Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
f2fs: add a sysfs entry to show max open zones
This patch adds a sysfs entry showing the max zones that F2FS can write
concurrently.
Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
authored by
Yongpeng Yang
and committed by
Jaegeuk Kim
89732017
581251e0
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Documentation/ABI/testing/sysfs-fs-f2fs
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Documentation/ABI/testing/sysfs-fs-f2fs
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Description: Shows the number of unusable blocks in a section which was defined by
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the zone capacity reported by underlying zoned device.
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What: /sys/fs/f2fs/<disk>/max_open_zones
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Date: November 2025
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Contact: "Yongpeng Yang" <yangyongpeng@xiaomi.com>
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Description: Shows the max number of zones that F2FS can write concurrently when a zoned
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device is mounted.
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What: /sys/fs/f2fs/<disk>/current_atomic_write
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Date: July 2022
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Contact: "Daeho Jeong" <daehojeong@google.com>
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fs/f2fs/sysfs.c
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fs/f2fs/sysfs.c
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F2FS_SBI_GENERAL_RW_ATTR(max_read_extent_count);
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#ifdef CONFIG_BLK_DEV_ZONED
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F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
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F2FS_SBI_GENERAL_RO_ATTR(max_open_zones);
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F2FS_SBI_GENERAL_RW_ATTR(blkzone_alloc_policy);
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#endif
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F2FS_SBI_GENERAL_RW_ATTR(carve_out);
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#endif
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#ifdef CONFIG_BLK_DEV_ZONED
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ATTR_LIST(unusable_blocks_per_sec),
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ATTR_LIST(max_open_zones),
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ATTR_LIST(blkzone_alloc_policy),
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#endif
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#ifdef CONFIG_F2FS_FS_COMPRESSION