From: Christoph Hellwig <hch@infradead.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: linux-block@vger.kernel.org, linux-api@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-xfs@vger.kernel.org, Keith Busch <kbusch@kernel.org>,
linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Jaegeuk Kim <jaegeuk@kernel.org>,
linux-ext4@vger.kernel.org
Subject: Re: [f2fs-dev] [PATCH v4 6/9] f2fs: don't allow DIO reads but not DIO writes
Date: Sun, 21 Aug 2022 01:53:33 -0700 [thread overview]
Message-ID: <YwHyjVwCGBqzzbd/@infradead.org> (raw)
In-Reply-To: <YvrrEcw4E+rpDLwM@sol.localdomain>
On Mon, Aug 15, 2022 at 05:55:45PM -0700, Eric Biggers wrote:
> So if the zoned device feature becomes widely adopted, then STATX_DIOALIGN will
> be useless on all Android devices? That sounds undesirable. Are you sure that
We just need to fix f2fs to support direct I/O on zone devices. There
is not good reason not to support it, in fact the way how zoned devices
requires appends with the Zone Append semantics makes direct I/O way
safer than how f2fs does direct I/O currently on non-zoned devices.
Until then just supporting direct I/O reads on zoned devices for f2fs
seems like a really bad choice given that it will lead to nasty cache
incoherency.
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next prev parent reply other threads:[~2022-08-21 8:53 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-22 7:12 [f2fs-dev] [PATCH v4 0/9] make statx() return DIO alignment information Eric Biggers
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 1/9] statx: add direct I/O " Eric Biggers
2022-07-22 16:32 ` Darrick J. Wong
2022-07-22 17:31 ` Martin K. Petersen
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 2/9] vfs: support STATX_DIOALIGN on block devices Eric Biggers
2022-07-22 8:10 ` Christoph Hellwig
2022-07-22 17:32 ` Martin K. Petersen
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 3/9] fscrypt: change fscrypt_dio_supported() to prepare for STATX_DIOALIGN Eric Biggers
2022-07-22 8:10 ` Christoph Hellwig
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 4/9] ext4: support STATX_DIOALIGN Eric Biggers
2022-07-22 17:05 ` Theodore Ts'o
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 5/9] f2fs: move f2fs_force_buffered_io() into file.c Eric Biggers
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 6/9] f2fs: don't allow DIO reads but not DIO writes Eric Biggers
2022-07-24 2:01 ` Jaegeuk Kim
2022-07-25 18:12 ` Eric Biggers
2022-07-31 3:08 ` Jaegeuk Kim
2022-08-16 0:55 ` Eric Biggers
2022-08-16 9:03 ` Dave Chinner
[not found] ` <D1CDACE3-EC7E-43E4-8F49-EEA2B6E71A41@dilger.ca>
2022-08-19 23:09 ` Eric Biggers
2022-08-20 0:06 ` Jaegeuk Kim
2022-08-20 0:33 ` Eric Biggers
2022-08-21 8:53 ` Christoph Hellwig [this message]
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 7/9] f2fs: simplify f2fs_force_buffered_io() Eric Biggers
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 8/9] f2fs: support STATX_DIOALIGN Eric Biggers
2022-07-22 7:12 ` [f2fs-dev] [PATCH v4 9/9] xfs: " Eric Biggers
2022-07-22 8:11 ` Christoph Hellwig
2022-07-22 16:24 ` Darrick J. Wong
2022-08-26 17:19 ` [f2fs-dev] [PATCH v4 0/9] make statx() return DIO alignment information Jeff Layton
2022-08-27 7:07 ` Eric Biggers
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