From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Chao Yu <chao@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: skip f2fs_preallocate_blocks() for overwrite case
Date: Tue, 28 Sep 2021 12:08:14 -0700 [thread overview]
Message-ID: <YVNoHudG5c65X85G@google.com> (raw)
In-Reply-To: <20210928151911.11189-1-chao@kernel.org>
On 09/28, Chao Yu wrote:
> In f2fs_file_write_iter(), let's use f2fs_overwrite_io() to
> check whethere it is overwrite case, for such case, we can skip
> f2fs_preallocate_blocks() in order to avoid f2fs_do_map_lock(),
> which may be blocked by checkpoint() potentially.
>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> fs/f2fs/file.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 13deae03df06..51fecb2f4db5 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -4321,6 +4321,10 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> preallocated = true;
> target_size = iocb->ki_pos + iov_iter_count(from);
>
> + if (f2fs_overwrite_io(inode, iocb->ki_pos,
> + iov_iter_count(from)))
> + goto write;
This calls f2fs_map_blocks() which can be duplicate, if it's not the overwirte
case. Do we have other benefit?
> +
> err = f2fs_preallocate_blocks(iocb, from);
> if (err) {
> out_err:
> --
> 2.32.0
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WARNING: multiple messages have this Message-ID (diff)
From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Chao Yu <chao@kernel.org>
Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] f2fs: skip f2fs_preallocate_blocks() for overwrite case
Date: Tue, 28 Sep 2021 12:08:14 -0700 [thread overview]
Message-ID: <YVNoHudG5c65X85G@google.com> (raw)
In-Reply-To: <20210928151911.11189-1-chao@kernel.org>
On 09/28, Chao Yu wrote:
> In f2fs_file_write_iter(), let's use f2fs_overwrite_io() to
> check whethere it is overwrite case, for such case, we can skip
> f2fs_preallocate_blocks() in order to avoid f2fs_do_map_lock(),
> which may be blocked by checkpoint() potentially.
>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> fs/f2fs/file.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 13deae03df06..51fecb2f4db5 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -4321,6 +4321,10 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> preallocated = true;
> target_size = iocb->ki_pos + iov_iter_count(from);
>
> + if (f2fs_overwrite_io(inode, iocb->ki_pos,
> + iov_iter_count(from)))
> + goto write;
This calls f2fs_map_blocks() which can be duplicate, if it's not the overwirte
case. Do we have other benefit?
> +
> err = f2fs_preallocate_blocks(iocb, from);
> if (err) {
> out_err:
> --
> 2.32.0
next prev parent reply other threads:[~2021-09-28 19:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-28 15:19 [f2fs-dev] [PATCH] f2fs: skip f2fs_preallocate_blocks() for overwrite case Chao Yu
2021-09-28 15:19 ` Chao Yu
2021-09-28 19:08 ` Jaegeuk Kim [this message]
2021-09-28 19:08 ` Jaegeuk Kim
2021-09-29 0:05 ` [f2fs-dev] " Chao Yu
2021-09-29 0:05 ` Chao Yu
2021-10-29 2:34 ` [f2fs-dev] " Chao Yu
2021-10-29 2:34 ` Chao Yu
2021-10-29 17:43 ` Jaegeuk Kim
2021-10-29 17:43 ` Jaegeuk Kim
2021-10-30 3:02 ` Chao Yu
2021-10-30 3:02 ` Chao Yu
2021-12-12 3:57 ` Chao Yu
2021-12-12 3:57 ` Chao Yu
2021-12-14 18:56 ` Jaegeuk Kim
2021-12-14 18:56 ` Jaegeuk Kim
2022-02-04 9:10 ` Chao Yu
2022-02-04 9:10 ` Chao Yu
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