From: Stefan Roesch <shr@fb.com>
To: <kernel-team@fb.com>, <io-uring@vger.kernel.org>,
<linux-btrfs@vger.kernel.org>
Cc: <shr@fb.com>, <axboe@kernel.dk>, <josef@toxicpanda.com>
Subject: [PATCH v1 07/10] btrfs: make lock_and_cleanup_extent_if_need nowait compatible
Date: Thu, 1 Sep 2022 15:58:46 -0700 [thread overview]
Message-ID: <20220901225849.42898-8-shr@fb.com> (raw)
In-Reply-To: <20220901225849.42898-1-shr@fb.com>
This adds the nowait parameter to lock_and_cleanup_extent_if_need(). If
the nowait parameter is specified we try to lock the extent in nowait
mode.
Signed-off-by: Stefan Roesch <shr@fb.com>
---
fs/btrfs/file.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index d529f61ac5b9..ef9175efbf99 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1440,7 +1440,7 @@ static noinline int
lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
size_t num_pages, loff_t pos,
size_t write_bytes,
- u64 *lockstart, u64 *lockend,
+ u64 *lockstart, u64 *lockend, bool nowait,
struct extent_state **cached_state)
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
@@ -1455,8 +1455,20 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
if (start_pos < inode->vfs_inode.i_size) {
struct btrfs_ordered_extent *ordered;
- lock_extent_bits(&inode->io_tree, start_pos, last_pos,
+ if (nowait) {
+ if (!try_lock_extent(&inode->io_tree, start_pos, last_pos)) {
+ for (i = 0; i < num_pages; i++) {
+ unlock_page(pages[i]);
+ put_page(pages[i]);
+ }
+
+ return -EWOULDBLOCK;
+ }
+ } else {
+ lock_extent_bits(&inode->io_tree, start_pos, last_pos,
cached_state);
+ }
+
ordered = btrfs_lookup_ordered_range(inode, start_pos,
last_pos - start_pos + 1);
if (ordered &&
@@ -1755,7 +1767,7 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb,
extents_locked = lock_and_cleanup_extent_if_need(
BTRFS_I(inode), pages,
num_pages, pos, write_bytes, &lockstart,
- &lockend, &cached_state);
+ &lockend, false, &cached_state);
if (extents_locked < 0) {
if (extents_locked == -EAGAIN)
goto again;
--
2.30.2
next prev parent reply other threads:[~2022-09-01 22:59 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 22:58 [PATCH v1 00/10] io-uring/btrfs: support async buffered writes Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 01/10] btrfs: implement a nowait option for tree searches Stefan Roesch
2022-09-02 14:48 ` Filipe Manana
2022-09-02 14:57 ` Jens Axboe
2022-09-02 15:04 ` Filipe Manana
2022-09-08 0:29 ` Stefan Roesch
2022-09-08 0:28 ` Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 02/10] btrfs: make can_nocow_extent nowait compatible Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 03/10] btrfs: add the ability to use NO_FLUSH for data reservations Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 04/10] btrfs: add btrfs_try_lock_ordered_range Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 05/10] btrfs: make btrfs_check_nocow_lock nowait compatible Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 06/10] btrfs: make prepare_pages " Stefan Roesch
2022-09-01 22:58 ` Stefan Roesch [this message]
2022-09-01 22:58 ` [PATCH v1 08/10] btrfs: btrfs: plumb NOWAIT through the write path Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 09/10] btrfs: make balance_dirty_pages nowait compatible Stefan Roesch
2022-09-02 14:34 ` kernel test robot
2022-09-02 14:43 ` Jens Axboe
2022-09-08 0:26 ` Stefan Roesch
2022-09-01 22:58 ` [PATCH v1 10/10] btrfs: enable nowait async buffered writes Stefan Roesch
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