterba
2021-02-22 6:33 ` [PATCH 10/12] btrfs: extent_io: introduce write_one_subpage_eb() function Qu Wenruo
2021-02-22 6:33 ` Qu Wenruo [this message]
2021-02-22 6:33 ` [PATCH 12/12] btrfs: extent_io: introduce submit_eb_subpage() to submit a subpage metadata page Qu Wenruo
2021-03-01 16:22 ` [PATCH 00/12] btrfs: support read-write for subpage metadata David Sterba
2021-03-01 16:30 ` David Sterba
2021-03-02 0:18 ` Qu Wenruo
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