From: patchwork-bot+f2fs@kernel.org
To: Chao Yu <chao@kernel.org>
Cc: jaegeuk@kernel.org, linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH v3] f2fs: fix to avoid racing in between read and OPU dio write
Date: Mon, 05 Aug 2024 23:30:52 +0000 [thread overview]
Message-ID: <172290065212.2803.17197676609534608059.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20240627071521.1557830-1-chao@kernel.org>
Hello:
This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:
On Thu, 27 Jun 2024 15:15:21 +0800 you wrote:
> If lfs mode is on, buffered read may race w/ OPU dio write as below,
> it may cause buffered read hits unwritten data unexpectly, and for
> dio read, the race condition exists as well.
>
> Thread A Thread B
> - f2fs_file_write_iter
> - f2fs_dio_write_iter
> - __iomap_dio_rw
> - f2fs_iomap_begin
> - f2fs_map_blocks
> - __allocate_data_block
> - allocated blkaddr #x
> - iomap_dio_submit_bio
> - f2fs_file_read_iter
> - filemap_read
> - f2fs_read_data_folio
> - f2fs_mpage_readpages
> - f2fs_map_blocks
> : get blkaddr #x
> - f2fs_submit_read_bio
> IRQ
> - f2fs_read_end_io
> : read IO on blkaddr #x complete
> IRQ
> - iomap_dio_bio_end_io
> : direct write IO on blkaddr #x complete
>
> [...]
Here is the summary with links:
- [f2fs-dev,v3] f2fs: fix to avoid racing in between read and OPU dio write
https://git.kernel.org/jaegeuk/f2fs/c/415ea641b020
You are awesome, thank you!
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prev parent reply other threads:[~2024-08-05 23:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-27 7:15 [f2fs-dev] [PATCH v3] f2fs: fix to avoid racing in between read and OPU dio write Chao Yu
2024-08-05 23:30 ` patchwork-bot+f2fs [this message]
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